./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:58,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:58,970 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:00:58,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:58,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:59,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:59,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:59,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:59,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:59,017 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:59,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:59,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:59,018 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:59,019 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:59,020 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:59,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:59,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:59,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:59,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:59,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:59,023 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:00:59,028 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:00:59,029 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:00:59,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:59,029 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:00:59,030 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:59,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:00:59,030 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:59,031 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:59,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:59,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:59,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:59,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:59,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:59,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:59,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:59,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:59,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:59,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:59,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:59,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:59,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:59,038 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_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-10-31 22:00:59,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:59,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:59,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:59,399 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:59,400 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:59,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c Unable to find full path for "g++" [2024-10-31 22:01:01,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:01:02,059 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:01:02,060 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-31 22:01:02,073 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/data/a9d8d6970/90ce618db7244921b35a2762f4de64d5/FLAG2a9b789f7 [2024-10-31 22:01:02,088 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/data/a9d8d6970/90ce618db7244921b35a2762f4de64d5 [2024-10-31 22:01:02,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:01:02,095 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:01:02,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:02,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:01:02,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:01:02,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,113 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c04264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02, skipping insertion in model container [2024-10-31 22:01:02,113 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,140 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:01:02,376 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:01:02,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:02,394 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:01:02,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:02,441 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:01:02,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02 WrapperNode [2024-10-31 22:01:02,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:02,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:02,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:01:02,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:01:02,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,494 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 158 [2024-10-31 22:01:02,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:02,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:01:02,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:01:02,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:01:02,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,512 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,527 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:01:02,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:01:02,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:01:02,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:01:02,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:01:02,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (1/1) ... [2024-10-31 22:01:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:02,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:01:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:01:02,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:01:02,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:01:02,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:01:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:01:02,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:01:02,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:01:02,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:01:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:01:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:01:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:01:02,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:01:02,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:01:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:01:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:01:02,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:01:02,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:01:02,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:01:02,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:01:02,632 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:01:02,795 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:01:02,798 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:01:03,311 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:01:03,312 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:01:03,594 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:01:03,594 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:01:03,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:03 BoogieIcfgContainer [2024-10-31 22:01:03,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:01:03,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:01:03,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:01:03,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:01:03,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:01:02" (1/3) ... [2024-10-31 22:01:03,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea085d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:03, skipping insertion in model container [2024-10-31 22:01:03,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:02" (2/3) ... [2024-10-31 22:01:03,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea085d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:03, skipping insertion in model container [2024-10-31 22:01:03,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:03" (3/3) ... [2024-10-31 22:01:03,608 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-10-31 22:01:03,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:01:03,628 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-31 22:01:03,628 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:01:03,681 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:01:03,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 46 transitions, 113 flow [2024-10-31 22:01:03,762 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-10-31 22:01:03,762 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:01:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 4/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 96 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-10-31 22:01:03,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 46 transitions, 113 flow [2024-10-31 22:01:03,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 42 transitions, 102 flow [2024-10-31 22:01:03,785 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:03,792 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@4c816317, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:03,793 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-31 22:01:03,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:01:03,797 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:01:03,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:03,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:03,798 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:01:03,799 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:03,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 476732, now seen corresponding path program 1 times [2024-10-31 22:01:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:03,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832365866] [2024-10-31 22:01:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:04,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:04,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832365866] [2024-10-31 22:01:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832365866] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:04,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:04,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:01:04,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718286401] [2024-10-31 22:01:04,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:04,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:01:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:01:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:01:04,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-31 22:01:04,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:04,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:04,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-31 22:01:04,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:04,573 INFO L124 PetriNetUnfolderBase]: 503/898 cut-off events. [2024-10-31 22:01:04,573 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-31 22:01:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1798 conditions, 898 events. 503/898 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5629 event pairs, 456 based on Foata normal form. 1/658 useless extension candidates. Maximal degree in co-relation 1698. Up to 778 conditions per place. [2024-10-31 22:01:04,593 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 25 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-10-31 22:01:04,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 150 flow [2024-10-31 22:01:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:01:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:01:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-31 22:01:04,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-10-31 22:01:04,607 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 102 flow. Second operand 3 states and 77 transitions. [2024-10-31 22:01:04,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 150 flow [2024-10-31 22:01:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:01:04,617 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 88 flow [2024-10-31 22:01:04,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-10-31 22:01:04,624 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2024-10-31 22:01:04,624 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 88 flow [2024-10-31 22:01:04,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:04,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:04,625 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:01:04,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:01:04,625 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:04,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash 476733, now seen corresponding path program 1 times [2024-10-31 22:01:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791960300] [2024-10-31 22:01:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:05,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:05,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791960300] [2024-10-31 22:01:05,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791960300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:05,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:05,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:05,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785229777] [2024-10-31 22:01:05,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:05,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:05,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:05,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:05,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:05,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-31 22:01:05,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:05,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:05,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-31 22:01:05,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:05,377 INFO L124 PetriNetUnfolderBase]: 504/901 cut-off events. [2024-10-31 22:01:05,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:05,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 901 events. 504/901 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5649 event pairs, 456 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1719. Up to 783 conditions per place. [2024-10-31 22:01:05,389 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-10-31 22:01:05,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 158 flow [2024-10-31 22:01:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-31 22:01:05,393 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-10-31 22:01:05,394 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 88 flow. Second operand 4 states and 96 transitions. [2024-10-31 22:01:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 158 flow [2024-10-31 22:01:05,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:05,398 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 111 flow [2024-10-31 22:01:05,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-10-31 22:01:05,402 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2024-10-31 22:01:05,402 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 111 flow [2024-10-31 22:01:05,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:05,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:05,403 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:01:05,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:01:05,404 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:05,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 458154905, now seen corresponding path program 1 times [2024-10-31 22:01:05,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:05,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443581057] [2024-10-31 22:01:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:05,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443581057] [2024-10-31 22:01:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443581057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:05,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837826818] [2024-10-31 22:01:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:05,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:05,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:05,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:01:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:05,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:01:05,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:05,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-10-31 22:01:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:06,264 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:06,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837826818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:06,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:01:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526742736] [2024-10-31 22:01:06,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:06,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:01:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:01:06,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:01:06,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-31 22:01:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 111 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:06,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-31 22:01:06,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:07,049 INFO L124 PetriNetUnfolderBase]: 504/900 cut-off events. [2024-10-31 22:01:07,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:07,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 900 events. 504/900 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 5626 event pairs, 456 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1726. Up to 779 conditions per place. [2024-10-31 22:01:07,058 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-10-31 22:01:07,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 167 flow [2024-10-31 22:01:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:01:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:01:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-10-31 22:01:07,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4601449275362319 [2024-10-31 22:01:07,061 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 111 flow. Second operand 6 states and 127 transitions. [2024-10-31 22:01:07,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 167 flow [2024-10-31 22:01:07,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:01:07,065 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 118 flow [2024-10-31 22:01:07,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-10-31 22:01:07,066 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2024-10-31 22:01:07,067 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 118 flow [2024-10-31 22:01:07,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,068 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:07,068 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:07,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:01:07,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:07,269 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:07,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:07,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1146846480, now seen corresponding path program 1 times [2024-10-31 22:01:07,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:07,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445613344] [2024-10-31 22:01:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:07,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445613344] [2024-10-31 22:01:07,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445613344] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:07,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318043629] [2024-10-31 22:01:07,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:07,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:07,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-31 22:01:07,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:07,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-31 22:01:07,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:07,537 INFO L124 PetriNetUnfolderBase]: 360/653 cut-off events. [2024-10-31 22:01:07,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:07,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 653 events. 360/653 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3677 event pairs, 319 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1248. Up to 559 conditions per place. [2024-10-31 22:01:07,545 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 25 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-10-31 22:01:07,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 170 flow [2024-10-31 22:01:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-10-31 22:01:07,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4945652173913043 [2024-10-31 22:01:07,550 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 118 flow. Second operand 4 states and 91 transitions. [2024-10-31 22:01:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 170 flow [2024-10-31 22:01:07,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 140 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:01:07,553 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 90 flow [2024-10-31 22:01:07,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-10-31 22:01:07,555 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2024-10-31 22:01:07,556 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 90 flow [2024-10-31 22:01:07,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:07,557 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:07,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:01:07,558 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:07,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1146846481, now seen corresponding path program 1 times [2024-10-31 22:01:07,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:07,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905899239] [2024-10-31 22:01:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905899239] [2024-10-31 22:01:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905899239] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:07,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129393191] [2024-10-31 22:01:07,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:07,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:07,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-10-31 22:01:07,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:07,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-10-31 22:01:07,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:07,842 INFO L124 PetriNetUnfolderBase]: 478/899 cut-off events. [2024-10-31 22:01:07,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:07,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 899 events. 478/899 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5261 event pairs, 436 based on Foata normal form. 33/800 useless extension candidates. Maximal degree in co-relation 1240. Up to 562 conditions per place. [2024-10-31 22:01:07,848 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 41 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-10-31 22:01:07,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 216 flow [2024-10-31 22:01:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-10-31 22:01:07,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-10-31 22:01:07,851 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 90 flow. Second operand 4 states and 116 transitions. [2024-10-31 22:01:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 216 flow [2024-10-31 22:01:07,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:07,852 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 101 flow [2024-10-31 22:01:07,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-10-31 22:01:07,853 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2024-10-31 22:01:07,853 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 101 flow [2024-10-31 22:01:07,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:07,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:07,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:01:07,854 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:07,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:07,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1555310283, now seen corresponding path program 1 times [2024-10-31 22:01:07,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:07,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448657119] [2024-10-31 22:01:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:07,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:08,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448657119] [2024-10-31 22:01:08,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448657119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119487300] [2024-10-31 22:01:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:08,102 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:08,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:01:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:08,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:01:08,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:08,307 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:01:08,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119487300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:08,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:01:08,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-10-31 22:01:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382646494] [2024-10-31 22:01:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:08,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:01:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:08,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:01:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:01:08,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-10-31 22:01:08,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:08,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-10-31 22:01:08,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:08,458 INFO L124 PetriNetUnfolderBase]: 358/692 cut-off events. [2024-10-31 22:01:08,458 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-31 22:01:08,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1390 conditions, 692 events. 358/692 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3741 event pairs, 323 based on Foata normal form. 0/624 useless extension candidates. Maximal degree in co-relation 904. Up to 583 conditions per place. [2024-10-31 22:01:08,463 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-10-31 22:01:08,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 145 flow [2024-10-31 22:01:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-10-31 22:01:08,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2024-10-31 22:01:08,465 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 101 flow. Second operand 4 states and 93 transitions. [2024-10-31 22:01:08,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 145 flow [2024-10-31 22:01:08,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:08,466 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 94 flow [2024-10-31 22:01:08,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-10-31 22:01:08,469 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2024-10-31 22:01:08,469 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 94 flow [2024-10-31 22:01:08,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:08,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:08,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:01:08,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:08,678 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:08,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2108408073, now seen corresponding path program 1 times [2024-10-31 22:01:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556057928] [2024-10-31 22:01:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556057928] [2024-10-31 22:01:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556057928] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:08,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:08,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:01:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649742030] [2024-10-31 22:01:08,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:08,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:09,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-31 22:01:09,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-31 22:01:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:09,322 INFO L124 PetriNetUnfolderBase]: 718/1282 cut-off events. [2024-10-31 22:01:09,322 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-10-31 22:01:09,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1282 events. 718/1282 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6546 event pairs, 145 based on Foata normal form. 78/1333 useless extension candidates. Maximal degree in co-relation 1748. Up to 576 conditions per place. [2024-10-31 22:01:09,330 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 55 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2024-10-31 22:01:09,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 290 flow [2024-10-31 22:01:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:01:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:01:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-10-31 22:01:09,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5608695652173913 [2024-10-31 22:01:09,331 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 94 flow. Second operand 5 states and 129 transitions. [2024-10-31 22:01:09,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 290 flow [2024-10-31 22:01:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:09,334 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2024-10-31 22:01:09,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-31 22:01:09,335 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2024-10-31 22:01:09,335 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2024-10-31 22:01:09,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:09,336 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:09,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:01:09,336 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:09,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 253174661, now seen corresponding path program 2 times [2024-10-31 22:01:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986079649] [2024-10-31 22:01:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986079649] [2024-10-31 22:01:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986079649] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:09,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:09,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:01:09,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619058198] [2024-10-31 22:01:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:09,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:01:09,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:01:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:01:09,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-31 22:01:09,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:09,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-31 22:01:09,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:09,871 INFO L124 PetriNetUnfolderBase]: 1131/1929 cut-off events. [2024-10-31 22:01:09,871 INFO L125 PetriNetUnfolderBase]: For 728/750 co-relation queries the response was YES. [2024-10-31 22:01:09,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4481 conditions, 1929 events. 1131/1929 cut-off events. For 728/750 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10486 event pairs, 509 based on Foata normal form. 25/1863 useless extension candidates. Maximal degree in co-relation 3765. Up to 840 conditions per place. [2024-10-31 22:01:09,884 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 49 selfloop transitions, 4 changer transitions 5/69 dead transitions. [2024-10-31 22:01:09,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 322 flow [2024-10-31 22:01:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:01:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:01:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-10-31 22:01:09,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5695652173913044 [2024-10-31 22:01:09,886 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 5 states and 131 transitions. [2024-10-31 22:01:09,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 322 flow [2024-10-31 22:01:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:01:09,893 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 140 flow [2024-10-31 22:01:09,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-10-31 22:01:09,894 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-10-31 22:01:09,894 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 140 flow [2024-10-31 22:01:09,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:09,894 INFO L204 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] [2024-10-31 22:01:09,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:01:09,895 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:09,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1541404730, now seen corresponding path program 1 times [2024-10-31 22:01:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531963322] [2024-10-31 22:01:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:01:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531963322] [2024-10-31 22:01:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531963322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:09,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:09,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:09,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455567789] [2024-10-31 22:01:09,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:09,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:01:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:09,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:01:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:01:09,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-10-31 22:01:09,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:09,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-10-31 22:01:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:10,212 INFO L124 PetriNetUnfolderBase]: 647/1258 cut-off events. [2024-10-31 22:01:10,214 INFO L125 PetriNetUnfolderBase]: For 488/532 co-relation queries the response was YES. [2024-10-31 22:01:10,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1258 events. 647/1258 cut-off events. For 488/532 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7062 event pairs, 266 based on Foata normal form. 45/1190 useless extension candidates. Maximal degree in co-relation 2814. Up to 716 conditions per place. [2024-10-31 22:01:10,222 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 30 selfloop transitions, 2 changer transitions 7/55 dead transitions. [2024-10-31 22:01:10,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 257 flow [2024-10-31 22:01:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:01:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:01:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-31 22:01:10,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-10-31 22:01:10,223 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 140 flow. Second operand 3 states and 89 transitions. [2024-10-31 22:01:10,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 257 flow [2024-10-31 22:01:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:10,227 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 150 flow [2024-10-31 22:01:10,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-10-31 22:01:10,229 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-10-31 22:01:10,230 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 150 flow [2024-10-31 22:01:10,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:10,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:10,232 INFO L204 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] [2024-10-31 22:01:10,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:01:10,232 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:10,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash -844247355, now seen corresponding path program 1 times [2024-10-31 22:01:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:10,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768539652] [2024-10-31 22:01:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:10,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:11,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:11,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768539652] [2024-10-31 22:01:11,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768539652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:11,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106951327] [2024-10-31 22:01:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:11,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:11,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:11,145 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:11,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:01:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:11,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:01:11,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:11,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:12,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:01:12,032 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 28 treesize of output 20 [2024-10-31 22:01:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:12,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106951327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:12,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-10-31 22:01:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204855775] [2024-10-31 22:01:12,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:12,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-31 22:01:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-31 22:01:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:01:12,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-31 22:01:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 150 flow. Second operand has 28 states, 28 states have (on average 16.785714285714285) internal successors, (470), 28 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-31 22:01:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:16,824 INFO L124 PetriNetUnfolderBase]: 4762/8040 cut-off events. [2024-10-31 22:01:16,825 INFO L125 PetriNetUnfolderBase]: For 5789/5906 co-relation queries the response was YES. [2024-10-31 22:01:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20282 conditions, 8040 events. 4762/8040 cut-off events. For 5789/5906 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 53521 event pairs, 320 based on Foata normal form. 110/7575 useless extension candidates. Maximal degree in co-relation 11775. Up to 1018 conditions per place. [2024-10-31 22:01:16,875 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 205 selfloop transitions, 54 changer transitions 175/443 dead transitions. [2024-10-31 22:01:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 443 transitions, 2359 flow [2024-10-31 22:01:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-31 22:01:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-10-31 22:01:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 997 transitions. [2024-10-31 22:01:16,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5286320254506893 [2024-10-31 22:01:16,881 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 150 flow. Second operand 41 states and 997 transitions. [2024-10-31 22:01:16,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 443 transitions, 2359 flow [2024-10-31 22:01:16,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 443 transitions, 2285 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:16,896 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 580 flow [2024-10-31 22:01:16,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=580, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-10-31 22:01:16,899 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 61 predicate places. [2024-10-31 22:01:16,899 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 580 flow [2024-10-31 22:01:16,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 16.785714285714285) internal successors, (470), 28 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:16,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:16,903 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:16,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:01:17,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:01:17,104 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:17,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -793771378, now seen corresponding path program 2 times [2024-10-31 22:01:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:17,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638248455] [2024-10-31 22:01:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:17,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:17,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:17,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638248455] [2024-10-31 22:01:17,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638248455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:17,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404904310] [2024-10-31 22:01:17,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:01:17,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:17,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:17,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:17,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:01:17,443 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:01:17,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:17,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:01:17,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:17,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:18,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404904310] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:18,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:18,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-31 22:01:18,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041713817] [2024-10-31 22:01:18,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:18,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:01:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:01:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:01:18,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-10-31 22:01:18,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 580 flow. Second operand has 17 states, 17 states have (on average 20.647058823529413) internal successors, (351), 17 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:18,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:18,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-10-31 22:01:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:19,228 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([456] L48-7-->thread1EXIT: Formula: (and (= |v_thread1Thread1of1ForFork0_#res#1.offset_1| 0) (= |v_thread1Thread1of1ForFork0_#res#1.base_1| 0)) InVars {} OutVars{thread1Thread1of1ForFork0_~w~0#1=|v_thread1Thread1of1ForFork0_~w~0#1_7|, thread1Thread1of1ForFork0_#res#1.offset=|v_thread1Thread1of1ForFork0_#res#1.offset_1|, thread1Thread1of1ForFork0_#res#1.base=|v_thread1Thread1of1ForFork0_#res#1.base_1|} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#res#1.offset, thread1Thread1of1ForFork0_~w~0#1, thread1Thread1of1ForFork0_#res#1.base][113], [Black: 408#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1)) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 424#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (= ~v_assert~0 1) (<= ~d~0 ~W~0) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 436#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0) (or (< ~back~0 0) (= ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1))), Black: 452#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (<= ~d~0 ~W~0) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 418#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0)), Black: 428#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0)), Black: 462#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 422#(and (= |thread2Thread1of1ForFork1_~temp~0#1| 1) (or (and (= ~queue~0.offset 0) (= ~front~0 0)) (not (= ~back~0 0))) (= ~d~0 0) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (<= 1 ~W~0) (or (not (= ~back~0 0)) (< |thread1Thread1of1ForFork0_~w~0#1| (+ ~W~0 1)))), Black: 434#(and (<= ~d~0 1) (= ~v_assert~0 1) (<= 1 ~W~0)), Black: 410#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1))) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 414#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0) (or (not (= ~back~0 0)) (< |thread1Thread1of1ForFork0_~w~0#1| (+ ~W~0 1)))), Black: 432#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (<= ~d~0 ~W~0)), Black: 154#(and (<= (div |thread2Thread1of1ForFork1_~cond~1#1| 256) 0) (<= 1 |thread2Thread1of1ForFork1_~cond~1#1|)), Black: 156#(and (<= (div |thread2Thread1of1ForFork1_~cond~1#1| 256) 0) (<= 1 |thread2Thread1of1ForFork1_~cond~1#1|) (= ~v_assert~0 1)), Black: 398#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= ~back~0 ~front~0) (= ~v_assert~0 1) (or (= ~d~0 0) (not (= ~back~0 0))) (<= ~d~0 0) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 153#(= ~v_assert~0 1), Black: 404#(and (= ~back~0 ~front~0) (= ~v_assert~0 1) (<= |thread1Thread1of1ForFork0_~w~0#1| ~W~0) (or (= ~d~0 0) (not (= ~back~0 0))) (<= ~d~0 ~W~0) (= ~queue~0.offset 0) (<= ~d~0 0) (<= ~n~0 1)), Black: 420#(and (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1)) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 448#(and (= ~v_assert~0 1) (<= ~d~0 ~W~0)), Black: 416#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (= ~v_assert~0 1) (<= ~d~0 ~W~0)), Black: 402#(and (= ~v_assert~0 1) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), 110#(= (select |#valid| ~queue~0.base) 1), 3#L78true, Black: 164#(and (<= 1 ~v_assert~0) (<= (div ~v_assert~0 256) 0)), 269#(= ~v_assert~0 1), 484#true, Black: 168#(and (<= 1 ~v_assert~0) (= ~d~0 0) (<= (div ~v_assert~0 256) 0) (<= 0 ~W~0)), Black: 173#(= ~back~0 ~front~0), 40#L110-4true, 12#thread1EXITtrue, 35#thread3EXITtrue, 135#(and (<= 0 ~queue~0.offset) (<= (+ (* ~n~0 4) ~queue~0.offset) (select |#length| ~queue~0.base)))]) [2024-10-31 22:01:19,228 INFO L294 olderBase$Statistics]: this new event has 37 ancestors and is cut-off event [2024-10-31 22:01:19,228 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-10-31 22:01:19,229 INFO L297 olderBase$Statistics]: existing Event has 31 ancestors and is cut-off event [2024-10-31 22:01:19,229 INFO L297 olderBase$Statistics]: existing Event has 33 ancestors and is cut-off event [2024-10-31 22:01:19,242 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([456] L48-7-->thread1EXIT: Formula: (and (= |v_thread1Thread1of1ForFork0_#res#1.offset_1| 0) (= |v_thread1Thread1of1ForFork0_#res#1.base_1| 0)) InVars {} OutVars{thread1Thread1of1ForFork0_~w~0#1=|v_thread1Thread1of1ForFork0_~w~0#1_7|, thread1Thread1of1ForFork0_#res#1.offset=|v_thread1Thread1of1ForFork0_#res#1.offset_1|, thread1Thread1of1ForFork0_#res#1.base=|v_thread1Thread1of1ForFork0_#res#1.base_1|} AuxVars[] AssignedVars[thread1Thread1of1ForFork0_#res#1.offset, thread1Thread1of1ForFork0_~w~0#1, thread1Thread1of1ForFork0_#res#1.base][113], [32#L111true, Black: 408#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1)) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 424#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (= ~v_assert~0 1) (<= ~d~0 ~W~0) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 436#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0) (or (< ~back~0 0) (= ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1))), Black: 452#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (<= ~d~0 ~W~0) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 418#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0)), Black: 428#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0)), Black: 462#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1) (and (= ~back~0 ~front~0) (<= (+ ~d~0 1) ~W~0)))), Black: 422#(and (= |thread2Thread1of1ForFork1_~temp~0#1| 1) (or (and (= ~queue~0.offset 0) (= ~front~0 0)) (not (= ~back~0 0))) (= ~d~0 0) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (<= 1 ~W~0) (or (not (= ~back~0 0)) (< |thread1Thread1of1ForFork0_~w~0#1| (+ ~W~0 1)))), Black: 434#(and (<= ~d~0 1) (= ~v_assert~0 1) (<= 1 ~W~0)), Black: 410#(and (= ~v_assert~0 1) (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1))) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 414#(and (= ~d~0 0) (= (select (select |#memory_int#1| ~queue~0.base) 0) 1) (= ~v_assert~0 1) (or (< ~back~0 1) (< ~n~0 2)) (= ~queue~0.offset 0) (= ~front~0 0) (<= 1 ~W~0) (or (not (= ~back~0 0)) (< |thread1Thread1of1ForFork0_~w~0#1| (+ ~W~0 1)))), Black: 432#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (<= ~d~0 ~W~0)), Black: 154#(and (<= (div |thread2Thread1of1ForFork1_~cond~1#1| 256) 0) (<= 1 |thread2Thread1of1ForFork1_~cond~1#1|)), Black: 156#(and (<= (div |thread2Thread1of1ForFork1_~cond~1#1| 256) 0) (<= 1 |thread2Thread1of1ForFork1_~cond~1#1|) (= ~v_assert~0 1)), Black: 398#(and (<= |ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) (<= ~n~0 |ULTIMATE.start_create_fresh_int_array_~size#1|) (= ~back~0 ~front~0) (= ~v_assert~0 1) (or (= ~d~0 0) (not (= ~back~0 0))) (<= ~d~0 0) (= |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| 0)), Black: 153#(= ~v_assert~0 1), Black: 404#(and (= ~back~0 ~front~0) (= ~v_assert~0 1) (<= |thread1Thread1of1ForFork0_~w~0#1| ~W~0) (or (= ~d~0 0) (not (= ~back~0 0))) (<= ~d~0 ~W~0) (= ~queue~0.offset 0) (<= ~d~0 0) (<= ~n~0 1)), Black: 420#(and (or (< ~back~0 0) (< ~d~0 ~W~0) (< ~n~0 (+ ~back~0 1)) (< |thread1Thread1of1ForFork0_~w~0#1| 1)) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), Black: 448#(and (= ~v_assert~0 1) (<= ~d~0 ~W~0)), Black: 416#(and (<= (+ ~d~0 (select (select |#memory_int#1| ~queue~0.base) (+ (* ~front~0 4) ~queue~0.offset))) ~W~0) (= ~v_assert~0 1) (<= ~d~0 ~W~0)), Black: 402#(and (= ~v_assert~0 1) (or (< ~back~0 0) (and (= ~back~0 ~front~0) (<= ~d~0 0)) (< ~n~0 (+ ~back~0 1)))), 110#(= (select |#valid| ~queue~0.base) 1), 3#L78true, Black: 164#(and (<= 1 ~v_assert~0) (<= (div ~v_assert~0 256) 0)), 269#(= ~v_assert~0 1), Black: 168#(and (<= 1 ~v_assert~0) (= ~d~0 0) (<= (div ~v_assert~0 256) 0) (<= 0 ~W~0)), 484#true, Black: 173#(= ~back~0 ~front~0), 35#thread3EXITtrue, 12#thread1EXITtrue, 135#(and (<= 0 ~queue~0.offset) (<= (+ (* ~n~0 4) ~queue~0.offset) (select |#length| ~queue~0.base)))]) [2024-10-31 22:01:19,242 INFO L294 olderBase$Statistics]: this new event has 38 ancestors and is cut-off event [2024-10-31 22:01:19,243 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2024-10-31 22:01:19,243 INFO L297 olderBase$Statistics]: existing Event has 32 ancestors and is cut-off event [2024-10-31 22:01:19,243 INFO L297 olderBase$Statistics]: existing Event has 34 ancestors and is cut-off event [2024-10-31 22:01:19,266 INFO L124 PetriNetUnfolderBase]: 1871/3500 cut-off events. [2024-10-31 22:01:19,266 INFO L125 PetriNetUnfolderBase]: For 15734/15862 co-relation queries the response was YES. [2024-10-31 22:01:19,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11532 conditions, 3500 events. 1871/3500 cut-off events. For 15734/15862 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23074 event pairs, 445 based on Foata normal form. 140/3330 useless extension candidates. Maximal degree in co-relation 10046. Up to 1547 conditions per place. [2024-10-31 22:01:19,292 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 43 selfloop transitions, 6 changer transitions 60/133 dead transitions. [2024-10-31 22:01:19,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 133 transitions, 867 flow [2024-10-31 22:01:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:01:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:01:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-10-31 22:01:19,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2024-10-31 22:01:19,294 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 580 flow. Second operand 9 states and 224 transitions. [2024-10-31 22:01:19,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 133 transitions, 867 flow [2024-10-31 22:01:19,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 819 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-10-31 22:01:19,333 INFO L231 Difference]: Finished difference. Result has 102 places, 67 transitions, 358 flow [2024-10-31 22:01:19,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=358, PETRI_PLACES=102, PETRI_TRANSITIONS=67} [2024-10-31 22:01:19,334 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 54 predicate places. [2024-10-31 22:01:19,335 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 67 transitions, 358 flow [2024-10-31 22:01:19,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.647058823529413) internal successors, (351), 17 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:19,336 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:19,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:01:19,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:19,537 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:19,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1382053874, now seen corresponding path program 3 times [2024-10-31 22:01:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671147621] [2024-10-31 22:01:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:19,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:01:19,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671147621] [2024-10-31 22:01:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671147621] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932323345] [2024-10-31 22:01:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:01:19,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:19,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:19,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:19,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:01:19,770 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:01:19,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:19,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:01:19,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:01:19,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:01:19,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932323345] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:19,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:19,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-31 22:01:19,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747295324] [2024-10-31 22:01:19,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:19,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:01:19,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:19,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:01:19,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:01:19,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-10-31 22:01:19,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 67 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:19,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-10-31 22:01:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:20,936 INFO L124 PetriNetUnfolderBase]: 3093/5681 cut-off events. [2024-10-31 22:01:20,936 INFO L125 PetriNetUnfolderBase]: For 25715/26020 co-relation queries the response was YES. [2024-10-31 22:01:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18406 conditions, 5681 events. 3093/5681 cut-off events. For 25715/26020 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 39404 event pairs, 762 based on Foata normal form. 184/5390 useless extension candidates. Maximal degree in co-relation 18358. Up to 1655 conditions per place. [2024-10-31 22:01:20,989 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 89 selfloop transitions, 6 changer transitions 6/125 dead transitions. [2024-10-31 22:01:20,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 125 transitions, 816 flow [2024-10-31 22:01:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-31 22:01:20,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2024-10-31 22:01:20,990 INFO L175 Difference]: Start difference. First operand has 102 places, 67 transitions, 358 flow. Second operand 4 states and 125 transitions. [2024-10-31 22:01:20,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 125 transitions, 816 flow [2024-10-31 22:01:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 125 transitions, 761 flow, removed 22 selfloop flow, removed 13 redundant places. [2024-10-31 22:01:21,037 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 380 flow [2024-10-31 22:01:21,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-10-31 22:01:21,038 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 28 predicate places. [2024-10-31 22:01:21,038 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 380 flow [2024-10-31 22:01:21,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:21,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:21,038 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:21,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:01:21,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:01:21,239 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:01:21,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -685522565, now seen corresponding path program 4 times [2024-10-31 22:01:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774107056] [2024-10-31 22:01:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:22,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774107056] [2024-10-31 22:01:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774107056] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806272009] [2024-10-31 22:01:22,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:01:22,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:22,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:22,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:22,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ad043d-aaa9-4a70-9886-3a56f0a449f0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:01:22,983 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:01:22,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:22,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-31 22:01:22,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:24,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:25,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:01:25,122 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-10-31 22:01:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806272009] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:25,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:25,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-31 22:01:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056122291] [2024-10-31 22:01:25,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:25,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-31 22:01:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-31 22:01:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2024-10-31 22:01:26,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-31 22:01:26,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 380 flow. Second operand has 43 states, 43 states have (on average 16.302325581395348) internal successors, (701), 43 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:26,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:26,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-31 22:01:26,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand