./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --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_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya --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 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:51:47,102 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:51:47,186 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:51:47,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:51:47,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:51:47,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:51:47,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:51:47,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:51:47,217 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:51:47,217 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:51:47,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:51:47,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:51:47,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:51:47,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:51:47,220 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:51:47,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:51:47,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:51:47,222 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:51:47,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:51:47,223 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:51:47,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:51:47,224 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:51:47,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:51:47,225 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:51:47,226 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:51:47,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:51:47,227 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:51:47,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:51:47,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:51:47,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:51:47,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:51:47,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:51:47,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:51:47,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:51:47,230 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:51:47,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:51:47,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:51:47,231 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_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2023-11-29 02:51:47,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:51:47,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:51:47,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:51:47,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:51:47,494 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:51:47,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-29 02:51:50,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:51:50,427 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:51:50,428 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2023-11-29 02:51:50,434 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/data/a7c627401/623040d827e0448a88b3a15ceadb8a1f/FLAG2530f4bd1 [2023-11-29 02:51:50,445 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/data/a7c627401/623040d827e0448a88b3a15ceadb8a1f [2023-11-29 02:51:50,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:51:50,448 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:51:50,449 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:51:50,449 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:51:50,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:51:50,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536b5c36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50, skipping insertion in model container [2023-11-29 02:51:50,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,484 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:51:50,643 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_38eb4472-4975-435d-a42e-9180fbc7c0ed/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3822,3835] [2023-11-29 02:51:50,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:51:50,665 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:51:50,693 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_38eb4472-4975-435d-a42e-9180fbc7c0ed/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3822,3835] [2023-11-29 02:51:50,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:51:50,707 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:51:50,708 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:51:50,716 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:51:50,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50 WrapperNode [2023-11-29 02:51:50,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:51:50,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:51:50,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:51:50,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:51:50,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,768 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 260 [2023-11-29 02:51:50,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:51:50,769 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:51:50,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:51:50,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:51:50,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,816 INFO L175 MemorySlicer]: Split 14 memory accesses to 6 slices as follows [2, 2, 2, 2, 4, 2]. 29 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2023-11-29 02:51:50,816 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,816 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:51:50,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:51:50,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:51:50,863 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:51:50,864 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (1/1) ... [2023-11-29 02:51:50,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:51:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:51:50,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:51:50,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:51:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:51:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:51:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:51:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:51:50,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:51:50,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:51:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:51:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 02:51:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:51:50,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:51:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:51:50,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 02:51:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 02:51:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:51:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:51:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:51:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:51:50,962 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:51:51,097 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:51:51,099 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:51:51,475 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:51:51,793 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:51:51,793 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 02:51:51,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:51:51 BoogieIcfgContainer [2023-11-29 02:51:51,794 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:51:51,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:51:51,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:51:51,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:51:51,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:51:50" (1/3) ... [2023-11-29 02:51:51,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62143f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:51:51, skipping insertion in model container [2023-11-29 02:51:51,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:51:50" (2/3) ... [2023-11-29 02:51:51,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62143f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:51:51, skipping insertion in model container [2023-11-29 02:51:51,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:51:51" (3/3) ... [2023-11-29 02:51:51,802 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-11-29 02:51:51,812 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 02:51:51,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:51:51,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:51:51,823 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:51:51,895 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-29 02:51:51,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 62 transitions, 164 flow [2023-11-29 02:51:51,970 INFO L124 PetriNetUnfolderBase]: 9/54 cut-off events. [2023-11-29 02:51:51,971 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 02:51:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 54 events. 9/54 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 99 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2023-11-29 02:51:51,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 62 transitions, 164 flow [2023-11-29 02:51:51,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 136 flow [2023-11-29 02:51:51,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:51:51,997 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;@74f143f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:51:51,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 02:51:52,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:51:52,016 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2023-11-29 02:51:52,016 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 02:51:52,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:52,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:52,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:51:52,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1944011567, now seen corresponding path program 1 times [2023-11-29 02:51:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:52,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600921730] [2023-11-29 02:51:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:52,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:52,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:52,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600921730] [2023-11-29 02:51:52,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600921730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:51:52,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:51:52,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:51:52,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210514465] [2023-11-29 02:51:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:51:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:51:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:51:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:51:52,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:51:52,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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) [2023-11-29 02:51:52,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:52,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:51:52,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:51:53,396 INFO L124 PetriNetUnfolderBase]: 6308/8795 cut-off events. [2023-11-29 02:51:53,396 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2023-11-29 02:51:53,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17977 conditions, 8795 events. 6308/8795 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47070 event pairs, 4929 based on Foata normal form. 1210/8524 useless extension candidates. Maximal degree in co-relation 17892. Up to 8399 conditions per place. [2023-11-29 02:51:53,520 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 43 selfloop transitions, 0 changer transitions 0/50 dead transitions. [2023-11-29 02:51:53,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 216 flow [2023-11-29 02:51:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:51:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 02:51:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2023-11-29 02:51:53,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-11-29 02:51:53,535 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 68 transitions. [2023-11-29 02:51:53,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 68 transitions. [2023-11-29 02:51:53,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:51:53,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 68 transitions. [2023-11-29 02:51:53,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 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) [2023-11-29 02:51:53,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-29 02:51:53,547 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-29 02:51:53,549 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 136 flow. Second operand 2 states and 68 transitions. [2023-11-29 02:51:53,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 216 flow [2023-11-29 02:51:53,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-29 02:51:53,564 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 110 flow [2023-11-29 02:51:53,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=110, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-11-29 02:51:53,570 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-29 02:51:53,570 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 110 flow [2023-11-29 02:51:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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) [2023-11-29 02:51:53,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:53,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:51:53,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:51:53,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash 405410714, now seen corresponding path program 1 times [2023-11-29 02:51:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:53,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50107599] [2023-11-29 02:51:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50107599] [2023-11-29 02:51:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50107599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:51:53,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:51:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:51:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226362548] [2023-11-29 02:51:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:51:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:51:53,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:51:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:51:53,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:51:53,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2023-11-29 02:51:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:51:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:51:55,563 INFO L124 PetriNetUnfolderBase]: 14756/20385 cut-off events. [2023-11-29 02:51:55,564 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-29 02:51:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40482 conditions, 20385 events. 14756/20385 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 120736 event pairs, 6229 based on Foata normal form. 1/17107 useless extension candidates. Maximal degree in co-relation 40479. Up to 8609 conditions per place. [2023-11-29 02:51:55,714 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 105 selfloop transitions, 6 changer transitions 1/119 dead transitions. [2023-11-29 02:51:55,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 119 transitions, 488 flow [2023-11-29 02:51:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:51:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:51:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2023-11-29 02:51:55,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61328125 [2023-11-29 02:51:55,717 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 157 transitions. [2023-11-29 02:51:55,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 157 transitions. [2023-11-29 02:51:55,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:51:55,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 157 transitions. [2023-11-29 02:51:55,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2023-11-29 02:51:55,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2023-11-29 02:51:55,721 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2023-11-29 02:51:55,721 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 110 flow. Second operand 4 states and 157 transitions. [2023-11-29 02:51:55,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 119 transitions, 488 flow [2023-11-29 02:51:55,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 488 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:51:55,725 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 151 flow [2023-11-29 02:51:55,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-29 02:51:55,726 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-29 02:51:55,726 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 151 flow [2023-11-29 02:51:55,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2023-11-29 02:51:55,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:55,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:51:55,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:51:55,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1906066154, now seen corresponding path program 2 times [2023-11-29 02:51:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419474805] [2023-11-29 02:51:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:55,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419474805] [2023-11-29 02:51:55,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419474805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:51:55,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:51:55,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:51:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014361807] [2023-11-29 02:51:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:51:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:51:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:55,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:51:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:51:55,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:51:55,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2023-11-29 02:51:55,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:55,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:51:55,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:51:58,040 INFO L124 PetriNetUnfolderBase]: 22404/30871 cut-off events. [2023-11-29 02:51:58,040 INFO L125 PetriNetUnfolderBase]: For 3680/3682 co-relation queries the response was YES. [2023-11-29 02:51:58,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66181 conditions, 30871 events. 22404/30871 cut-off events. For 3680/3682 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 192839 event pairs, 7515 based on Foata normal form. 1/26227 useless extension candidates. Maximal degree in co-relation 66175. Up to 15559 conditions per place. [2023-11-29 02:51:58,167 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 105 selfloop transitions, 10 changer transitions 1/123 dead transitions. [2023-11-29 02:51:58,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 123 transitions, 553 flow [2023-11-29 02:51:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:51:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:51:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2023-11-29 02:51:58,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2023-11-29 02:51:58,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 156 transitions. [2023-11-29 02:51:58,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 156 transitions. [2023-11-29 02:51:58,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:51:58,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 156 transitions. [2023-11-29 02:51:58,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2023-11-29 02:51:58,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2023-11-29 02:51:58,173 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 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) [2023-11-29 02:51:58,173 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 151 flow. Second operand 4 states and 156 transitions. [2023-11-29 02:51:58,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 123 transitions, 553 flow [2023-11-29 02:51:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 123 transitions, 553 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 02:51:58,180 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 219 flow [2023-11-29 02:51:58,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-29 02:51:58,181 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-11-29 02:51:58,181 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 219 flow [2023-11-29 02:51:58,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2023-11-29 02:51:58,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:51:58,182 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:51:58,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:51:58,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:51:58,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:51:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1571024204, now seen corresponding path program 1 times [2023-11-29 02:51:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:51:58,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393758318] [2023-11-29 02:51:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:51:58,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:51:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:51:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:51:58,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:51:58,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393758318] [2023-11-29 02:51:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393758318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:51:58,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:51:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:51:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602503423] [2023-11-29 02:51:58,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:51:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:51:58,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:51:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:51:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:51:58,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:51:58,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-29 02:51:58,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:51:58,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:51:58,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:02,129 INFO L124 PetriNetUnfolderBase]: 33993/47095 cut-off events. [2023-11-29 02:52:02,129 INFO L125 PetriNetUnfolderBase]: For 16917/16929 co-relation queries the response was YES. [2023-11-29 02:52:02,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107509 conditions, 47095 events. 33993/47095 cut-off events. For 16917/16929 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 312892 event pairs, 21592 based on Foata normal form. 658/40703 useless extension candidates. Maximal degree in co-relation 107500. Up to 30007 conditions per place. [2023-11-29 02:52:02,335 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 123 selfloop transitions, 5 changer transitions 1/136 dead transitions. [2023-11-29 02:52:02,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 136 transitions, 722 flow [2023-11-29 02:52:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:52:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:52:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2023-11-29 02:52:02,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2023-11-29 02:52:02,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 167 transitions. [2023-11-29 02:52:02,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 167 transitions. [2023-11-29 02:52:02,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:02,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 167 transitions. [2023-11-29 02:52:02,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.4) internal successors, (167), 5 states have internal predecessors, (167), 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) [2023-11-29 02:52:02,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-29 02:52:02,339 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-29 02:52:02,340 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 219 flow. Second operand 5 states and 167 transitions. [2023-11-29 02:52:02,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 136 transitions, 722 flow [2023-11-29 02:52:02,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 136 transitions, 714 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-29 02:52:02,428 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 263 flow [2023-11-29 02:52:02,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-11-29 02:52:02,429 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2023-11-29 02:52:02,430 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 263 flow [2023-11-29 02:52:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-29 02:52:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:52:02,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:02,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -847415862, now seen corresponding path program 1 times [2023-11-29 02:52:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:02,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756842310] [2023-11-29 02:52:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:02,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:02,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:02,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756842310] [2023-11-29 02:52:02,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756842310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:52:02,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:52:02,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:52:02,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979211460] [2023-11-29 02:52:02,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:52:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:52:02,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:02,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:52:02,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:52:02,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:02,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-29 02:52:02,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:02,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:02,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:05,381 INFO L124 PetriNetUnfolderBase]: 26601/36836 cut-off events. [2023-11-29 02:52:05,381 INFO L125 PetriNetUnfolderBase]: For 15983/15995 co-relation queries the response was YES. [2023-11-29 02:52:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84929 conditions, 36836 events. 26601/36836 cut-off events. For 15983/15995 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 237829 event pairs, 20562 based on Foata normal form. 578/31733 useless extension candidates. Maximal degree in co-relation 84916. Up to 30007 conditions per place. [2023-11-29 02:52:05,547 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 53 selfloop transitions, 2 changer transitions 43/105 dead transitions. [2023-11-29 02:52:05,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 562 flow [2023-11-29 02:52:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:52:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:52:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2023-11-29 02:52:05,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2023-11-29 02:52:05,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 143 transitions. [2023-11-29 02:52:05,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 143 transitions. [2023-11-29 02:52:05,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:05,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 143 transitions. [2023-11-29 02:52:05,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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) [2023-11-29 02:52:05,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-29 02:52:05,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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) [2023-11-29 02:52:05,552 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 263 flow. Second operand 5 states and 143 transitions. [2023-11-29 02:52:05,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 562 flow [2023-11-29 02:52:05,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 558 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:52:05,565 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 241 flow [2023-11-29 02:52:05,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2023-11-29 02:52:05,566 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-11-29 02:52:05,566 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 241 flow [2023-11-29 02:52:05,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2023-11-29 02:52:05,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:05,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:05,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:52:05,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:05,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -563062872, now seen corresponding path program 1 times [2023-11-29 02:52:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:05,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717586781] [2023-11-29 02:52:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:05,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:05,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717586781] [2023-11-29 02:52:05,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717586781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61694746] [2023-11-29 02:52:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:05,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:05,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:05,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:05,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:52:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:05,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:52:05,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:06,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:06,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61694746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:06,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:06,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:52:06,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332371689] [2023-11-29 02:52:06,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:06,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:52:06,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:52:06,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:52:06,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:06,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 241 flow. Second operand has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 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) [2023-11-29 02:52:06,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:06,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:06,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:09,925 INFO L124 PetriNetUnfolderBase]: 33993/47000 cut-off events. [2023-11-29 02:52:09,925 INFO L125 PetriNetUnfolderBase]: For 24873/24885 co-relation queries the response was YES. [2023-11-29 02:52:10,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112016 conditions, 47000 events. 33993/47000 cut-off events. For 24873/24885 co-relation queries the response was YES. Maximal size of possible extension queue 2173. Compared 314961 event pairs, 15988 based on Foata normal form. 658/40630 useless extension candidates. Maximal degree in co-relation 112001. Up to 21139 conditions per place. [2023-11-29 02:52:10,161 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 157 selfloop transitions, 7 changer transitions 1/172 dead transitions. [2023-11-29 02:52:10,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 172 transitions, 967 flow [2023-11-29 02:52:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:52:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:52:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2023-11-29 02:52:10,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48660714285714285 [2023-11-29 02:52:10,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 218 transitions. [2023-11-29 02:52:10,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 218 transitions. [2023-11-29 02:52:10,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:10,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 218 transitions. [2023-11-29 02:52:10,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 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) [2023-11-29 02:52:10,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-29 02:52:10,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-29 02:52:10,165 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 241 flow. Second operand 7 states and 218 transitions. [2023-11-29 02:52:10,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 172 transitions, 967 flow [2023-11-29 02:52:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 172 transitions, 941 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-11-29 02:52:10,228 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 290 flow [2023-11-29 02:52:10,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-11-29 02:52:10,228 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-11-29 02:52:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 290 flow [2023-11-29 02:52:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 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) [2023-11-29 02:52:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:10,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:10,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:52:10,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:10,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:10,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 858617304, now seen corresponding path program 1 times [2023-11-29 02:52:10,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:10,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115321196] [2023-11-29 02:52:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:10,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:10,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:10,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115321196] [2023-11-29 02:52:10,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115321196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:10,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316934208] [2023-11-29 02:52:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:10,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:10,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:10,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:10,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:52:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:10,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:52:10,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:10,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:10,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316934208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:10,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 02:52:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149209696] [2023-11-29 02:52:10,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:10,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 02:52:10,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 02:52:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:52:10,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:10,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:10,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:10,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:10,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:14,120 INFO L124 PetriNetUnfolderBase]: 25921/36085 cut-off events. [2023-11-29 02:52:14,120 INFO L125 PetriNetUnfolderBase]: For 19812/19824 co-relation queries the response was YES. [2023-11-29 02:52:14,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87376 conditions, 36085 events. 25921/36085 cut-off events. For 19812/19824 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 235268 event pairs, 10564 based on Foata normal form. 1258/31684 useless extension candidates. Maximal degree in co-relation 87361. Up to 16234 conditions per place. [2023-11-29 02:52:14,300 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 80 selfloop transitions, 5 changer transitions 45/137 dead transitions. [2023-11-29 02:52:14,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 137 transitions, 793 flow [2023-11-29 02:52:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:52:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 02:52:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2023-11-29 02:52:14,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2023-11-29 02:52:14,302 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 189 transitions. [2023-11-29 02:52:14,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 189 transitions. [2023-11-29 02:52:14,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:14,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 189 transitions. [2023-11-29 02:52:14,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 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) [2023-11-29 02:52:14,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-29 02:52:14,305 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 64.0) internal successors, (512), 8 states have internal predecessors, (512), 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) [2023-11-29 02:52:14,305 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 290 flow. Second operand 7 states and 189 transitions. [2023-11-29 02:52:14,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 137 transitions, 793 flow [2023-11-29 02:52:14,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 137 transitions, 785 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-29 02:52:14,327 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 284 flow [2023-11-29 02:52:14,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=284, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-29 02:52:14,328 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2023-11-29 02:52:14,328 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 284 flow [2023-11-29 02:52:14,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:52:14,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:14,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:14,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 02:52:14,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:52:14,530 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2101424866, now seen corresponding path program 2 times [2023-11-29 02:52:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969633060] [2023-11-29 02:52:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:14,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:14,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969633060] [2023-11-29 02:52:14,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969633060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:14,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600820912] [2023-11-29 02:52:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:52:14,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:14,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:52:14,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:52:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:52:14,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:52:14,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:14,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600820912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:15,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:52:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-29 02:52:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541048929] [2023-11-29 02:52:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:52:15,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:52:15,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:52:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:52:15,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 284 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2023-11-29 02:52:15,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:15,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:16,842 INFO L124 PetriNetUnfolderBase]: 16534/22840 cut-off events. [2023-11-29 02:52:16,842 INFO L125 PetriNetUnfolderBase]: For 21083/21089 co-relation queries the response was YES. [2023-11-29 02:52:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62068 conditions, 22840 events. 16534/22840 cut-off events. For 21083/21089 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 137541 event pairs, 7813 based on Foata normal form. 562/19789 useless extension candidates. Maximal degree in co-relation 62049. Up to 18812 conditions per place. [2023-11-29 02:52:16,970 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 72 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2023-11-29 02:52:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 524 flow [2023-11-29 02:52:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:52:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:52:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2023-11-29 02:52:16,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2023-11-29 02:52:16,972 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 132 transitions. [2023-11-29 02:52:16,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 132 transitions. [2023-11-29 02:52:16,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:16,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 132 transitions. [2023-11-29 02:52:16,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2023-11-29 02:52:16,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-29 02:52:16,973 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-29 02:52:16,973 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 284 flow. Second operand 6 states and 132 transitions. [2023-11-29 02:52:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 524 flow [2023-11-29 02:52:17,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 478 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-11-29 02:52:17,019 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 286 flow [2023-11-29 02:52:17,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-11-29 02:52:17,019 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-11-29 02:52:17,020 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 286 flow [2023-11-29 02:52:17,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2023-11-29 02:52:17,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:17,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:17,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:52:17,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 02:52:17,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:17,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:17,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1559523336, now seen corresponding path program 2 times [2023-11-29 02:52:17,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:17,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110862109] [2023-11-29 02:52:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:17,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:17,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:17,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110862109] [2023-11-29 02:52:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110862109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173846881] [2023-11-29 02:52:17,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:52:17,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:17,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:17,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:17,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:52:17,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:52:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:52:17,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:52:17,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:17,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:52:17,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173846881] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:17,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:52:17,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-29 02:52:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983310997] [2023-11-29 02:52:17,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:52:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:52:17,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:52:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:52:17,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:17,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2023-11-29 02:52:17,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:17,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:17,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:19,193 INFO L124 PetriNetUnfolderBase]: 13806/19275 cut-off events. [2023-11-29 02:52:19,193 INFO L125 PetriNetUnfolderBase]: For 13629/13635 co-relation queries the response was YES. [2023-11-29 02:52:19,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50396 conditions, 19275 events. 13806/19275 cut-off events. For 13629/13635 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 114094 event pairs, 7701 based on Foata normal form. 462/16592 useless extension candidates. Maximal degree in co-relation 50381. Up to 13146 conditions per place. [2023-11-29 02:52:19,309 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 92 selfloop transitions, 6 changer transitions 1/106 dead transitions. [2023-11-29 02:52:19,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 641 flow [2023-11-29 02:52:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:52:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:52:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2023-11-29 02:52:19,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2023-11-29 02:52:19,311 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2023-11-29 02:52:19,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2023-11-29 02:52:19,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:19,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2023-11-29 02:52:19,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 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) [2023-11-29 02:52:19,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-29 02:52:19,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 64.0) internal successors, (448), 7 states have internal predecessors, (448), 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) [2023-11-29 02:52:19,314 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 286 flow. Second operand 6 states and 143 transitions. [2023-11-29 02:52:19,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 641 flow [2023-11-29 02:52:19,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 612 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-29 02:52:19,329 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 289 flow [2023-11-29 02:52:19,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-29 02:52:19,330 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-11-29 02:52:19,330 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 289 flow [2023-11-29 02:52:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2023-11-29 02:52:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:19,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:52:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:19,531 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:19,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1932435797, now seen corresponding path program 1 times [2023-11-29 02:52:19,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722962405] [2023-11-29 02:52:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:20,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722962405] [2023-11-29 02:52:20,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722962405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:20,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875309401] [2023-11-29 02:52:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:20,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:20,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:20,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:52:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:20,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:52:20,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:20,809 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 19 treesize of output 7 [2023-11-29 02:52:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:20,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:20,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:52:20,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-11-29 02:52:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875309401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:20,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:20,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 14 [2023-11-29 02:52:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638489295] [2023-11-29 02:52:20,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:20,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:52:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:52:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:52:20,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:20,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 289 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2023-11-29 02:52:20,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:20,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:20,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:24,732 INFO L124 PetriNetUnfolderBase]: 24882/34719 cut-off events. [2023-11-29 02:52:24,732 INFO L125 PetriNetUnfolderBase]: For 23274/23280 co-relation queries the response was YES. [2023-11-29 02:52:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89554 conditions, 34719 events. 24882/34719 cut-off events. For 23274/23280 co-relation queries the response was YES. Maximal size of possible extension queue 1221. Compared 222081 event pairs, 6885 based on Foata normal form. 1/29278 useless extension candidates. Maximal degree in co-relation 89538. Up to 11493 conditions per place. [2023-11-29 02:52:24,929 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 254 selfloop transitions, 28 changer transitions 3/292 dead transitions. [2023-11-29 02:52:24,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 292 transitions, 1620 flow [2023-11-29 02:52:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:52:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:52:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 397 transitions. [2023-11-29 02:52:24,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47716346153846156 [2023-11-29 02:52:24,931 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 397 transitions. [2023-11-29 02:52:24,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 397 transitions. [2023-11-29 02:52:24,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:24,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 397 transitions. [2023-11-29 02:52:24,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 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) [2023-11-29 02:52:24,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-29 02:52:24,934 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 64.0) internal successors, (896), 14 states have internal predecessors, (896), 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) [2023-11-29 02:52:24,934 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 289 flow. Second operand 13 states and 397 transitions. [2023-11-29 02:52:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 292 transitions, 1620 flow [2023-11-29 02:52:24,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 292 transitions, 1610 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:52:24,963 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 463 flow [2023-11-29 02:52:24,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=463, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2023-11-29 02:52:24,964 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2023-11-29 02:52:24,964 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 463 flow [2023-11-29 02:52:24,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2023-11-29 02:52:24,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:24,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:24,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:52:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:25,166 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:25,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -794310391, now seen corresponding path program 2 times [2023-11-29 02:52:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:25,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677879625] [2023-11-29 02:52:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:25,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677879625] [2023-11-29 02:52:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677879625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240405886] [2023-11-29 02:52:25,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:52:25,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:25,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:25,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:25,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:52:25,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:52:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:52:25,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:52:25,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:26,203 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 19 treesize of output 7 [2023-11-29 02:52:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:26,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:26,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:52:26,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 14 [2023-11-29 02:52:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240405886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:26,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:26,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-11-29 02:52:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146234282] [2023-11-29 02:52:26,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 02:52:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 02:52:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:52:26,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:26,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 463 flow. Second operand has 26 states, 26 states have (on average 14.5) internal successors, (377), 26 states have internal predecessors, (377), 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) [2023-11-29 02:52:26,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:26,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:26,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:32,611 INFO L124 PetriNetUnfolderBase]: 41966/58334 cut-off events. [2023-11-29 02:52:32,611 INFO L125 PetriNetUnfolderBase]: For 59113/59119 co-relation queries the response was YES. [2023-11-29 02:52:32,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161743 conditions, 58334 events. 41966/58334 cut-off events. For 59113/59119 co-relation queries the response was YES. Maximal size of possible extension queue 2130. Compared 392183 event pairs, 9251 based on Foata normal form. 3/49663 useless extension candidates. Maximal degree in co-relation 161723. Up to 23642 conditions per place. [2023-11-29 02:52:32,964 INFO L140 encePairwiseOnDemand]: 51/64 looper letters, 366 selfloop transitions, 71 changer transitions 7/451 dead transitions. [2023-11-29 02:52:32,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 451 transitions, 2867 flow [2023-11-29 02:52:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:52:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 02:52:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 614 transitions. [2023-11-29 02:52:32,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43607954545454547 [2023-11-29 02:52:32,967 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 614 transitions. [2023-11-29 02:52:32,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 614 transitions. [2023-11-29 02:52:32,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:32,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 614 transitions. [2023-11-29 02:52:32,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 27.90909090909091) internal successors, (614), 22 states have internal predecessors, (614), 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) [2023-11-29 02:52:32,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 64.0) internal successors, (1472), 23 states have internal predecessors, (1472), 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) [2023-11-29 02:52:32,972 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 64.0) internal successors, (1472), 23 states have internal predecessors, (1472), 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) [2023-11-29 02:52:32,972 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 463 flow. Second operand 22 states and 614 transitions. [2023-11-29 02:52:32,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 451 transitions, 2867 flow [2023-11-29 02:52:33,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 451 transitions, 2704 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-11-29 02:52:33,108 INFO L231 Difference]: Finished difference. Result has 116 places, 145 transitions, 1145 flow [2023-11-29 02:52:33,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1145, PETRI_PLACES=116, PETRI_TRANSITIONS=145} [2023-11-29 02:52:33,109 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2023-11-29 02:52:33,109 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 145 transitions, 1145 flow [2023-11-29 02:52:33,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.5) internal successors, (377), 26 states have internal predecessors, (377), 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) [2023-11-29 02:52:33,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:33,109 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:33,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:52:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:33,310 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:33,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1907786077, now seen corresponding path program 1 times [2023-11-29 02:52:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:33,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970486810] [2023-11-29 02:52:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970486810] [2023-11-29 02:52:33,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970486810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857617356] [2023-11-29 02:52:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:33,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:33,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:52:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:34,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:52:34,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:34,169 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 19 treesize of output 7 [2023-11-29 02:52:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:34,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:34,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:52:34,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2023-11-29 02:52:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857617356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:34,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-11-29 02:52:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015648663] [2023-11-29 02:52:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:52:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:52:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:52:34,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:34,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 145 transitions, 1145 flow. Second operand has 17 states, 17 states have (on average 15.0) internal successors, (255), 17 states have internal predecessors, (255), 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) [2023-11-29 02:52:34,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:34,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:52:43,841 INFO L124 PetriNetUnfolderBase]: 56038/77779 cut-off events. [2023-11-29 02:52:43,841 INFO L125 PetriNetUnfolderBase]: For 142886/142896 co-relation queries the response was YES. [2023-11-29 02:52:44,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238941 conditions, 77779 events. 56038/77779 cut-off events. For 142886/142896 co-relation queries the response was YES. Maximal size of possible extension queue 2918. Compared 543326 event pairs, 19789 based on Foata normal form. 5/66346 useless extension candidates. Maximal degree in co-relation 238909. Up to 50276 conditions per place. [2023-11-29 02:52:44,559 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 378 selfloop transitions, 66 changer transitions 7/458 dead transitions. [2023-11-29 02:52:44,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 458 transitions, 3463 flow [2023-11-29 02:52:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:52:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:52:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 548 transitions. [2023-11-29 02:52:44,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506578947368421 [2023-11-29 02:52:44,561 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 548 transitions. [2023-11-29 02:52:44,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 548 transitions. [2023-11-29 02:52:44,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:52:44,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 548 transitions. [2023-11-29 02:52:44,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 28.842105263157894) internal successors, (548), 19 states have internal predecessors, (548), 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) [2023-11-29 02:52:44,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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) [2023-11-29 02:52:44,565 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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) [2023-11-29 02:52:44,565 INFO L175 Difference]: Start difference. First operand has 116 places, 145 transitions, 1145 flow. Second operand 19 states and 548 transitions. [2023-11-29 02:52:44,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 458 transitions, 3463 flow [2023-11-29 02:52:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 458 transitions, 3398 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-11-29 02:52:46,417 INFO L231 Difference]: Finished difference. Result has 137 places, 189 transitions, 1795 flow [2023-11-29 02:52:46,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1795, PETRI_PLACES=137, PETRI_TRANSITIONS=189} [2023-11-29 02:52:46,418 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2023-11-29 02:52:46,418 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 189 transitions, 1795 flow [2023-11-29 02:52:46,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.0) internal successors, (255), 17 states have internal predecessors, (255), 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) [2023-11-29 02:52:46,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:52:46,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:52:46,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:52:46,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:46,620 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:52:46,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:52:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash -607697395, now seen corresponding path program 3 times [2023-11-29 02:52:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:52:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245427878] [2023-11-29 02:52:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:52:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:52:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:52:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:52:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:52:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245427878] [2023-11-29 02:52:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245427878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:52:47,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322379839] [2023-11-29 02:52:47,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:52:47,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:52:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:52:47,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:52:47,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:52:47,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:52:47,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:52:47,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:52:47,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:52:47,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:52:47,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-11-29 02:52:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:47,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:52:48,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:52:48,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-11-29 02:52:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:52:48,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322379839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:52:48,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:52:48,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2023-11-29 02:52:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359908324] [2023-11-29 02:52:48,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:52:48,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:52:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:52:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:52:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:52:48,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:52:48,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 189 transitions, 1795 flow. Second operand has 29 states, 29 states have (on average 14.068965517241379) internal successors, (408), 29 states have internal predecessors, (408), 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) [2023-11-29 02:52:48,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:52:48,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:52:48,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:04,048 INFO L124 PetriNetUnfolderBase]: 76044/105698 cut-off events. [2023-11-29 02:53:04,048 INFO L125 PetriNetUnfolderBase]: For 263676/263686 co-relation queries the response was YES. [2023-11-29 02:53:04,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339972 conditions, 105698 events. 76044/105698 cut-off events. For 263676/263686 co-relation queries the response was YES. Maximal size of possible extension queue 4103. Compared 767429 event pairs, 23619 based on Foata normal form. 6/90165 useless extension candidates. Maximal degree in co-relation 339932. Up to 70719 conditions per place. [2023-11-29 02:53:05,042 INFO L140 encePairwiseOnDemand]: 49/64 looper letters, 583 selfloop transitions, 195 changer transitions 18/803 dead transitions. [2023-11-29 02:53:05,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 803 transitions, 6420 flow [2023-11-29 02:53:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:53:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 02:53:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 972 transitions. [2023-11-29 02:53:05,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43392857142857144 [2023-11-29 02:53:05,046 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 972 transitions. [2023-11-29 02:53:05,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 972 transitions. [2023-11-29 02:53:05,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:05,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 972 transitions. [2023-11-29 02:53:05,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 27.771428571428572) internal successors, (972), 35 states have internal predecessors, (972), 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) [2023-11-29 02:53:05,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 64.0) internal successors, (2304), 36 states have internal predecessors, (2304), 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) [2023-11-29 02:53:05,053 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 64.0) internal successors, (2304), 36 states have internal predecessors, (2304), 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) [2023-11-29 02:53:05,053 INFO L175 Difference]: Start difference. First operand has 137 places, 189 transitions, 1795 flow. Second operand 35 states and 972 transitions. [2023-11-29 02:53:05,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 803 transitions, 6420 flow [2023-11-29 02:53:10,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 803 transitions, 6139 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-11-29 02:53:10,686 INFO L231 Difference]: Finished difference. Result has 180 places, 350 transitions, 3908 flow [2023-11-29 02:53:10,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3908, PETRI_PLACES=180, PETRI_TRANSITIONS=350} [2023-11-29 02:53:10,687 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 123 predicate places. [2023-11-29 02:53:10,687 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 350 transitions, 3908 flow [2023-11-29 02:53:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 14.068965517241379) internal successors, (408), 29 states have internal predecessors, (408), 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) [2023-11-29 02:53:10,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:10,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:10,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:53:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:10,889 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:53:10,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1453048803, now seen corresponding path program 4 times [2023-11-29 02:53:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:53:10,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892559665] [2023-11-29 02:53:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:53:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:53:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:53:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892559665] [2023-11-29 02:53:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892559665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:53:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449264908] [2023-11-29 02:53:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:53:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:53:11,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:53:11,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:53:11,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:53:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:53:11,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:53:11,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:11,628 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 19 treesize of output 7 [2023-11-29 02:53:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:53:11,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:53:11,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:53:11,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2023-11-29 02:53:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:53:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449264908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:53:11,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:53:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-11-29 02:53:11,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234853684] [2023-11-29 02:53:11,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:53:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 02:53:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:53:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 02:53:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-29 02:53:11,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:53:11,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 350 transitions, 3908 flow. Second operand has 17 states, 17 states have (on average 14.882352941176471) internal successors, (253), 17 states have internal predecessors, (253), 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) [2023-11-29 02:53:11,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:53:11,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:53:11,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:53:29,212 INFO L124 PetriNetUnfolderBase]: 80360/111431 cut-off events. [2023-11-29 02:53:29,213 INFO L125 PetriNetUnfolderBase]: For 496077/496087 co-relation queries the response was YES. [2023-11-29 02:53:30,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420264 conditions, 111431 events. 80360/111431 cut-off events. For 496077/496087 co-relation queries the response was YES. Maximal size of possible extension queue 4505. Compared 815084 event pairs, 38353 based on Foata normal form. 5/95082 useless extension candidates. Maximal degree in co-relation 420211. Up to 97133 conditions per place. [2023-11-29 02:53:30,678 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 417 selfloop transitions, 69 changer transitions 2/495 dead transitions. [2023-11-29 02:53:30,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 495 transitions, 5774 flow [2023-11-29 02:53:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:53:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:53:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 307 transitions. [2023-11-29 02:53:30,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997395833333333 [2023-11-29 02:53:30,680 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 307 transitions. [2023-11-29 02:53:30,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 307 transitions. [2023-11-29 02:53:30,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:53:30,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 307 transitions. [2023-11-29 02:53:30,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.583333333333332) internal successors, (307), 12 states have internal predecessors, (307), 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) [2023-11-29 02:53:30,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 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) [2023-11-29 02:53:30,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 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) [2023-11-29 02:53:30,682 INFO L175 Difference]: Start difference. First operand has 180 places, 350 transitions, 3908 flow. Second operand 12 states and 307 transitions. [2023-11-29 02:53:30,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 495 transitions, 5774 flow [2023-11-29 02:53:43,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 495 transitions, 5195 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-11-29 02:53:43,536 INFO L231 Difference]: Finished difference. Result has 188 places, 372 transitions, 3831 flow [2023-11-29 02:53:43,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3831, PETRI_PLACES=188, PETRI_TRANSITIONS=372} [2023-11-29 02:53:43,537 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 131 predicate places. [2023-11-29 02:53:43,537 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 372 transitions, 3831 flow [2023-11-29 02:53:43,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.882352941176471) internal successors, (253), 17 states have internal predecessors, (253), 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) [2023-11-29 02:53:43,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:53:43,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:53:43,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:53:43,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:53:43,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:53:43,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:53:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1510474227, now seen corresponding path program 2 times [2023-11-29 02:53:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:53:43,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685713424] [2023-11-29 02:53:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:53:43,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:53:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:53:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:53:44,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:53:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685713424] [2023-11-29 02:53:44,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685713424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:53:44,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963493310] [2023-11-29 02:53:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:53:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:53:44,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:53:44,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:53:44,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:53:44,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:53:44,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:53:44,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:53:44,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:53:44,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:53:44,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-29 02:53:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:44,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:53:44,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:53:44,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2023-11-29 02:53:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:53:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963493310] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:53:45,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:53:45,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2023-11-29 02:53:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664574304] [2023-11-29 02:53:45,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:53:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 02:53:45,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:53:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 02:53:45,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:53:45,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:53:45,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 372 transitions, 3831 flow. Second operand has 27 states, 27 states have (on average 14.518518518518519) internal successors, (392), 27 states have internal predecessors, (392), 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) [2023-11-29 02:53:45,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:53:45,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:53:45,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:54:04,037 INFO L124 PetriNetUnfolderBase]: 86188/119488 cut-off events. [2023-11-29 02:54:04,037 INFO L125 PetriNetUnfolderBase]: For 505550/505560 co-relation queries the response was YES. [2023-11-29 02:54:05,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443999 conditions, 119488 events. 86188/119488 cut-off events. For 505550/505560 co-relation queries the response was YES. Maximal size of possible extension queue 4955. Compared 882696 event pairs, 39893 based on Foata normal form. 5/102003 useless extension candidates. Maximal degree in co-relation 443943. Up to 103174 conditions per place. [2023-11-29 02:54:05,629 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 499 selfloop transitions, 100 changer transitions 6/612 dead transitions. [2023-11-29 02:54:05,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 612 transitions, 6357 flow [2023-11-29 02:54:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:54:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 02:54:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 500 transitions. [2023-11-29 02:54:05,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41118421052631576 [2023-11-29 02:54:05,631 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 500 transitions. [2023-11-29 02:54:05,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 500 transitions. [2023-11-29 02:54:05,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:54:05,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 500 transitions. [2023-11-29 02:54:05,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 26.31578947368421) internal successors, (500), 19 states have internal predecessors, (500), 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) [2023-11-29 02:54:05,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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) [2023-11-29 02:54:05,636 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 64.0) internal successors, (1280), 20 states have internal predecessors, (1280), 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) [2023-11-29 02:54:05,636 INFO L175 Difference]: Start difference. First operand has 188 places, 372 transitions, 3831 flow. Second operand 19 states and 500 transitions. [2023-11-29 02:54:05,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 612 transitions, 6357 flow [2023-11-29 02:54:13,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 612 transitions, 6294 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-29 02:54:13,380 INFO L231 Difference]: Finished difference. Result has 205 places, 407 transitions, 4516 flow [2023-11-29 02:54:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4516, PETRI_PLACES=205, PETRI_TRANSITIONS=407} [2023-11-29 02:54:13,381 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 148 predicate places. [2023-11-29 02:54:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 407 transitions, 4516 flow [2023-11-29 02:54:13,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 14.518518518518519) internal successors, (392), 27 states have internal predecessors, (392), 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) [2023-11-29 02:54:13,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:54:13,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:54:13,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:54:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:54:13,582 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:54:13,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:54:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1089272587, now seen corresponding path program 5 times [2023-11-29 02:54:13,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:54:13,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575798171] [2023-11-29 02:54:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:54:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:54:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:54:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:54:13,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:54:13,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575798171] [2023-11-29 02:54:13,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575798171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:54:13,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285693811] [2023-11-29 02:54:13,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:54:13,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:54:13,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:54:13,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:54:13,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:54:14,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:54:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:54:14,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 02:54:14,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:54:14,246 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 19 treesize of output 7 [2023-11-29 02:54:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:54:14,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:54:14,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:54:14,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2023-11-29 02:54:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:54:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285693811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:54:14,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:54:14,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2023-11-29 02:54:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329487069] [2023-11-29 02:54:14,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:54:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:54:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:54:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:54:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:54:14,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:54:14,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 407 transitions, 4516 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2023-11-29 02:54:14,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:54:14,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:54:14,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:54:34,159 INFO L124 PetriNetUnfolderBase]: 90430/125369 cut-off events. [2023-11-29 02:54:34,159 INFO L125 PetriNetUnfolderBase]: For 616672/616682 co-relation queries the response was YES. [2023-11-29 02:54:35,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481944 conditions, 125369 events. 90430/125369 cut-off events. For 616672/616682 co-relation queries the response was YES. Maximal size of possible extension queue 5323. Compared 932511 event pairs, 43373 based on Foata normal form. 5/107156 useless extension candidates. Maximal degree in co-relation 481884. Up to 110739 conditions per place. [2023-11-29 02:54:35,862 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 461 selfloop transitions, 74 changer transitions 4/546 dead transitions. [2023-11-29 02:54:35,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 546 transitions, 6351 flow [2023-11-29 02:54:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:54:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 02:54:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 316 transitions. [2023-11-29 02:54:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114583333333333 [2023-11-29 02:54:35,863 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 316 transitions. [2023-11-29 02:54:35,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 316 transitions. [2023-11-29 02:54:35,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:54:35,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 316 transitions. [2023-11-29 02:54:35,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.333333333333332) internal successors, (316), 12 states have internal predecessors, (316), 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) [2023-11-29 02:54:35,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 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) [2023-11-29 02:54:35,865 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 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) [2023-11-29 02:54:35,865 INFO L175 Difference]: Start difference. First operand has 205 places, 407 transitions, 4516 flow. Second operand 12 states and 316 transitions. [2023-11-29 02:54:35,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 546 transitions, 6351 flow [2023-11-29 02:54:45,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 546 transitions, 6126 flow, removed 102 selfloop flow, removed 7 redundant places. [2023-11-29 02:54:45,961 INFO L231 Difference]: Finished difference. Result has 211 places, 419 transitions, 4662 flow [2023-11-29 02:54:45,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4662, PETRI_PLACES=211, PETRI_TRANSITIONS=419} [2023-11-29 02:54:45,962 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 154 predicate places. [2023-11-29 02:54:45,962 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 419 transitions, 4662 flow [2023-11-29 02:54:45,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2023-11-29 02:54:45,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:54:45,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:54:45,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:54:46,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:54:46,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:54:46,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:54:46,163 INFO L85 PathProgramCache]: Analyzing trace with hash -208220397, now seen corresponding path program 6 times [2023-11-29 02:54:46,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:54:46,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130455126] [2023-11-29 02:54:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:54:46,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:54:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:54:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:54:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:54:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130455126] [2023-11-29 02:54:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130455126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:54:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626914845] [2023-11-29 02:54:46,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:54:46,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:54:46,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:54:46,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:54:46,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:54:46,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 02:54:46,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:54:46,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:54:46,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:54:46,720 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 19 treesize of output 1 [2023-11-29 02:54:46,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:54:46,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-29 02:54:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:54:47,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:54:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:54:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626914845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:54:47,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:54:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2023-11-29 02:54:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995751019] [2023-11-29 02:54:47,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:54:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:54:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:54:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:54:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:54:47,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:54:47,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 419 transitions, 4662 flow. Second operand has 24 states, 24 states have (on average 14.666666666666666) internal successors, (352), 24 states have internal predecessors, (352), 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) [2023-11-29 02:54:47,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:54:47,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:54:47,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:55:10,810 INFO L124 PetriNetUnfolderBase]: 99910/138793 cut-off events. [2023-11-29 02:55:10,810 INFO L125 PetriNetUnfolderBase]: For 706502/706512 co-relation queries the response was YES. [2023-11-29 02:55:12,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536505 conditions, 138793 events. 99910/138793 cut-off events. For 706502/706512 co-relation queries the response was YES. Maximal size of possible extension queue 6053. Compared 1051205 event pairs, 44489 based on Foata normal form. 8/118812 useless extension candidates. Maximal degree in co-relation 536443. Up to 117002 conditions per place. [2023-11-29 02:55:12,935 INFO L140 encePairwiseOnDemand]: 49/64 looper letters, 551 selfloop transitions, 109 changer transitions 14/681 dead transitions. [2023-11-29 02:55:12,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 681 transitions, 7491 flow [2023-11-29 02:55:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:55:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 02:55:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 540 transitions. [2023-11-29 02:55:12,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2023-11-29 02:55:12,937 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 540 transitions. [2023-11-29 02:55:12,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 540 transitions. [2023-11-29 02:55:12,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:55:12,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 540 transitions. [2023-11-29 02:55:12,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 25.714285714285715) internal successors, (540), 21 states have internal predecessors, (540), 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) [2023-11-29 02:55:12,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 64.0) internal successors, (1408), 22 states have internal predecessors, (1408), 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) [2023-11-29 02:55:12,940 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 64.0) internal successors, (1408), 22 states have internal predecessors, (1408), 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) [2023-11-29 02:55:12,940 INFO L175 Difference]: Start difference. First operand has 211 places, 419 transitions, 4662 flow. Second operand 21 states and 540 transitions. [2023-11-29 02:55:12,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 681 transitions, 7491 flow [2023-11-29 02:55:22,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 681 transitions, 7368 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-11-29 02:55:22,875 INFO L231 Difference]: Finished difference. Result has 232 places, 463 transitions, 5532 flow [2023-11-29 02:55:22,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5532, PETRI_PLACES=232, PETRI_TRANSITIONS=463} [2023-11-29 02:55:22,876 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 175 predicate places. [2023-11-29 02:55:22,876 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 463 transitions, 5532 flow [2023-11-29 02:55:22,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.666666666666666) internal successors, (352), 24 states have internal predecessors, (352), 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) [2023-11-29 02:55:22,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:55:22,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:22,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:55:23,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:55:23,077 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-29 02:55:23,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash -750245370, now seen corresponding path program 1 times [2023-11-29 02:55:23,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:23,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126327191] [2023-11-29 02:55:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:55:23,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126327191] [2023-11-29 02:55:23,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126327191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:55:23,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104894327] [2023-11-29 02:55:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:23,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:23,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:23,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:23,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38eb4472-4975-435d-a42e-9180fbc7c0ed/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:55:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:23,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:55:23,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:23,795 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 19 treesize of output 7 [2023-11-29 02:55:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:55:23,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:23,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:55:23,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2023-11-29 02:55:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:55:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104894327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:23,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:55:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 19 [2023-11-29 02:55:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444452015] [2023-11-29 02:55:23,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:55:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:55:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:55:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-29 02:55:23,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 463 transitions, 5532 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 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) [2023-11-29 02:55:23,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:55:23,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-29 02:55:23,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand