./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/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 a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:40:57,244 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:40:57,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:40:57,312 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:40:57,312 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:40:57,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:40:57,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:40:57,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:40:57,339 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:40:57,339 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:40:57,340 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:40:57,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:40:57,341 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:40:57,342 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:40:57,342 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:40:57,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:40:57,343 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:40:57,344 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:40:57,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:40:57,345 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:40:57,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:40:57,346 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:40:57,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:40:57,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:40:57,348 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:40:57,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:40:57,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:40:57,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:40:57,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:40:57,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:40:57,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:40:57,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:40:57,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:40:57,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:40:57,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:40:57,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:40:57,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:40:57,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:40:57,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:40:57,352 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:40:57,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:40:57,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:40:57,353 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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4f33aa2cc1f38311ba2397f8e50d98656063732fb966533fd95353a255f95b1 [2023-11-29 05:40:57,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:40:57,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:40:57,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:40:57,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:40:57,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:40:57,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-29 05:41:00,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:41:00,587 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:41:00,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2023-11-29 05:41:00,596 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/data/684455192/fa3e8b3cf4764387abc58ea507d08440/FLAG4a696851b [2023-11-29 05:41:00,608 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/data/684455192/fa3e8b3cf4764387abc58ea507d08440 [2023-11-29 05:41:00,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:41:00,611 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:41:00,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:41:00,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:41:00,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:41:00,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eb29d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00, skipping insertion in model container [2023-11-29 05:41:00,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,649 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:41:00,806 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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4249,4262] [2023-11-29 05:41:00,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:41:00,829 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:41:00,854 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_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4249,4262] [2023-11-29 05:41:00,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:41:00,868 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:41:00,868 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:41:00,875 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:41:00,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00 WrapperNode [2023-11-29 05:41:00,876 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:41:00,877 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:41:00,877 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:41:00,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:41:00,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,929 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 246 [2023-11-29 05:41:00,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:41:00,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:41:00,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:41:00,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:41:00,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,944 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,959 INFO L175 MemorySlicer]: Split 13 memory accesses to 5 slices as follows [2, 2, 2, 5, 2]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 05:41:00,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,972 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:41:00,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:41:00,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:41:00,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:41:00,987 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (1/1) ... [2023-11-29 05:41:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:41:01,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:01,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:41:01,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:41:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:41:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:41:01,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:41:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:41:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:41:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:41:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:41:01,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:41:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:41:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:41:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:41:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:41:01,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:41:01,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:41:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:41:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:41:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:41:01,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:41:01,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:41:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:41:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:41:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:41:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:41:01,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:41:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:41:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:41:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:41:01,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:41:01,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:41:01,072 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 05:41:01,208 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:41:01,210 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:41:01,531 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:41:01,852 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:41:01,853 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:41:01,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:41:01 BoogieIcfgContainer [2023-11-29 05:41:01,853 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:41:01,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:41:01,856 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:41:01,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:41:01,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:41:00" (1/3) ... [2023-11-29 05:41:01,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6030acf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:41:01, skipping insertion in model container [2023-11-29 05:41:01,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:41:00" (2/3) ... [2023-11-29 05:41:01,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6030acf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:41:01, skipping insertion in model container [2023-11-29 05:41:01,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:41:01" (3/3) ... [2023-11-29 05:41:01,863 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2023-11-29 05:41:01,873 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:41:01,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:41:01,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:41:01,885 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:41:01,939 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:41:01,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 119 flow [2023-11-29 05:41:02,017 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2023-11-29 05:41:02,017 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:41:02,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 1/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 05:41:02,020 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 119 flow [2023-11-29 05:41:02,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 108 flow [2023-11-29 05:41:02,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:41:02,041 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;@52f2eea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:41:02,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 05:41:02,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:41:02,060 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2023-11-29 05:41:02,060 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:41:02,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:02,061 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, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:02,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:02,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1897879560, now seen corresponding path program 1 times [2023-11-29 05:41:02,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:02,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464641455] [2023-11-29 05:41:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:02,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:02,572 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 05:41:02,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:02,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464641455] [2023-11-29 05:41:02,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464641455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:02,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:41:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:41:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930613580] [2023-11-29 05:41:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:02,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:41:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:02,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:41:02,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:41:02,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-29 05:41:02,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 05:41:02,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:02,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-29 05:41:02,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:02,913 INFO L124 PetriNetUnfolderBase]: 946/1665 cut-off events. [2023-11-29 05:41:02,913 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-29 05:41:02,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257 conditions, 1665 events. 946/1665 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9596 event pairs, 945 based on Foata normal form. 0/1628 useless extension candidates. Maximal degree in co-relation 2847. Up to 1465 conditions per place. [2023-11-29 05:41:02,932 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-11-29 05:41:02,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 170 flow [2023-11-29 05:41:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:41:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:41:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 05:41:02,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2023-11-29 05:41:02,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 05:41:02,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 05:41:02,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:02,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 05:41:02,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 05:41:02,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:41:02,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:41:02,954 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 108 flow. Second operand 3 states and 88 transitions. [2023-11-29 05:41:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 170 flow [2023-11-29 05:41:02,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 158 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:41:02,963 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 108 flow [2023-11-29 05:41:02,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-29 05:41:02,970 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-11-29 05:41:02,970 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 108 flow [2023-11-29 05:41:02,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 05:41:02,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:02,971 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:41:02,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1408818239, now seen corresponding path program 1 times [2023-11-29 05:41:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:02,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75245796] [2023-11-29 05:41:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:41:03,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:03,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75245796] [2023-11-29 05:41:03,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75245796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:03,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:41:03,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:41:03,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062689060] [2023-11-29 05:41:03,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:03,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:41:03,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:03,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:41:03,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:41:03,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:41:03,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:41:03,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:03,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:41:03,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:04,249 INFO L124 PetriNetUnfolderBase]: 3950/6503 cut-off events. [2023-11-29 05:41:04,249 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-29 05:41:04,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12653 conditions, 6503 events. 3950/6503 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 40753 event pairs, 737 based on Foata normal form. 60/6545 useless extension candidates. Maximal degree in co-relation 12642. Up to 1730 conditions per place. [2023-11-29 05:41:04,300 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 133 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2023-11-29 05:41:04,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 159 transitions, 646 flow [2023-11-29 05:41:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:41:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:41:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2023-11-29 05:41:04,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2023-11-29 05:41:04,305 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 266 transitions. [2023-11-29 05:41:04,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 266 transitions. [2023-11-29 05:41:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:04,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 266 transitions. [2023-11-29 05:41:04,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 29.555555555555557) internal successors, (266), 9 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:04,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:41:04,311 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:41:04,312 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 108 flow. Second operand 9 states and 266 transitions. [2023-11-29 05:41:04,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 159 transitions, 646 flow [2023-11-29 05:41:04,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 159 transitions, 642 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 05:41:04,317 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 200 flow [2023-11-29 05:41:04,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-29 05:41:04,318 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2023-11-29 05:41:04,318 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 200 flow [2023-11-29 05:41:04,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:41:04,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:04,319 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:04,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:41:04,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:04,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2077458203, now seen corresponding path program 2 times [2023-11-29 05:41:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728301811] [2023-11-29 05:41:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728301811] [2023-11-29 05:41:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728301811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435611502] [2023-11-29 05:41:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:41:05,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:05,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:05,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:05,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:41:05,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:41:05,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:05,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:41:05,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:05,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:05,700 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:41:05,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435611502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:05,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:05,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-29 05:41:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540199501] [2023-11-29 05:41:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:05,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:41:05,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:06,913 INFO L124 PetriNetUnfolderBase]: 4647/7596 cut-off events. [2023-11-29 05:41:06,913 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2023-11-29 05:41:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15704 conditions, 7596 events. 4647/7596 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 49658 event pairs, 901 based on Foata normal form. 2/7434 useless extension candidates. Maximal degree in co-relation 15683. Up to 4017 conditions per place. [2023-11-29 05:41:06,967 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 98 selfloop transitions, 18 changer transitions 8/152 dead transitions. [2023-11-29 05:41:06,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 648 flow [2023-11-29 05:41:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:41:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:41:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2023-11-29 05:41:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-29 05:41:06,970 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 294 transitions. [2023-11-29 05:41:06,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 294 transitions. [2023-11-29 05:41:06,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:06,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 294 transitions. [2023-11-29 05:41:06,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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 05:41:06,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:06,976 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:06,976 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 200 flow. Second operand 10 states and 294 transitions. [2023-11-29 05:41:06,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 648 flow [2023-11-29 05:41:06,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 152 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:41:06,992 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 297 flow [2023-11-29 05:41:06,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=297, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2023-11-29 05:41:06,993 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2023-11-29 05:41:06,993 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 297 flow [2023-11-29 05:41:06,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:06,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:06,994 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:07,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:41:07,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:07,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash 332169557, now seen corresponding path program 3 times [2023-11-29 05:41:07,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:07,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752438118] [2023-11-29 05:41:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:07,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:07,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752438118] [2023-11-29 05:41:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752438118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384952624] [2023-11-29 05:41:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:41:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:07,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:07,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:41:08,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:41:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:08,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:41:08,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:08,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:08,288 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:41:08,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:08,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384952624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:08,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:08,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-29 05:41:08,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208374188] [2023-11-29 05:41:08,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:41:08,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:08,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 297 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:08,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:08,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:08,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:10,680 INFO L124 PetriNetUnfolderBase]: 7911/13094 cut-off events. [2023-11-29 05:41:10,680 INFO L125 PetriNetUnfolderBase]: For 3508/3508 co-relation queries the response was YES. [2023-11-29 05:41:10,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30466 conditions, 13094 events. 7911/13094 cut-off events. For 3508/3508 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 95645 event pairs, 2376 based on Foata normal form. 2/12877 useless extension candidates. Maximal degree in co-relation 30439. Up to 6058 conditions per place. [2023-11-29 05:41:10,804 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 146 selfloop transitions, 25 changer transitions 10/209 dead transitions. [2023-11-29 05:41:10,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 209 transitions, 1039 flow [2023-11-29 05:41:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:41:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:41:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 342 transitions. [2023-11-29 05:41:10,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634508348794063 [2023-11-29 05:41:10,807 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 342 transitions. [2023-11-29 05:41:10,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 342 transitions. [2023-11-29 05:41:10,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:10,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 342 transitions. [2023-11-29 05:41:10,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 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 05:41:10,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:10,811 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:10,812 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 297 flow. Second operand 11 states and 342 transitions. [2023-11-29 05:41:10,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 209 transitions, 1039 flow [2023-11-29 05:41:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 209 transitions, 1039 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:41:10,849 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 519 flow [2023-11-29 05:41:10,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=519, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2023-11-29 05:41:10,850 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2023-11-29 05:41:10,850 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 519 flow [2023-11-29 05:41:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:10,851 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:10,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:41:11,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:11,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1782826855, now seen corresponding path program 4 times [2023-11-29 05:41:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620384647] [2023-11-29 05:41:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620384647] [2023-11-29 05:41:11,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620384647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310658482] [2023-11-29 05:41:11,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:41:11,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:11,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:11,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:41:11,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:41:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:11,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:41:11,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:12,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:12,050 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:41:12,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310658482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:12,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-29 05:41:12,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988633859] [2023-11-29 05:41:12,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:12,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:12,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:41:12,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:12,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:12,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:12,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:12,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:14,104 INFO L124 PetriNetUnfolderBase]: 8799/14824 cut-off events. [2023-11-29 05:41:14,104 INFO L125 PetriNetUnfolderBase]: For 12829/12829 co-relation queries the response was YES. [2023-11-29 05:41:14,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39150 conditions, 14824 events. 8799/14824 cut-off events. For 12829/12829 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 112290 event pairs, 2492 based on Foata normal form. 2/14562 useless extension candidates. Maximal degree in co-relation 39113. Up to 10385 conditions per place. [2023-11-29 05:41:14,221 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 107 selfloop transitions, 24 changer transitions 21/180 dead transitions. [2023-11-29 05:41:14,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 180 transitions, 1097 flow [2023-11-29 05:41:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:41:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:41:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 291 transitions. [2023-11-29 05:41:14,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938775510204082 [2023-11-29 05:41:14,223 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 291 transitions. [2023-11-29 05:41:14,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 291 transitions. [2023-11-29 05:41:14,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:14,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 291 transitions. [2023-11-29 05:41:14,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 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 05:41:14,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:14,226 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:14,226 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 519 flow. Second operand 10 states and 291 transitions. [2023-11-29 05:41:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 180 transitions, 1097 flow [2023-11-29 05:41:14,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 180 transitions, 1081 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-29 05:41:14,411 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 642 flow [2023-11-29 05:41:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=642, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2023-11-29 05:41:14,412 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2023-11-29 05:41:14,412 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 642 flow [2023-11-29 05:41:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:14,413 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:14,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:41:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:14,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1863072719, now seen corresponding path program 5 times [2023-11-29 05:41:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16969434] [2023-11-29 05:41:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16969434] [2023-11-29 05:41:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16969434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140774749] [2023-11-29 05:41:15,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:41:15,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:15,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:41:15,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:41:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:15,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:41:15,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:15,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:41:15,667 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 05:41:15,668 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 10 [2023-11-29 05:41:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:15,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:16,898 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 96 treesize of output 88 [2023-11-29 05:41:16,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:16,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 112 [2023-11-29 05:41:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140774749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:17,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:17,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2023-11-29 05:41:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452669335] [2023-11-29 05:41:17,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:17,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:41:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:41:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:41:17,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:17,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 642 flow. Second operand has 29 states, 29 states have (on average 20.03448275862069) internal successors, (581), 29 states have internal predecessors, (581), 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 05:41:17,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:17,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:17,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:22,725 INFO L124 PetriNetUnfolderBase]: 20800/35217 cut-off events. [2023-11-29 05:41:22,725 INFO L125 PetriNetUnfolderBase]: For 37266/37266 co-relation queries the response was YES. [2023-11-29 05:41:22,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95042 conditions, 35217 events. 20800/35217 cut-off events. For 37266/37266 co-relation queries the response was YES. Maximal size of possible extension queue 1709. Compared 306523 event pairs, 6140 based on Foata normal form. 28/34735 useless extension candidates. Maximal degree in co-relation 94931. Up to 12658 conditions per place. [2023-11-29 05:41:22,961 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 80 selfloop transitions, 9 changer transitions 365/482 dead transitions. [2023-11-29 05:41:22,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 482 transitions, 3320 flow [2023-11-29 05:41:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:41:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 05:41:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 811 transitions. [2023-11-29 05:41:22,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911078717201166 [2023-11-29 05:41:22,965 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 811 transitions. [2023-11-29 05:41:22,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 811 transitions. [2023-11-29 05:41:22,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:22,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 811 transitions. [2023-11-29 05:41:22,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 28.964285714285715) internal successors, (811), 28 states have internal predecessors, (811), 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 05:41:22,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 49.0) internal successors, (1421), 29 states have internal predecessors, (1421), 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 05:41:22,972 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 49.0) internal successors, (1421), 29 states have internal predecessors, (1421), 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 05:41:22,972 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 642 flow. Second operand 28 states and 811 transitions. [2023-11-29 05:41:22,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 482 transitions, 3320 flow [2023-11-29 05:41:24,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 482 transitions, 3126 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-11-29 05:41:24,236 INFO L231 Difference]: Finished difference. Result has 151 places, 107 transitions, 804 flow [2023-11-29 05:41:24,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=804, PETRI_PLACES=151, PETRI_TRANSITIONS=107} [2023-11-29 05:41:24,237 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 97 predicate places. [2023-11-29 05:41:24,237 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 107 transitions, 804 flow [2023-11-29 05:41:24,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.03448275862069) internal successors, (581), 29 states have internal predecessors, (581), 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 05:41:24,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:24,238 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, 1, 1, 1] [2023-11-29 05:41:24,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:41:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:24,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:24,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 997746738, now seen corresponding path program 6 times [2023-11-29 05:41:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:24,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623888966] [2023-11-29 05:41:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:26,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623888966] [2023-11-29 05:41:26,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623888966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:26,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169220162] [2023-11-29 05:41:26,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:41:26,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:26,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:26,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:26,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:41:26,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 05:41:26,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:26,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:41:26,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:27,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:27,189 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:27,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:27,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169220162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:27,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:27,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2023-11-29 05:41:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690363472] [2023-11-29 05:41:27,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:27,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:27,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:41:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:27,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 107 transitions, 804 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:27,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:27,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:30,094 INFO L124 PetriNetUnfolderBase]: 9787/16581 cut-off events. [2023-11-29 05:41:30,094 INFO L125 PetriNetUnfolderBase]: For 215120/215120 co-relation queries the response was YES. [2023-11-29 05:41:30,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86268 conditions, 16581 events. 9787/16581 cut-off events. For 215120/215120 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 129475 event pairs, 2978 based on Foata normal form. 2/16299 useless extension candidates. Maximal degree in co-relation 86200. Up to 10276 conditions per place. [2023-11-29 05:41:30,295 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 142 selfloop transitions, 35 changer transitions 10/215 dead transitions. [2023-11-29 05:41:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 215 transitions, 2036 flow [2023-11-29 05:41:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:41:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:41:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 330 transitions. [2023-11-29 05:41:30,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-29 05:41:30,297 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 330 transitions. [2023-11-29 05:41:30,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 330 transitions. [2023-11-29 05:41:30,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:30,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 330 transitions. [2023-11-29 05:41:30,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.0) internal successors, (330), 11 states have internal predecessors, (330), 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 05:41:30,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:30,301 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:30,301 INFO L175 Difference]: Start difference. First operand has 151 places, 107 transitions, 804 flow. Second operand 11 states and 330 transitions. [2023-11-29 05:41:30,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 215 transitions, 2036 flow [2023-11-29 05:41:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 1744 flow, removed 142 selfloop flow, removed 12 redundant places. [2023-11-29 05:41:30,747 INFO L231 Difference]: Finished difference. Result has 132 places, 124 transitions, 1067 flow [2023-11-29 05:41:30,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1067, PETRI_PLACES=132, PETRI_TRANSITIONS=124} [2023-11-29 05:41:30,748 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2023-11-29 05:41:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 124 transitions, 1067 flow [2023-11-29 05:41:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:30,748 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, 1, 1, 1] [2023-11-29 05:41:30,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:41:30,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:41:30,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:30,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash -719003654, now seen corresponding path program 7 times [2023-11-29 05:41:30,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957177105] [2023-11-29 05:41:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:33,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957177105] [2023-11-29 05:41:33,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957177105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:33,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614479265] [2023-11-29 05:41:33,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:41:33,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:33,280 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:33,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:41:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:33,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:41:33,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:33,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:33,683 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:41:33,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:33,949 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:41:33,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:41:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:34,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614479265] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:34,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:41:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 25 [2023-11-29 05:41:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658032843] [2023-11-29 05:41:34,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:41:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:34,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 124 transitions, 1067 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:37,787 INFO L124 PetriNetUnfolderBase]: 12693/21711 cut-off events. [2023-11-29 05:41:37,788 INFO L125 PetriNetUnfolderBase]: For 134265/134265 co-relation queries the response was YES. [2023-11-29 05:41:37,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93662 conditions, 21711 events. 12693/21711 cut-off events. For 134265/134265 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 178486 event pairs, 3851 based on Foata normal form. 2/21390 useless extension candidates. Maximal degree in co-relation 93600. Up to 10720 conditions per place. [2023-11-29 05:41:38,025 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 220 selfloop transitions, 63 changer transitions 6/317 dead transitions. [2023-11-29 05:41:38,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 317 transitions, 3069 flow [2023-11-29 05:41:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:41:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:41:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 520 transitions. [2023-11-29 05:41:38,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242496998799519 [2023-11-29 05:41:38,028 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 520 transitions. [2023-11-29 05:41:38,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 520 transitions. [2023-11-29 05:41:38,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:38,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 520 transitions. [2023-11-29 05:41:38,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 30.58823529411765) internal successors, (520), 17 states have internal predecessors, (520), 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 05:41:38,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:41:38,033 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:41:38,033 INFO L175 Difference]: Start difference. First operand has 132 places, 124 transitions, 1067 flow. Second operand 17 states and 520 transitions. [2023-11-29 05:41:38,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 317 transitions, 3069 flow [2023-11-29 05:41:38,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 317 transitions, 2862 flow, removed 99 selfloop flow, removed 1 redundant places. [2023-11-29 05:41:38,916 INFO L231 Difference]: Finished difference. Result has 152 places, 155 transitions, 1574 flow [2023-11-29 05:41:38,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1574, PETRI_PLACES=152, PETRI_TRANSITIONS=155} [2023-11-29 05:41:38,917 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 98 predicate places. [2023-11-29 05:41:38,917 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 155 transitions, 1574 flow [2023-11-29 05:41:38,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:38,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:38,918 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, 1, 1, 1] [2023-11-29 05:41:38,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:41:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 05:41:39,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:39,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:39,119 INFO L85 PathProgramCache]: Analyzing trace with hash 139898560, now seen corresponding path program 8 times [2023-11-29 05:41:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084287925] [2023-11-29 05:41:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084287925] [2023-11-29 05:41:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084287925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322939537] [2023-11-29 05:41:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:41:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:42,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:42,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:41:42,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:41:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:42,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:41:42,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:42,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:42,564 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:42,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322939537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:42,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:42,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:41:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132538390] [2023-11-29 05:41:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:42,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:42,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:41:42,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:42,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 155 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:45,883 INFO L124 PetriNetUnfolderBase]: 12655/21625 cut-off events. [2023-11-29 05:41:45,883 INFO L125 PetriNetUnfolderBase]: For 137168/137168 co-relation queries the response was YES. [2023-11-29 05:41:46,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94856 conditions, 21625 events. 12655/21625 cut-off events. For 137168/137168 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 178054 event pairs, 4800 based on Foata normal form. 2/21255 useless extension candidates. Maximal degree in co-relation 94788. Up to 15414 conditions per place. [2023-11-29 05:41:46,124 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 131 selfloop transitions, 38 changer transitions 39/236 dead transitions. [2023-11-29 05:41:46,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 236 transitions, 2399 flow [2023-11-29 05:41:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:41:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:41:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 303 transitions. [2023-11-29 05:41:46,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6183673469387755 [2023-11-29 05:41:46,126 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 303 transitions. [2023-11-29 05:41:46,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 303 transitions. [2023-11-29 05:41:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:46,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 303 transitions. [2023-11-29 05:41:46,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 30.3) internal successors, (303), 10 states have internal predecessors, (303), 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 05:41:46,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:46,130 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:41:46,130 INFO L175 Difference]: Start difference. First operand has 152 places, 155 transitions, 1574 flow. Second operand 10 states and 303 transitions. [2023-11-29 05:41:46,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 236 transitions, 2399 flow [2023-11-29 05:41:46,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 2272 flow, removed 45 selfloop flow, removed 3 redundant places. [2023-11-29 05:41:46,977 INFO L231 Difference]: Finished difference. Result has 159 places, 146 transitions, 1441 flow [2023-11-29 05:41:46,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1441, PETRI_PLACES=159, PETRI_TRANSITIONS=146} [2023-11-29 05:41:46,978 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-11-29 05:41:46,978 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 146 transitions, 1441 flow [2023-11-29 05:41:46,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:46,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:46,978 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, 1, 1, 1] [2023-11-29 05:41:46,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:41:47,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:41:47,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:47,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash -992765672, now seen corresponding path program 9 times [2023-11-29 05:41:47,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:47,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462730006] [2023-11-29 05:41:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462730006] [2023-11-29 05:41:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462730006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:47,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:41:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:41:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660529151] [2023-11-29 05:41:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:47,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:41:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:41:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:41:47,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:47,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 146 transitions, 1441 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 05:41:47,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:47,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:47,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:49,989 INFO L124 PetriNetUnfolderBase]: 11092/19399 cut-off events. [2023-11-29 05:41:49,989 INFO L125 PetriNetUnfolderBase]: For 129184/129442 co-relation queries the response was YES. [2023-11-29 05:41:50,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84468 conditions, 19399 events. 11092/19399 cut-off events. For 129184/129442 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 159668 event pairs, 9391 based on Foata normal form. 57/19023 useless extension candidates. Maximal degree in co-relation 84400. Up to 16603 conditions per place. [2023-11-29 05:41:50,314 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 129 selfloop transitions, 2 changer transitions 1/169 dead transitions. [2023-11-29 05:41:50,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 1932 flow [2023-11-29 05:41:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:41:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:41:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2023-11-29 05:41:50,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2023-11-29 05:41:50,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 96 transitions. [2023-11-29 05:41:50,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 96 transitions. [2023-11-29 05:41:50,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:50,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 96 transitions. [2023-11-29 05:41:50,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 05:41:50,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:41:50,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:41:50,317 INFO L175 Difference]: Start difference. First operand has 159 places, 146 transitions, 1441 flow. Second operand 3 states and 96 transitions. [2023-11-29 05:41:50,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 1932 flow [2023-11-29 05:41:50,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 169 transitions, 1855 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-29 05:41:50,919 INFO L231 Difference]: Finished difference. Result has 148 places, 146 transitions, 1383 flow [2023-11-29 05:41:50,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1383, PETRI_PLACES=148, PETRI_TRANSITIONS=146} [2023-11-29 05:41:50,919 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2023-11-29 05:41:50,919 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 146 transitions, 1383 flow [2023-11-29 05:41:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 05:41:50,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:50,920 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, 1, 1, 1] [2023-11-29 05:41:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:41:50,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:50,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:50,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1860478506, now seen corresponding path program 10 times [2023-11-29 05:41:50,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977425447] [2023-11-29 05:41:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:53,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977425447] [2023-11-29 05:41:53,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977425447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226489794] [2023-11-29 05:41:53,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:41:53,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:53,405 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:53,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:41:53,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:41:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:53,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:41:53,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:53,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:41:53,698 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:41:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:41:53,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:41:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226489794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:41:53,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:41:53,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2023-11-29 05:41:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536034305] [2023-11-29 05:41:53,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:41:53,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:41:53,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:41:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:41:53,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:41:53,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 146 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:53,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:53,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:41:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:56,954 INFO L124 PetriNetUnfolderBase]: 12190/20692 cut-off events. [2023-11-29 05:41:56,954 INFO L125 PetriNetUnfolderBase]: For 128838/128849 co-relation queries the response was YES. [2023-11-29 05:41:57,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91160 conditions, 20692 events. 12190/20692 cut-off events. For 128838/128849 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 168611 event pairs, 5085 based on Foata normal form. 2/20369 useless extension candidates. Maximal degree in co-relation 91093. Up to 15920 conditions per place. [2023-11-29 05:41:57,187 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 25 changer transitions 19/245 dead transitions. [2023-11-29 05:41:57,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 245 transitions, 2413 flow [2023-11-29 05:41:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:41:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:41:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 324 transitions. [2023-11-29 05:41:57,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601113172541744 [2023-11-29 05:41:57,189 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 324 transitions. [2023-11-29 05:41:57,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 324 transitions. [2023-11-29 05:41:57,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:57,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 324 transitions. [2023-11-29 05:41:57,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 29.454545454545453) internal successors, (324), 11 states have internal predecessors, (324), 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 05:41:57,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:57,192 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:41:57,192 INFO L175 Difference]: Start difference. First operand has 148 places, 146 transitions, 1383 flow. Second operand 11 states and 324 transitions. [2023-11-29 05:41:57,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 245 transitions, 2413 flow [2023-11-29 05:41:57,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 245 transitions, 2409 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:41:57,919 INFO L231 Difference]: Finished difference. Result has 159 places, 158 transitions, 1664 flow [2023-11-29 05:41:57,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1664, PETRI_PLACES=159, PETRI_TRANSITIONS=158} [2023-11-29 05:41:57,920 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2023-11-29 05:41:57,920 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 158 transitions, 1664 flow [2023-11-29 05:41:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:41:57,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:57,920 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, 1, 1, 1] [2023-11-29 05:41:57,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:41:58,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:41:58,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:41:58,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 764857994, now seen corresponding path program 11 times [2023-11-29 05:41:58,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:58,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483438392] [2023-11-29 05:41:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:59,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483438392] [2023-11-29 05:41:59,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483438392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:59,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858521653] [2023-11-29 05:41:59,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:41:59,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:59,741 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:59,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:41:59,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:41:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:59,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:41:59,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:00,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:00,082 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:42:00,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:00,286 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:42:00,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:42:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:00,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858521653] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:00,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:42:00,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 24 [2023-11-29 05:42:00,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281652466] [2023-11-29 05:42:00,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:00,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:00,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:42:00,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:00,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 158 transitions, 1664 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:04,347 INFO L124 PetriNetUnfolderBase]: 13301/22969 cut-off events. [2023-11-29 05:42:04,347 INFO L125 PetriNetUnfolderBase]: For 146940/146951 co-relation queries the response was YES. [2023-11-29 05:42:04,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101155 conditions, 22969 events. 13301/22969 cut-off events. For 146940/146951 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 191790 event pairs, 4250 based on Foata normal form. 2/22650 useless extension candidates. Maximal degree in co-relation 101085. Up to 11286 conditions per place. [2023-11-29 05:42:04,654 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 263 selfloop transitions, 62 changer transitions 1/354 dead transitions. [2023-11-29 05:42:04,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 354 transitions, 3476 flow [2023-11-29 05:42:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:42:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:42:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 597 transitions. [2023-11-29 05:42:04,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091836734693877 [2023-11-29 05:42:04,658 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 597 transitions. [2023-11-29 05:42:04,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 597 transitions. [2023-11-29 05:42:04,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:04,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 597 transitions. [2023-11-29 05:42:04,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 29.85) internal successors, (597), 20 states have internal predecessors, (597), 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 05:42:04,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 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 05:42:04,664 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 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 05:42:04,664 INFO L175 Difference]: Start difference. First operand has 159 places, 158 transitions, 1664 flow. Second operand 20 states and 597 transitions. [2023-11-29 05:42:04,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 354 transitions, 3476 flow [2023-11-29 05:42:05,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 354 transitions, 3310 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-11-29 05:42:05,746 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 1787 flow [2023-11-29 05:42:05,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1787, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2023-11-29 05:42:05,747 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2023-11-29 05:42:05,747 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 1787 flow [2023-11-29 05:42:05,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:05,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:05,748 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, 1, 1, 1] [2023-11-29 05:42:05,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:42:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:42:05,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:05,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash 637750376, now seen corresponding path program 12 times [2023-11-29 05:42:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169867533] [2023-11-29 05:42:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169867533] [2023-11-29 05:42:06,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169867533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:06,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420813699] [2023-11-29 05:42:06,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:42:06,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:06,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:06,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:06,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:42:07,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 05:42:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:07,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:42:07,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:07,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:07,299 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:07,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:42:07,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420813699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:42:07,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:42:07,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:42:07,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339573747] [2023-11-29 05:42:07,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:07,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:42:07,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:07,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:07,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:07,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:07,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:11,084 INFO L124 PetriNetUnfolderBase]: 13598/23340 cut-off events. [2023-11-29 05:42:11,084 INFO L125 PetriNetUnfolderBase]: For 147612/147623 co-relation queries the response was YES. [2023-11-29 05:42:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103599 conditions, 23340 events. 13598/23340 cut-off events. For 147612/147623 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 196552 event pairs, 6009 based on Foata normal form. 2/22991 useless extension candidates. Maximal degree in co-relation 103525. Up to 17878 conditions per place. [2023-11-29 05:42:11,374 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 189 selfloop transitions, 27 changer transitions 10/254 dead transitions. [2023-11-29 05:42:11,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 2638 flow [2023-11-29 05:42:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:42:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:42:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 304 transitions. [2023-11-29 05:42:11,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2023-11-29 05:42:11,375 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 304 transitions. [2023-11-29 05:42:11,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 304 transitions. [2023-11-29 05:42:11,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:11,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 304 transitions. [2023-11-29 05:42:11,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 30.4) internal successors, (304), 10 states have internal predecessors, (304), 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 05:42:11,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:42:11,378 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:42:11,378 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 1787 flow. Second operand 10 states and 304 transitions. [2023-11-29 05:42:11,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 2638 flow [2023-11-29 05:42:12,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 254 transitions, 2497 flow, removed 37 selfloop flow, removed 8 redundant places. [2023-11-29 05:42:12,325 INFO L231 Difference]: Finished difference. Result has 181 places, 170 transitions, 1755 flow [2023-11-29 05:42:12,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1755, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2023-11-29 05:42:12,325 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-11-29 05:42:12,325 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 1755 flow [2023-11-29 05:42:12,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:12,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:12,326 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, 1, 1, 1] [2023-11-29 05:42:12,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:42:12,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:12,527 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:12,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:12,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1129392492, now seen corresponding path program 13 times [2023-11-29 05:42:12,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:12,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930578475] [2023-11-29 05:42:12,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:12,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930578475] [2023-11-29 05:42:13,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930578475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:13,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433973880] [2023-11-29 05:42:13,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:42:13,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:13,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:13,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:13,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:42:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:14,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:42:14,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:14,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:14,272 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:42:14,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:14,441 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:42:14,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:42:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:14,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433973880] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:14,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:42:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 24 [2023-11-29 05:42:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358724528] [2023-11-29 05:42:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:42:14,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:14,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 1755 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:14,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:14,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:14,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:18,666 INFO L124 PetriNetUnfolderBase]: 14422/25054 cut-off events. [2023-11-29 05:42:18,666 INFO L125 PetriNetUnfolderBase]: For 156383/156394 co-relation queries the response was YES. [2023-11-29 05:42:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108262 conditions, 25054 events. 14422/25054 cut-off events. For 156383/156394 co-relation queries the response was YES. Maximal size of possible extension queue 1392. Compared 214485 event pairs, 5324 based on Foata normal form. 4/24711 useless extension candidates. Maximal degree in co-relation 108188. Up to 14614 conditions per place. [2023-11-29 05:42:18,980 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 222 selfloop transitions, 52 changer transitions 36/338 dead transitions. [2023-11-29 05:42:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 338 transitions, 3409 flow [2023-11-29 05:42:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:42:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:42:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 518 transitions. [2023-11-29 05:42:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2023-11-29 05:42:18,982 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 518 transitions. [2023-11-29 05:42:18,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 518 transitions. [2023-11-29 05:42:18,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:18,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 518 transitions. [2023-11-29 05:42:18,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 30.470588235294116) internal successors, (518), 17 states have internal predecessors, (518), 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 05:42:18,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:42:18,985 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:42:18,985 INFO L175 Difference]: Start difference. First operand has 181 places, 170 transitions, 1755 flow. Second operand 17 states and 518 transitions. [2023-11-29 05:42:18,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 338 transitions, 3409 flow [2023-11-29 05:42:19,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 338 transitions, 3292 flow, removed 34 selfloop flow, removed 8 redundant places. [2023-11-29 05:42:19,874 INFO L231 Difference]: Finished difference. Result has 192 places, 171 transitions, 1918 flow [2023-11-29 05:42:19,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1918, PETRI_PLACES=192, PETRI_TRANSITIONS=171} [2023-11-29 05:42:19,875 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 138 predicate places. [2023-11-29 05:42:19,875 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 171 transitions, 1918 flow [2023-11-29 05:42:19,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:19,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:19,875 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, 1, 1, 1] [2023-11-29 05:42:19,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:42:20,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:20,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:20,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1757024536, now seen corresponding path program 14 times [2023-11-29 05:42:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:20,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628751288] [2023-11-29 05:42:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628751288] [2023-11-29 05:42:21,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628751288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374560841] [2023-11-29 05:42:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:42:21,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:21,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:21,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:42:21,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:42:21,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:21,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:42:21,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:21,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:21,945 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:21,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:42:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374560841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:42:21,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:42:21,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:42:21,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66982986] [2023-11-29 05:42:21,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:21,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:21,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:42:21,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:21,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 171 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:21,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:21,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:21,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:25,571 INFO L124 PetriNetUnfolderBase]: 13579/23449 cut-off events. [2023-11-29 05:42:25,571 INFO L125 PetriNetUnfolderBase]: For 153408/153419 co-relation queries the response was YES. [2023-11-29 05:42:25,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103432 conditions, 23449 events. 13579/23449 cut-off events. For 153408/153419 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 198292 event pairs, 6393 based on Foata normal form. 2/23094 useless extension candidates. Maximal degree in co-relation 103357. Up to 18155 conditions per place. [2023-11-29 05:42:26,017 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 206 selfloop transitions, 29 changer transitions 7/270 dead transitions. [2023-11-29 05:42:26,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 270 transitions, 2894 flow [2023-11-29 05:42:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:42:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:42:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 335 transitions. [2023-11-29 05:42:26,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62152133580705 [2023-11-29 05:42:26,019 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 335 transitions. [2023-11-29 05:42:26,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 335 transitions. [2023-11-29 05:42:26,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:26,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 335 transitions. [2023-11-29 05:42:26,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.454545454545453) internal successors, (335), 11 states have internal predecessors, (335), 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 05:42:26,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:42:26,022 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:42:26,022 INFO L175 Difference]: Start difference. First operand has 192 places, 171 transitions, 1918 flow. Second operand 11 states and 335 transitions. [2023-11-29 05:42:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 270 transitions, 2894 flow [2023-11-29 05:42:27,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 270 transitions, 2728 flow, removed 53 selfloop flow, removed 12 redundant places. [2023-11-29 05:42:27,130 INFO L231 Difference]: Finished difference. Result has 187 places, 175 transitions, 1902 flow [2023-11-29 05:42:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1902, PETRI_PLACES=187, PETRI_TRANSITIONS=175} [2023-11-29 05:42:27,131 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 133 predicate places. [2023-11-29 05:42:27,131 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 175 transitions, 1902 flow [2023-11-29 05:42:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:27,131 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, 1, 1, 1] [2023-11-29 05:42:27,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 05:42:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:42:27,332 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:27,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash -465363426, now seen corresponding path program 15 times [2023-11-29 05:42:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:27,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675137695] [2023-11-29 05:42:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:28,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:28,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675137695] [2023-11-29 05:42:28,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675137695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:28,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829681478] [2023-11-29 05:42:28,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:42:28,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:28,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:28,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:42:29,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:42:29,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:29,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:42:29,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:29,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:29,167 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:29,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:42:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829681478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:42:29,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:42:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:42:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233886241] [2023-11-29 05:42:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:29,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:42:29,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 175 transitions, 1902 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:32,824 INFO L124 PetriNetUnfolderBase]: 13720/23686 cut-off events. [2023-11-29 05:42:32,824 INFO L125 PetriNetUnfolderBase]: For 143236/143247 co-relation queries the response was YES. [2023-11-29 05:42:33,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103034 conditions, 23686 events. 13720/23686 cut-off events. For 143236/143247 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 201309 event pairs, 6093 based on Foata normal form. 2/23346 useless extension candidates. Maximal degree in co-relation 102961. Up to 18728 conditions per place. [2023-11-29 05:42:33,114 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 185 selfloop transitions, 28 changer transitions 13/254 dead transitions. [2023-11-29 05:42:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 254 transitions, 2684 flow [2023-11-29 05:42:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:42:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:42:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2023-11-29 05:42:33,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2023-11-29 05:42:33,115 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 282 transitions. [2023-11-29 05:42:33,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 282 transitions. [2023-11-29 05:42:33,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:33,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 282 transitions. [2023-11-29 05:42:33,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 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 05:42:33,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:42:33,117 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:42:33,117 INFO L175 Difference]: Start difference. First operand has 187 places, 175 transitions, 1902 flow. Second operand 9 states and 282 transitions. [2023-11-29 05:42:33,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 254 transitions, 2684 flow [2023-11-29 05:42:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 2594 flow, removed 18 selfloop flow, removed 6 redundant places. [2023-11-29 05:42:33,997 INFO L231 Difference]: Finished difference. Result has 190 places, 175 transitions, 1887 flow [2023-11-29 05:42:33,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1887, PETRI_PLACES=190, PETRI_TRANSITIONS=175} [2023-11-29 05:42:33,997 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 136 predicate places. [2023-11-29 05:42:33,998 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 175 transitions, 1887 flow [2023-11-29 05:42:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:33,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:33,998 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, 1, 1, 1] [2023-11-29 05:42:34,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:42:34,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:42:34,199 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:34,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:34,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2035426746, now seen corresponding path program 16 times [2023-11-29 05:42:34,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:34,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068885732] [2023-11-29 05:42:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:34,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:35,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068885732] [2023-11-29 05:42:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068885732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895868107] [2023-11-29 05:42:35,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:42:35,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:35,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:35,439 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:35,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:42:35,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:42:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:35,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:42:35,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:35,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:35,667 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:35,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:42:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895868107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:42:35,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:42:35,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:42:35,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794200042] [2023-11-29 05:42:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:35,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:35,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:42:35,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:35,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 175 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:35,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:35,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:35,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:39,590 INFO L124 PetriNetUnfolderBase]: 13902/24046 cut-off events. [2023-11-29 05:42:39,590 INFO L125 PetriNetUnfolderBase]: For 142967/142978 co-relation queries the response was YES. [2023-11-29 05:42:39,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103668 conditions, 24046 events. 13902/24046 cut-off events. For 142967/142978 co-relation queries the response was YES. Maximal size of possible extension queue 1370. Compared 205269 event pairs, 5925 based on Foata normal form. 2/23704 useless extension candidates. Maximal degree in co-relation 103595. Up to 18062 conditions per place. [2023-11-29 05:42:39,876 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 156 selfloop transitions, 16 changer transitions 93/291 dead transitions. [2023-11-29 05:42:39,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 291 transitions, 2931 flow [2023-11-29 05:42:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:42:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:42:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 390 transitions. [2023-11-29 05:42:39,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-29 05:42:39,878 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 390 transitions. [2023-11-29 05:42:39,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 390 transitions. [2023-11-29 05:42:39,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:39,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 390 transitions. [2023-11-29 05:42:39,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.0) internal successors, (390), 13 states have internal predecessors, (390), 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 05:42:39,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 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 05:42:39,880 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 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 05:42:39,880 INFO L175 Difference]: Start difference. First operand has 190 places, 175 transitions, 1887 flow. Second operand 13 states and 390 transitions. [2023-11-29 05:42:39,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 291 transitions, 2931 flow [2023-11-29 05:42:40,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 291 transitions, 2875 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-29 05:42:40,717 INFO L231 Difference]: Finished difference. Result has 196 places, 155 transitions, 1630 flow [2023-11-29 05:42:40,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1630, PETRI_PLACES=196, PETRI_TRANSITIONS=155} [2023-11-29 05:42:40,717 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2023-11-29 05:42:40,717 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 155 transitions, 1630 flow [2023-11-29 05:42:40,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:40,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:40,717 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, 1, 1, 1] [2023-11-29 05:42:40,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:42:40,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:42:40,918 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:40,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1845913290, now seen corresponding path program 17 times [2023-11-29 05:42:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524070090] [2023-11-29 05:42:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524070090] [2023-11-29 05:42:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524070090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286501959] [2023-11-29 05:42:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:42:42,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:42,270 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:42,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:42:42,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:42:42,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:42,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:42:42,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:42,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:42,574 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:42:42,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:42,698 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:42:42,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:42:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:42,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286501959] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:42,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:42:42,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 9] total 23 [2023-11-29 05:42:42,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018834009] [2023-11-29 05:42:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:42,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:42,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:42:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:42,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 155 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:42,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:42,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:42,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:46,351 INFO L124 PetriNetUnfolderBase]: 12797/22407 cut-off events. [2023-11-29 05:42:46,351 INFO L125 PetriNetUnfolderBase]: For 127443/127454 co-relation queries the response was YES. [2023-11-29 05:42:46,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94026 conditions, 22407 events. 12797/22407 cut-off events. For 127443/127454 co-relation queries the response was YES. Maximal size of possible extension queue 1315. Compared 190890 event pairs, 4099 based on Foata normal form. 2/22063 useless extension candidates. Maximal degree in co-relation 93951. Up to 14130 conditions per place. [2023-11-29 05:42:46,641 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 168 selfloop transitions, 54 changer transitions 21/269 dead transitions. [2023-11-29 05:42:46,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 269 transitions, 2766 flow [2023-11-29 05:42:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:42:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:42:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 380 transitions. [2023-11-29 05:42:46,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965463108320251 [2023-11-29 05:42:46,643 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 380 transitions. [2023-11-29 05:42:46,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 380 transitions. [2023-11-29 05:42:46,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:46,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 380 transitions. [2023-11-29 05:42:46,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 29.23076923076923) internal successors, (380), 13 states have internal predecessors, (380), 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 05:42:46,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 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 05:42:46,646 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 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 05:42:46,646 INFO L175 Difference]: Start difference. First operand has 196 places, 155 transitions, 1630 flow. Second operand 13 states and 380 transitions. [2023-11-29 05:42:46,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 269 transitions, 2766 flow [2023-11-29 05:42:47,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 269 transitions, 2624 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-11-29 05:42:47,340 INFO L231 Difference]: Finished difference. Result has 176 places, 166 transitions, 1767 flow [2023-11-29 05:42:47,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1767, PETRI_PLACES=176, PETRI_TRANSITIONS=166} [2023-11-29 05:42:47,341 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2023-11-29 05:42:47,341 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 166 transitions, 1767 flow [2023-11-29 05:42:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:47,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:47,341 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, 1, 1, 1] [2023-11-29 05:42:47,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:42:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:42:47,542 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:47,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 68398610, now seen corresponding path program 18 times [2023-11-29 05:42:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422263858] [2023-11-29 05:42:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422263858] [2023-11-29 05:42:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422263858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903655411] [2023-11-29 05:42:48,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:42:48,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:48,427 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:48,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:42:48,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 05:42:48,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:48,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:42:48,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:48,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:48,681 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:48,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:42:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903655411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:42:48,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:42:48,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:42:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529849438] [2023-11-29 05:42:48,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:48,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:48,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:42:48,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:48,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 166 transitions, 1767 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:48,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:48,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:48,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:52,509 INFO L124 PetriNetUnfolderBase]: 14532/25698 cut-off events. [2023-11-29 05:42:52,509 INFO L125 PetriNetUnfolderBase]: For 137783/137794 co-relation queries the response was YES. [2023-11-29 05:42:52,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104576 conditions, 25698 events. 14532/25698 cut-off events. For 137783/137794 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 226971 event pairs, 5605 based on Foata normal form. 2/25310 useless extension candidates. Maximal degree in co-relation 104507. Up to 15290 conditions per place. [2023-11-29 05:42:52,952 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 177 selfloop transitions, 52 changer transitions 10/265 dead transitions. [2023-11-29 05:42:52,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 265 transitions, 2872 flow [2023-11-29 05:42:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:42:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:42:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 326 transitions. [2023-11-29 05:42:52,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048237476808905 [2023-11-29 05:42:52,954 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 326 transitions. [2023-11-29 05:42:52,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 326 transitions. [2023-11-29 05:42:52,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:52,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 326 transitions. [2023-11-29 05:42:52,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 29.636363636363637) internal successors, (326), 11 states have internal predecessors, (326), 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 05:42:52,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:42:52,956 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:42:52,956 INFO L175 Difference]: Start difference. First operand has 176 places, 166 transitions, 1767 flow. Second operand 11 states and 326 transitions. [2023-11-29 05:42:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 265 transitions, 2872 flow [2023-11-29 05:42:53,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 265 transitions, 2736 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-11-29 05:42:53,640 INFO L231 Difference]: Finished difference. Result has 179 places, 175 transitions, 1915 flow [2023-11-29 05:42:53,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1915, PETRI_PLACES=179, PETRI_TRANSITIONS=175} [2023-11-29 05:42:53,640 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2023-11-29 05:42:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 175 transitions, 1915 flow [2023-11-29 05:42:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:53,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:53,641 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, 1, 1, 1] [2023-11-29 05:42:53,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:42:53,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:53,841 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:42:53,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2067589488, now seen corresponding path program 19 times [2023-11-29 05:42:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:53,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559364329] [2023-11-29 05:42:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:53,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:54,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559364329] [2023-11-29 05:42:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559364329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:54,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187632488] [2023-11-29 05:42:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:42:54,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:54,839 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:54,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:42:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:54,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:42:54,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:55,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:42:55,149 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:42:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:42:55,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:55,357 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:42:55,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:42:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:42:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187632488] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:55,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:42:55,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 25 [2023-11-29 05:42:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872826071] [2023-11-29 05:42:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:42:55,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:42:55,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:42:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:42:55,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:42:55,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 175 transitions, 1915 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:42:55,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:55,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:42:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:59,780 INFO L124 PetriNetUnfolderBase]: 14926/26578 cut-off events. [2023-11-29 05:42:59,780 INFO L125 PetriNetUnfolderBase]: For 138409/138420 co-relation queries the response was YES. [2023-11-29 05:43:00,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106867 conditions, 26578 events. 14926/26578 cut-off events. For 138409/138420 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 237376 event pairs, 6023 based on Foata normal form. 2/26229 useless extension candidates. Maximal degree in co-relation 106797. Up to 16432 conditions per place. [2023-11-29 05:43:00,100 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 59 changer transitions 4/318 dead transitions. [2023-11-29 05:43:00,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 318 transitions, 3332 flow [2023-11-29 05:43:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:43:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 05:43:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 501 transitions. [2023-11-29 05:43:00,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014405762304922 [2023-11-29 05:43:00,102 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 501 transitions. [2023-11-29 05:43:00,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 501 transitions. [2023-11-29 05:43:00,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:00,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 501 transitions. [2023-11-29 05:43:00,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 29.470588235294116) internal successors, (501), 17 states have internal predecessors, (501), 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 05:43:00,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:43:00,105 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 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 05:43:00,105 INFO L175 Difference]: Start difference. First operand has 179 places, 175 transitions, 1915 flow. Second operand 17 states and 501 transitions. [2023-11-29 05:43:00,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 318 transitions, 3332 flow [2023-11-29 05:43:01,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 318 transitions, 3179 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-11-29 05:43:01,043 INFO L231 Difference]: Finished difference. Result has 186 places, 181 transitions, 2019 flow [2023-11-29 05:43:01,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2019, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2023-11-29 05:43:01,044 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2023-11-29 05:43:01,044 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 2019 flow [2023-11-29 05:43:01,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:01,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:01,044 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, 1, 1, 1] [2023-11-29 05:43:01,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:01,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:01,245 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:01,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 247802192, now seen corresponding path program 20 times [2023-11-29 05:43:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466102046] [2023-11-29 05:43:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466102046] [2023-11-29 05:43:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466102046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573598454] [2023-11-29 05:43:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:43:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:02,735 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:02,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:43:02,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:43:02,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:02,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:43:02,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:03,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:03,064 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:03,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573598454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:03,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:03,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:43:03,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567921923] [2023-11-29 05:43:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:03,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:03,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:03,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 2019 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:03,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:03,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:03,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:07,211 INFO L124 PetriNetUnfolderBase]: 14888/26434 cut-off events. [2023-11-29 05:43:07,211 INFO L125 PetriNetUnfolderBase]: For 139560/139571 co-relation queries the response was YES. [2023-11-29 05:43:07,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107401 conditions, 26434 events. 14888/26434 cut-off events. For 139560/139571 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 235541 event pairs, 6905 based on Foata normal form. 2/26030 useless extension candidates. Maximal degree in co-relation 107333. Up to 19486 conditions per place. [2023-11-29 05:43:07,545 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 157 selfloop transitions, 38 changer transitions 36/257 dead transitions. [2023-11-29 05:43:07,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 257 transitions, 2884 flow [2023-11-29 05:43:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:43:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:43:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 299 transitions. [2023-11-29 05:43:07,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.610204081632653 [2023-11-29 05:43:07,547 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 299 transitions. [2023-11-29 05:43:07,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 299 transitions. [2023-11-29 05:43:07,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:07,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 299 transitions. [2023-11-29 05:43:07,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.9) internal successors, (299), 10 states have internal predecessors, (299), 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 05:43:07,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:07,550 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:07,550 INFO L175 Difference]: Start difference. First operand has 186 places, 181 transitions, 2019 flow. Second operand 10 states and 299 transitions. [2023-11-29 05:43:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 257 transitions, 2884 flow [2023-11-29 05:43:08,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 257 transitions, 2700 flow, removed 23 selfloop flow, removed 15 redundant places. [2023-11-29 05:43:08,467 INFO L231 Difference]: Finished difference. Result has 181 places, 172 transitions, 1830 flow [2023-11-29 05:43:08,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1830, PETRI_PLACES=181, PETRI_TRANSITIONS=172} [2023-11-29 05:43:08,468 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2023-11-29 05:43:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 172 transitions, 1830 flow [2023-11-29 05:43:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:08,468 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, 1, 1, 1] [2023-11-29 05:43:08,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:08,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:08,669 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:08,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash 950186098, now seen corresponding path program 21 times [2023-11-29 05:43:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589307921] [2023-11-29 05:43:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:09,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589307921] [2023-11-29 05:43:09,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589307921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016347835] [2023-11-29 05:43:09,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:09,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:09,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:09,808 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:09,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:43:09,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:43:09,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:09,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:43:09,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:10,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:10,113 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:10,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016347835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2023-11-29 05:43:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71883607] [2023-11-29 05:43:10,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:43:10,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:10,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 172 transitions, 1830 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:10,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:10,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:10,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:13,745 INFO L124 PetriNetUnfolderBase]: 13500/24026 cut-off events. [2023-11-29 05:43:13,745 INFO L125 PetriNetUnfolderBase]: For 121442/121453 co-relation queries the response was YES. [2023-11-29 05:43:13,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96799 conditions, 24026 events. 13500/24026 cut-off events. For 121442/121453 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 211204 event pairs, 5624 based on Foata normal form. 2/23718 useless extension candidates. Maximal degree in co-relation 96733. Up to 14960 conditions per place. [2023-11-29 05:43:14,010 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 171 selfloop transitions, 44 changer transitions 8/249 dead transitions. [2023-11-29 05:43:14,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 249 transitions, 2628 flow [2023-11-29 05:43:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:43:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:43:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2023-11-29 05:43:14,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2023-11-29 05:43:14,012 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 298 transitions. [2023-11-29 05:43:14,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 298 transitions. [2023-11-29 05:43:14,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:14,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 298 transitions. [2023-11-29 05:43:14,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.8) internal successors, (298), 10 states have internal predecessors, (298), 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 05:43:14,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:14,015 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:14,015 INFO L175 Difference]: Start difference. First operand has 181 places, 172 transitions, 1830 flow. Second operand 10 states and 298 transitions. [2023-11-29 05:43:14,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 249 transitions, 2628 flow [2023-11-29 05:43:14,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 249 transitions, 2493 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-11-29 05:43:14,636 INFO L231 Difference]: Finished difference. Result has 170 places, 172 transitions, 1794 flow [2023-11-29 05:43:14,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1794, PETRI_PLACES=170, PETRI_TRANSITIONS=172} [2023-11-29 05:43:14,636 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 116 predicate places. [2023-11-29 05:43:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 172 transitions, 1794 flow [2023-11-29 05:43:14,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:14,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:14,637 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, 1, 1, 1] [2023-11-29 05:43:14,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:43:14,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:14,837 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1492815320, now seen corresponding path program 22 times [2023-11-29 05:43:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:14,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016102740] [2023-11-29 05:43:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:16,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016102740] [2023-11-29 05:43:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016102740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056128831] [2023-11-29 05:43:16,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:43:16,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:16,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:16,046 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:16,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:43:16,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:43:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:16,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:43:16,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:16,325 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:16,325 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:16,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:16,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056128831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:16,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:16,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:43:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940943124] [2023-11-29 05:43:16,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:16,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:16,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 172 transitions, 1794 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:16,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:16,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:19,891 INFO L124 PetriNetUnfolderBase]: 14061/24917 cut-off events. [2023-11-29 05:43:19,891 INFO L125 PetriNetUnfolderBase]: For 129467/129478 co-relation queries the response was YES. [2023-11-29 05:43:20,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100630 conditions, 24917 events. 14061/24917 cut-off events. For 129467/129478 co-relation queries the response was YES. Maximal size of possible extension queue 1561. Compared 220740 event pairs, 6786 based on Foata normal form. 2/24531 useless extension candidates. Maximal degree in co-relation 100568. Up to 19415 conditions per place. [2023-11-29 05:43:20,327 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 190 selfloop transitions, 28 changer transitions 8/252 dead transitions. [2023-11-29 05:43:20,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 252 transitions, 2684 flow [2023-11-29 05:43:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:43:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:43:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 294 transitions. [2023-11-29 05:43:20,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-11-29 05:43:20,329 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 294 transitions. [2023-11-29 05:43:20,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 294 transitions. [2023-11-29 05:43:20,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:20,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 294 transitions. [2023-11-29 05:43:20,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 29.4) internal successors, (294), 10 states have internal predecessors, (294), 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 05:43:20,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:20,331 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 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 05:43:20,331 INFO L175 Difference]: Start difference. First operand has 170 places, 172 transitions, 1794 flow. Second operand 10 states and 294 transitions. [2023-11-29 05:43:20,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 252 transitions, 2684 flow [2023-11-29 05:43:21,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 252 transitions, 2569 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-29 05:43:21,117 INFO L231 Difference]: Finished difference. Result has 175 places, 176 transitions, 1860 flow [2023-11-29 05:43:21,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1860, PETRI_PLACES=175, PETRI_TRANSITIONS=176} [2023-11-29 05:43:21,118 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2023-11-29 05:43:21,118 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 176 transitions, 1860 flow [2023-11-29 05:43:21,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:21,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:21,119 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, 1, 1, 1] [2023-11-29 05:43:21,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:43:21,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:21,319 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:21,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:21,319 INFO L85 PathProgramCache]: Analyzing trace with hash -897876186, now seen corresponding path program 23 times [2023-11-29 05:43:21,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540260212] [2023-11-29 05:43:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:22,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540260212] [2023-11-29 05:43:22,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540260212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:22,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664812291] [2023-11-29 05:43:22,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:43:22,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:22,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:22,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:43:22,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:43:22,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:22,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:43:22,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:23,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:23,024 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:43:23,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:23,192 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:43:23,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:43:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664812291] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:23,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:43:23,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 24 [2023-11-29 05:43:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587059272] [2023-11-29 05:43:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:23,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:43:23,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:23,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 176 transitions, 1860 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:23,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:23,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:23,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:26,942 INFO L124 PetriNetUnfolderBase]: 14103/25201 cut-off events. [2023-11-29 05:43:26,942 INFO L125 PetriNetUnfolderBase]: For 126720/126731 co-relation queries the response was YES. [2023-11-29 05:43:27,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100613 conditions, 25201 events. 14103/25201 cut-off events. For 126720/126731 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 224324 event pairs, 5834 based on Foata normal form. 2/24882 useless extension candidates. Maximal degree in co-relation 100549. Up to 16692 conditions per place. [2023-11-29 05:43:27,248 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 202 selfloop transitions, 47 changer transitions 15/290 dead transitions. [2023-11-29 05:43:27,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 290 transitions, 2946 flow [2023-11-29 05:43:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:43:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:43:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 433 transitions. [2023-11-29 05:43:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891156462585034 [2023-11-29 05:43:27,250 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 433 transitions. [2023-11-29 05:43:27,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 433 transitions. [2023-11-29 05:43:27,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:27,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 433 transitions. [2023-11-29 05:43:27,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 28.866666666666667) internal successors, (433), 15 states have internal predecessors, (433), 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 05:43:27,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 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 05:43:27,253 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 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 05:43:27,253 INFO L175 Difference]: Start difference. First operand has 175 places, 176 transitions, 1860 flow. Second operand 15 states and 433 transitions. [2023-11-29 05:43:27,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 290 transitions, 2946 flow [2023-11-29 05:43:28,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 290 transitions, 2778 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-11-29 05:43:28,071 INFO L231 Difference]: Finished difference. Result has 184 places, 176 transitions, 1794 flow [2023-11-29 05:43:28,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1794, PETRI_PLACES=184, PETRI_TRANSITIONS=176} [2023-11-29 05:43:28,071 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2023-11-29 05:43:28,072 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 176 transitions, 1794 flow [2023-11-29 05:43:28,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:28,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:28,072 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, 1, 1, 1] [2023-11-29 05:43:28,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:43:28,272 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:28,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1520531154, now seen corresponding path program 24 times [2023-11-29 05:43:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216842280] [2023-11-29 05:43:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:29,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216842280] [2023-11-29 05:43:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216842280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763870085] [2023-11-29 05:43:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:43:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:29,541 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:29,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:43:29,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-29 05:43:29,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:29,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:43:29,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:29,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:29,865 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:29,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763870085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:29,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2023-11-29 05:43:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914990669] [2023-11-29 05:43:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:43:29,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:29,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 176 transitions, 1794 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:29,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:29,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:29,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:33,571 INFO L124 PetriNetUnfolderBase]: 14206/25226 cut-off events. [2023-11-29 05:43:33,572 INFO L125 PetriNetUnfolderBase]: For 119092/119103 co-relation queries the response was YES. [2023-11-29 05:43:33,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100299 conditions, 25226 events. 14206/25226 cut-off events. For 119092/119103 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 223925 event pairs, 5082 based on Foata normal form. 2/24878 useless extension candidates. Maximal degree in co-relation 100235. Up to 9716 conditions per place. [2023-11-29 05:43:33,977 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 180 selfloop transitions, 54 changer transitions 11/271 dead transitions. [2023-11-29 05:43:33,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 271 transitions, 2724 flow [2023-11-29 05:43:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:43:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:43:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 332 transitions. [2023-11-29 05:43:33,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159554730983302 [2023-11-29 05:43:33,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 332 transitions. [2023-11-29 05:43:33,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 332 transitions. [2023-11-29 05:43:33,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:33,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 332 transitions. [2023-11-29 05:43:33,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.181818181818183) internal successors, (332), 11 states have internal predecessors, (332), 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 05:43:33,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:33,980 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:33,981 INFO L175 Difference]: Start difference. First operand has 184 places, 176 transitions, 1794 flow. Second operand 11 states and 332 transitions. [2023-11-29 05:43:33,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 271 transitions, 2724 flow [2023-11-29 05:43:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 271 transitions, 2649 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-11-29 05:43:34,535 INFO L231 Difference]: Finished difference. Result has 184 places, 174 transitions, 1812 flow [2023-11-29 05:43:34,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1812, PETRI_PLACES=184, PETRI_TRANSITIONS=174} [2023-11-29 05:43:34,535 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2023-11-29 05:43:34,535 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 174 transitions, 1812 flow [2023-11-29 05:43:34,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:34,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:34,536 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, 1, 1, 1] [2023-11-29 05:43:34,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:43:34,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:43:34,736 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:34,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1599336232, now seen corresponding path program 25 times [2023-11-29 05:43:34,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:34,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392613735] [2023-11-29 05:43:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:34,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392613735] [2023-11-29 05:43:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392613735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:36,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181493505] [2023-11-29 05:43:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:43:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:36,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:36,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:43:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:36,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:43:36,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:36,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:36,359 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:43:36,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:36,542 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:43:36,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:43:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181493505] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:36,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:43:36,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 9] total 24 [2023-11-29 05:43:36,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264443820] [2023-11-29 05:43:36,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:36,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:36,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:43:36,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:36,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 174 transitions, 1812 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:36,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:36,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:36,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:40,423 INFO L124 PetriNetUnfolderBase]: 14357/25713 cut-off events. [2023-11-29 05:43:40,423 INFO L125 PetriNetUnfolderBase]: For 123692/123703 co-relation queries the response was YES. [2023-11-29 05:43:40,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102006 conditions, 25713 events. 14357/25713 cut-off events. For 123692/123703 co-relation queries the response was YES. Maximal size of possible extension queue 1626. Compared 230126 event pairs, 6650 based on Foata normal form. 2/25354 useless extension candidates. Maximal degree in co-relation 101940. Up to 18050 conditions per place. [2023-11-29 05:43:40,704 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 209 selfloop transitions, 40 changer transitions 3/278 dead transitions. [2023-11-29 05:43:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 278 transitions, 2809 flow [2023-11-29 05:43:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:43:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:43:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 398 transitions. [2023-11-29 05:43:40,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801749271137027 [2023-11-29 05:43:40,706 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 398 transitions. [2023-11-29 05:43:40,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 398 transitions. [2023-11-29 05:43:40,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:40,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 398 transitions. [2023-11-29 05:43:40,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 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 05:43:40,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 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 05:43:40,707 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 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 05:43:40,708 INFO L175 Difference]: Start difference. First operand has 184 places, 174 transitions, 1812 flow. Second operand 14 states and 398 transitions. [2023-11-29 05:43:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 278 transitions, 2809 flow [2023-11-29 05:43:41,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 278 transitions, 2640 flow, removed 23 selfloop flow, removed 13 redundant places. [2023-11-29 05:43:41,467 INFO L231 Difference]: Finished difference. Result has 186 places, 177 transitions, 1783 flow [2023-11-29 05:43:41,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1783, PETRI_PLACES=186, PETRI_TRANSITIONS=177} [2023-11-29 05:43:41,468 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2023-11-29 05:43:41,468 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 177 transitions, 1783 flow [2023-11-29 05:43:41,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:41,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:41,468 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, 1, 1, 1] [2023-11-29 05:43:41,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:43:41,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:43:41,669 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1491321614, now seen corresponding path program 26 times [2023-11-29 05:43:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445170829] [2023-11-29 05:43:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:42,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445170829] [2023-11-29 05:43:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445170829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418306146] [2023-11-29 05:43:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:43:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:42,992 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:42,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:43:43,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:43:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:43,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:43:43,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:43,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:43,281 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:43,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418306146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:43,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:43,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:43:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299999836] [2023-11-29 05:43:43,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:43,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 177 transitions, 1783 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:43,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:47,173 INFO L124 PetriNetUnfolderBase]: 14308/25498 cut-off events. [2023-11-29 05:43:47,173 INFO L125 PetriNetUnfolderBase]: For 120478/120489 co-relation queries the response was YES. [2023-11-29 05:43:47,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100949 conditions, 25498 events. 14308/25498 cut-off events. For 120478/120489 co-relation queries the response was YES. Maximal size of possible extension queue 1611. Compared 227680 event pairs, 7088 based on Foata normal form. 2/25104 useless extension candidates. Maximal degree in co-relation 100887. Up to 19964 conditions per place. [2023-11-29 05:43:47,455 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 183 selfloop transitions, 28 changer transitions 15/252 dead transitions. [2023-11-29 05:43:47,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 252 transitions, 2575 flow [2023-11-29 05:43:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:43:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:43:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 312 transitions. [2023-11-29 05:43:47,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788497217068646 [2023-11-29 05:43:47,456 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 312 transitions. [2023-11-29 05:43:47,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 312 transitions. [2023-11-29 05:43:47,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:47,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 312 transitions. [2023-11-29 05:43:47,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 28.363636363636363) internal successors, (312), 11 states have internal predecessors, (312), 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 05:43:47,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:47,458 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:47,458 INFO L175 Difference]: Start difference. First operand has 186 places, 177 transitions, 1783 flow. Second operand 11 states and 312 transitions. [2023-11-29 05:43:47,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 252 transitions, 2575 flow [2023-11-29 05:43:47,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 252 transitions, 2337 flow, removed 22 selfloop flow, removed 21 redundant places. [2023-11-29 05:43:47,947 INFO L231 Difference]: Finished difference. Result has 176 places, 177 transitions, 1605 flow [2023-11-29 05:43:47,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1605, PETRI_PLACES=176, PETRI_TRANSITIONS=177} [2023-11-29 05:43:47,948 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2023-11-29 05:43:47,948 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 177 transitions, 1605 flow [2023-11-29 05:43:47,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:47,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:47,948 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, 1, 1, 1] [2023-11-29 05:43:47,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:43:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:43:48,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:48,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash -672414136, now seen corresponding path program 27 times [2023-11-29 05:43:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:48,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673489954] [2023-11-29 05:43:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:48,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:49,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673489954] [2023-11-29 05:43:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673489954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106206701] [2023-11-29 05:43:49,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:49,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:49,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:49,171 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:49,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:43:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 05:43:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:49,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:43:49,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:49,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:49,458 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:49,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:49,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106206701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:49,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:49,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:43:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926277320] [2023-11-29 05:43:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:49,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:49,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:49,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 177 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:49,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:49,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:49,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:52,829 INFO L124 PetriNetUnfolderBase]: 14324/25672 cut-off events. [2023-11-29 05:43:52,829 INFO L125 PetriNetUnfolderBase]: For 104616/104627 co-relation queries the response was YES. [2023-11-29 05:43:52,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98799 conditions, 25672 events. 14324/25672 cut-off events. For 104616/104627 co-relation queries the response was YES. Maximal size of possible extension queue 1620. Compared 229783 event pairs, 5906 based on Foata normal form. 2/25358 useless extension candidates. Maximal degree in co-relation 98747. Up to 17156 conditions per place. [2023-11-29 05:43:53,059 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 151 selfloop transitions, 37 changer transitions 39/253 dead transitions. [2023-11-29 05:43:53,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 253 transitions, 2416 flow [2023-11-29 05:43:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:43:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:43:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2023-11-29 05:43:53,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2023-11-29 05:43:53,060 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 315 transitions. [2023-11-29 05:43:53,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 315 transitions. [2023-11-29 05:43:53,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:53,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 315 transitions. [2023-11-29 05:43:53,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 28.636363636363637) internal successors, (315), 11 states have internal predecessors, (315), 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 05:43:53,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:53,062 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:43:53,062 INFO L175 Difference]: Start difference. First operand has 176 places, 177 transitions, 1605 flow. Second operand 11 states and 315 transitions. [2023-11-29 05:43:53,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 253 transitions, 2416 flow [2023-11-29 05:43:53,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 253 transitions, 2335 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-29 05:43:53,306 INFO L231 Difference]: Finished difference. Result has 177 places, 169 transitions, 1505 flow [2023-11-29 05:43:53,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1505, PETRI_PLACES=177, PETRI_TRANSITIONS=169} [2023-11-29 05:43:53,306 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 123 predicate places. [2023-11-29 05:43:53,306 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 169 transitions, 1505 flow [2023-11-29 05:43:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:53,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:53,307 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, 1, 1, 1] [2023-11-29 05:43:53,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:43:53,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:43:53,507 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:53,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1239013236, now seen corresponding path program 28 times [2023-11-29 05:43:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:53,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520237736] [2023-11-29 05:43:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520237736] [2023-11-29 05:43:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520237736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358676737] [2023-11-29 05:43:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:43:54,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:54,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:54,977 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:54,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:43:55,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:43:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:55,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:43:55,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:55,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:43:55,245 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:43:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:43:55,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358676737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-11-29 05:43:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598019438] [2023-11-29 05:43:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:55,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:43:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:43:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:43:55,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:43:55,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 169 transitions, 1505 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:55,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:55,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:43:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:58,409 INFO L124 PetriNetUnfolderBase]: 13453/23965 cut-off events. [2023-11-29 05:43:58,409 INFO L125 PetriNetUnfolderBase]: For 99158/99169 co-relation queries the response was YES. [2023-11-29 05:43:58,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92390 conditions, 23965 events. 13453/23965 cut-off events. For 99158/99169 co-relation queries the response was YES. Maximal size of possible extension queue 1545. Compared 212267 event pairs, 6546 based on Foata normal form. 2/23657 useless extension candidates. Maximal degree in co-relation 92337. Up to 18965 conditions per place. [2023-11-29 05:43:58,630 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 174 selfloop transitions, 27 changer transitions 13/240 dead transitions. [2023-11-29 05:43:58,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 240 transitions, 2239 flow [2023-11-29 05:43:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:43:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:43:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2023-11-29 05:43:58,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 05:43:58,632 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 273 transitions. [2023-11-29 05:43:58,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 273 transitions. [2023-11-29 05:43:58,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:58,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 273 transitions. [2023-11-29 05:43:58,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 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 05:43:58,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:43:58,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:43:58,633 INFO L175 Difference]: Start difference. First operand has 177 places, 169 transitions, 1505 flow. Second operand 9 states and 273 transitions. [2023-11-29 05:43:58,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 240 transitions, 2239 flow [2023-11-29 05:43:58,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 240 transitions, 2129 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-11-29 05:43:58,832 INFO L231 Difference]: Finished difference. Result has 165 places, 169 transitions, 1467 flow [2023-11-29 05:43:58,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=165, PETRI_TRANSITIONS=169} [2023-11-29 05:43:58,833 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 111 predicate places. [2023-11-29 05:43:58,833 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 169 transitions, 1467 flow [2023-11-29 05:43:58,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:43:58,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:58,833 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, 1, 1, 1] [2023-11-29 05:43:58,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:43:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:43:59,034 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:43:59,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -15770454, now seen corresponding path program 29 times [2023-11-29 05:43:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842465730] [2023-11-29 05:43:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:00,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842465730] [2023-11-29 05:44:00,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842465730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:00,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901070659] [2023-11-29 05:44:00,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:44:00,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:00,338 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:44:00,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:44:00,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:00,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:44:00,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:00,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:44:00,643 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2023-11-29 05:44:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:44:00,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:00,806 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-29 05:44:00,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-29 05:44:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901070659] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:00,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:44:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 9] total 24 [2023-11-29 05:44:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043032033] [2023-11-29 05:44:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:44:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:44:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:44:00,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:44:00,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 169 transitions, 1467 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:44:00,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:00,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:44:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:04,009 INFO L124 PetriNetUnfolderBase]: 13494/24138 cut-off events. [2023-11-29 05:44:04,009 INFO L125 PetriNetUnfolderBase]: For 95949/95960 co-relation queries the response was YES. [2023-11-29 05:44:04,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92281 conditions, 24138 events. 13494/24138 cut-off events. For 95949/95960 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 214695 event pairs, 6466 based on Foata normal form. 2/23827 useless extension candidates. Maximal degree in co-relation 92230. Up to 17665 conditions per place. [2023-11-29 05:44:04,220 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 145 selfloop transitions, 17 changer transitions 69/257 dead transitions. [2023-11-29 05:44:04,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 257 transitions, 2332 flow [2023-11-29 05:44:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:44:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:44:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 349 transitions. [2023-11-29 05:44:04,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5935374149659864 [2023-11-29 05:44:04,222 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 349 transitions. [2023-11-29 05:44:04,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 349 transitions. [2023-11-29 05:44:04,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:04,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 349 transitions. [2023-11-29 05:44:04,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 29.083333333333332) internal successors, (349), 12 states have internal predecessors, (349), 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 05:44:04,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 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 05:44:04,225 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 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 05:44:04,225 INFO L175 Difference]: Start difference. First operand has 165 places, 169 transitions, 1467 flow. Second operand 12 states and 349 transitions. [2023-11-29 05:44:04,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 257 transitions, 2332 flow [2023-11-29 05:44:04,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 257 transitions, 2260 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-29 05:44:04,460 INFO L231 Difference]: Finished difference. Result has 169 places, 150 transitions, 1251 flow [2023-11-29 05:44:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1251, PETRI_PLACES=169, PETRI_TRANSITIONS=150} [2023-11-29 05:44:04,461 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 115 predicate places. [2023-11-29 05:44:04,461 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 150 transitions, 1251 flow [2023-11-29 05:44:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 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 05:44:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:04,461 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, 1, 1, 1] [2023-11-29 05:44:04,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 05:44:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:04,662 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:04,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1577211834, now seen corresponding path program 30 times [2023-11-29 05:44:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079429172] [2023-11-29 05:44:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079429172] [2023-11-29 05:44:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079429172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:04,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:04,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:04,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936731868] [2023-11-29 05:44:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:04,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:04,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:04,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:44:04,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 150 transitions, 1251 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:04,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:04,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:44:04,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:09,593 INFO L124 PetriNetUnfolderBase]: 25321/42201 cut-off events. [2023-11-29 05:44:09,593 INFO L125 PetriNetUnfolderBase]: For 178550/178641 co-relation queries the response was YES. [2023-11-29 05:44:09,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161776 conditions, 42201 events. 25321/42201 cut-off events. For 178550/178641 co-relation queries the response was YES. Maximal size of possible extension queue 1893. Compared 352788 event pairs, 11911 based on Foata normal form. 76/42177 useless extension candidates. Maximal degree in co-relation 161738. Up to 25922 conditions per place. [2023-11-29 05:44:09,976 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 382 selfloop transitions, 13 changer transitions 49/462 dead transitions. [2023-11-29 05:44:09,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 462 transitions, 4906 flow [2023-11-29 05:44:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:44:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 05:44:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2023-11-29 05:44:09,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732838589981447 [2023-11-29 05:44:09,978 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 309 transitions. [2023-11-29 05:44:09,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 309 transitions. [2023-11-29 05:44:09,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:09,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 309 transitions. [2023-11-29 05:44:09,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 28.09090909090909) internal successors, (309), 11 states have internal predecessors, (309), 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 05:44:09,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:44:09,981 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 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 05:44:09,981 INFO L175 Difference]: Start difference. First operand has 169 places, 150 transitions, 1251 flow. Second operand 11 states and 309 transitions. [2023-11-29 05:44:09,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 462 transitions, 4906 flow [2023-11-29 05:44:10,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 462 transitions, 4392 flow, removed 21 selfloop flow, removed 18 redundant places. [2023-11-29 05:44:10,236 INFO L231 Difference]: Finished difference. Result has 150 places, 155 transitions, 1206 flow [2023-11-29 05:44:10,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1206, PETRI_PLACES=150, PETRI_TRANSITIONS=155} [2023-11-29 05:44:10,236 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2023-11-29 05:44:10,236 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 155 transitions, 1206 flow [2023-11-29 05:44:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:10,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:10,237 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, 1, 1, 1] [2023-11-29 05:44:10,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-29 05:44:10,237 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:10,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash -854663706, now seen corresponding path program 31 times [2023-11-29 05:44:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:10,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844844988] [2023-11-29 05:44:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:10,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844844988] [2023-11-29 05:44:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844844988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:10,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:44:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156984752] [2023-11-29 05:44:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:10,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:44:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:44:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:44:10,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:44:10,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 155 transitions, 1206 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 05:44:10,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:10,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:44:10,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:13,667 INFO L124 PetriNetUnfolderBase]: 16049/29527 cut-off events. [2023-11-29 05:44:13,667 INFO L125 PetriNetUnfolderBase]: For 115532/115908 co-relation queries the response was YES. [2023-11-29 05:44:13,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109982 conditions, 29527 events. 16049/29527 cut-off events. For 115532/115908 co-relation queries the response was YES. Maximal size of possible extension queue 2008. Compared 276630 event pairs, 15151 based on Foata normal form. 262/29193 useless extension candidates. Maximal degree in co-relation 109946. Up to 26569 conditions per place. [2023-11-29 05:44:13,941 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 121 selfloop transitions, 2 changer transitions 0/162 dead transitions. [2023-11-29 05:44:13,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 162 transitions, 1503 flow [2023-11-29 05:44:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:44:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:44:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-29 05:44:13,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-29 05:44:13,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-29 05:44:13,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-29 05:44:13,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:13,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-29 05:44:13,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 05:44:13,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:44:13,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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 05:44:13,943 INFO L175 Difference]: Start difference. First operand has 150 places, 155 transitions, 1206 flow. Second operand 3 states and 90 transitions. [2023-11-29 05:44:13,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 162 transitions, 1503 flow [2023-11-29 05:44:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 162 transitions, 1483 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 05:44:14,305 INFO L231 Difference]: Finished difference. Result has 145 places, 155 transitions, 1194 flow [2023-11-29 05:44:14,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1194, PETRI_PLACES=145, PETRI_TRANSITIONS=155} [2023-11-29 05:44:14,305 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2023-11-29 05:44:14,305 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 155 transitions, 1194 flow [2023-11-29 05:44:14,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 05:44:14,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:14,305 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, 1, 1, 1] [2023-11-29 05:44:14,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-11-29 05:44:14,306 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:14,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash -339136152, now seen corresponding path program 32 times [2023-11-29 05:44:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:14,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415930999] [2023-11-29 05:44:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415930999] [2023-11-29 05:44:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415930999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:14,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011936307] [2023-11-29 05:44:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:14,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:44:14,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 155 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:14,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:14,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:44:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:19,293 INFO L124 PetriNetUnfolderBase]: 25417/42701 cut-off events. [2023-11-29 05:44:19,293 INFO L125 PetriNetUnfolderBase]: For 174054/174094 co-relation queries the response was YES. [2023-11-29 05:44:19,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161055 conditions, 42701 events. 25417/42701 cut-off events. For 174054/174094 co-relation queries the response was YES. Maximal size of possible extension queue 1977. Compared 361052 event pairs, 13057 based on Foata normal form. 72/42666 useless extension candidates. Maximal degree in co-relation 161021. Up to 27082 conditions per place. [2023-11-29 05:44:19,656 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 321 selfloop transitions, 12 changer transitions 23/374 dead transitions. [2023-11-29 05:44:19,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 374 transitions, 3605 flow [2023-11-29 05:44:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:44:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 05:44:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2023-11-29 05:44:19,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5668934240362812 [2023-11-29 05:44:19,658 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 250 transitions. [2023-11-29 05:44:19,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 250 transitions. [2023-11-29 05:44:19,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:19,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 250 transitions. [2023-11-29 05:44:19,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.77777777777778) internal successors, (250), 9 states have internal predecessors, (250), 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 05:44:19,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:44:19,659 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 49.0) internal successors, (490), 10 states have internal predecessors, (490), 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 05:44:19,659 INFO L175 Difference]: Start difference. First operand has 145 places, 155 transitions, 1194 flow. Second operand 9 states and 250 transitions. [2023-11-29 05:44:19,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 374 transitions, 3605 flow [2023-11-29 05:44:20,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 374 transitions, 3601 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:44:20,043 INFO L231 Difference]: Finished difference. Result has 153 places, 154 transitions, 1213 flow [2023-11-29 05:44:20,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1213, PETRI_PLACES=153, PETRI_TRANSITIONS=154} [2023-11-29 05:44:20,044 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2023-11-29 05:44:20,044 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 154 transitions, 1213 flow [2023-11-29 05:44:20,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:20,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:20,044 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, 1, 1, 1] [2023-11-29 05:44:20,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-11-29 05:44:20,044 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:20,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1125374954, now seen corresponding path program 33 times [2023-11-29 05:44:20,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903474195] [2023-11-29 05:44:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:20,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903474195] [2023-11-29 05:44:20,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903474195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:20,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:20,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842133387] [2023-11-29 05:44:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:20,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:44:20,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 154 transitions, 1213 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:20,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:20,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:44:20,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:23,237 INFO L124 PetriNetUnfolderBase]: 16868/28252 cut-off events. [2023-11-29 05:44:23,238 INFO L125 PetriNetUnfolderBase]: For 113701/113741 co-relation queries the response was YES. [2023-11-29 05:44:23,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107033 conditions, 28252 events. 16868/28252 cut-off events. For 113701/113741 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 224078 event pairs, 10757 based on Foata normal form. 72/28243 useless extension candidates. Maximal degree in co-relation 106997. Up to 27022 conditions per place. [2023-11-29 05:44:23,490 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 144 selfloop transitions, 5 changer transitions 43/210 dead transitions. [2023-11-29 05:44:23,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 210 transitions, 1975 flow [2023-11-29 05:44:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:44:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:44:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2023-11-29 05:44:23,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127551020408163 [2023-11-29 05:44:23,491 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 201 transitions. [2023-11-29 05:44:23,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 201 transitions. [2023-11-29 05:44:23,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:23,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 201 transitions. [2023-11-29 05:44:23,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 25.125) internal successors, (201), 8 states have internal predecessors, (201), 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 05:44:23,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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 05:44:23,493 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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 05:44:23,493 INFO L175 Difference]: Start difference. First operand has 153 places, 154 transitions, 1213 flow. Second operand 8 states and 201 transitions. [2023-11-29 05:44:23,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 210 transitions, 1975 flow [2023-11-29 05:44:23,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 210 transitions, 1933 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-11-29 05:44:23,829 INFO L231 Difference]: Finished difference. Result has 150 places, 146 transitions, 1125 flow [2023-11-29 05:44:23,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=150, PETRI_TRANSITIONS=146} [2023-11-29 05:44:23,830 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2023-11-29 05:44:23,830 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 146 transitions, 1125 flow [2023-11-29 05:44:23,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:23,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:23,830 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, 1, 1, 1] [2023-11-29 05:44:23,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-29 05:44:23,830 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:23,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:23,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1348442728, now seen corresponding path program 34 times [2023-11-29 05:44:23,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:23,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589447844] [2023-11-29 05:44:23,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:23,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:23,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589447844] [2023-11-29 05:44:23,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589447844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:23,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:23,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380929542] [2023-11-29 05:44:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:23,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:23,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:23,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:44:23,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 146 transitions, 1125 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:23,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:23,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:44:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:25,717 INFO L124 PetriNetUnfolderBase]: 8194/13575 cut-off events. [2023-11-29 05:44:25,718 INFO L125 PetriNetUnfolderBase]: For 52373/52397 co-relation queries the response was YES. [2023-11-29 05:44:25,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50519 conditions, 13575 events. 8194/13575 cut-off events. For 52373/52397 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 94478 event pairs, 4960 based on Foata normal form. 72/13599 useless extension candidates. Maximal degree in co-relation 50486. Up to 12603 conditions per place. [2023-11-29 05:44:25,811 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 132 selfloop transitions, 3 changer transitions 40/193 dead transitions. [2023-11-29 05:44:25,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 193 transitions, 1807 flow [2023-11-29 05:44:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:44:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:44:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2023-11-29 05:44:25,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2023-11-29 05:44:25,813 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 176 transitions. [2023-11-29 05:44:25,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 176 transitions. [2023-11-29 05:44:25,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:25,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 176 transitions. [2023-11-29 05:44:25,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 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 05:44:25,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 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 05:44:25,814 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 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 05:44:25,814 INFO L175 Difference]: Start difference. First operand has 150 places, 146 transitions, 1125 flow. Second operand 7 states and 176 transitions. [2023-11-29 05:44:25,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 193 transitions, 1807 flow [2023-11-29 05:44:25,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 193 transitions, 1771 flow, removed 5 selfloop flow, removed 12 redundant places. [2023-11-29 05:44:25,864 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1065 flow [2023-11-29 05:44:25,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1065, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2023-11-29 05:44:25,864 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2023-11-29 05:44:25,864 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1065 flow [2023-11-29 05:44:25,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:25,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:25,865 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, 1, 1, 1] [2023-11-29 05:44:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-29 05:44:25,865 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 05:44:25,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash -737504828, now seen corresponding path program 35 times [2023-11-29 05:44:25,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:25,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880499437] [2023-11-29 05:44:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:25,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:44:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880499437] [2023-11-29 05:44:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880499437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:44:25,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:44:25,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:44:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548221169] [2023-11-29 05:44:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:44:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:44:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:44:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:44:25,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:44:25,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1065 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:25,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:25,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:44:25,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:26,199 INFO L124 PetriNetUnfolderBase]: 683/1242 cut-off events. [2023-11-29 05:44:26,199 INFO L125 PetriNetUnfolderBase]: For 4285/4309 co-relation queries the response was YES. [2023-11-29 05:44:26,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1242 events. 683/1242 cut-off events. For 4285/4309 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6264 event pairs, 32 based on Foata normal form. 74/1296 useless extension candidates. Maximal degree in co-relation 4366. Up to 428 conditions per place. [2023-11-29 05:44:26,203 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 0 selfloop transitions, 0 changer transitions 94/94 dead transitions. [2023-11-29 05:44:26,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 814 flow [2023-11-29 05:44:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:44:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:44:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2023-11-29 05:44:26,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2023-11-29 05:44:26,204 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 172 transitions. [2023-11-29 05:44:26,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 172 transitions. [2023-11-29 05:44:26,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:26,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 172 transitions. [2023-11-29 05:44:26,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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 05:44:26,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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 05:44:26,205 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 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 05:44:26,205 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1065 flow. Second operand 8 states and 172 transitions. [2023-11-29 05:44:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 814 flow [2023-11-29 05:44:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 497 flow, removed 72 selfloop flow, removed 29 redundant places. [2023-11-29 05:44:26,215 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-11-29 05:44:26,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-11-29 05:44:26,215 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2023-11-29 05:44:26,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-11-29 05:44:26,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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 05:44:26,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-29 05:44:26,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-29 05:44:26,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-29 05:44:26,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-29 05:44:26,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-11-29 05:44:26,218 INFO L445 BasicCegarLoop]: Path program histogram: [35, 1] [2023-11-29 05:44:26,221 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 05:44:26,221 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:44:26,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:44:26 BasicIcfg [2023-11-29 05:44:26,225 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:44:26,225 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:44:26,225 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:44:26,225 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:44:26,225 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:41:01" (3/4) ... [2023-11-29 05:44:26,227 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 05:44:26,229 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 05:44:26,229 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 05:44:26,229 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-11-29 05:44:26,236 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 129 nodes and edges [2023-11-29 05:44:26,236 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2023-11-29 05:44:26,236 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-29 05:44:26,237 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 05:44:26,313 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 05:44:26,314 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 05:44:26,314 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:44:26,315 INFO L158 Benchmark]: Toolchain (without parser) took 205703.67ms. Allocated memory was 140.5MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 102.9MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 8.8GB. Max. memory is 16.1GB. [2023-11-29 05:44:26,315 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:44:26,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.87ms. Allocated memory is still 140.5MB. Free memory was 102.9MB in the beginning and 90.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 05:44:26,316 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.58ms. Allocated memory is still 140.5MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:44:26,316 INFO L158 Benchmark]: Boogie Preprocessor took 54.99ms. Allocated memory is still 140.5MB. Free memory was 88.3MB in the beginning and 85.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:44:26,317 INFO L158 Benchmark]: RCFGBuilder took 867.49ms. Allocated memory was 140.5MB in the beginning and 195.0MB in the end (delta: 54.5MB). Free memory was 85.2MB in the beginning and 128.9MB in the end (delta: -43.8MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2023-11-29 05:44:26,317 INFO L158 Benchmark]: TraceAbstraction took 204368.44ms. Allocated memory was 195.0MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 128.9MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 8.8GB. Max. memory is 16.1GB. [2023-11-29 05:44:26,317 INFO L158 Benchmark]: Witness Printer took 89.11ms. Allocated memory is still 12.1GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 05:44:26,319 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.87ms. Allocated memory is still 140.5MB. Free memory was 102.9MB in the beginning and 90.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.58ms. Allocated memory is still 140.5MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.99ms. Allocated memory is still 140.5MB. Free memory was 88.3MB in the beginning and 85.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 867.49ms. Allocated memory was 140.5MB in the beginning and 195.0MB in the end (delta: 54.5MB). Free memory was 85.2MB in the beginning and 128.9MB in the end (delta: -43.8MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * TraceAbstraction took 204368.44ms. Allocated memory was 195.0MB in the beginning and 12.1GB in the end (delta: 11.9GB). Free memory was 128.9MB in the beginning and 3.2GB in the end (delta: -3.1GB). Peak memory consumption was 8.8GB. Max. memory is 16.1GB. * Witness Printer took 89.11ms. Allocated memory is still 12.1GB. Free memory was 3.2GB in the beginning and 3.2GB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 84 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 204.2s, OverallIterations: 36, TraceHistogramMax: 2, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 146.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4318 SdHoareTripleChecker+Valid, 14.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4272 mSDsluCounter, 212 SdHoareTripleChecker+Invalid, 12.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 156 mSDsCounter, 220 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20008 IncrementalHoareTripleChecker+Invalid, 20228 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 220 mSolverCounterUnsat, 56 mSDtfsCounter, 20008 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2229 GetRequests, 1475 SyntacticMatches, 1 SemanticMatches, 753 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2019occurred in iteration=20, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 47.4s InterpolantComputationTime, 2887 NumberOfCodeBlocks, 2824 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 3228 ConstructedInterpolants, 307 QuantifiedInterpolants, 50314 SizeOfPredicates, 251 NumberOfNonLiveVariables, 6483 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 72 InterpolantComputations, 35 PerfectInterpolantSequences, 102/193 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 05:44:26,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_663b8dfc-6b2d-4bb7-897a-d8e1d4759ef8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE