./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/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_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/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_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:13:10,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:13:10,368 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:13:10,372 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:13:10,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:13:10,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:13:10,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:13:10,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:13:10,408 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:13:10,409 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:13:10,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:13:10,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:13:10,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:13:10,412 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:13:10,413 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:13:10,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:13:10,413 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:13:10,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:13:10,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:13:10,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:13:10,419 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:13:10,419 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:13:10,420 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:13:10,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:13:10,420 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:13:10,421 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:13:10,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:13:10,421 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:13:10,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:13:10,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:13:10,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:13:10,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:13:10,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:13:10,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:10,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:13:10,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:13:10,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:13:10,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:13:10,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:13:10,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:13:10,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:13:10,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:13:10,428 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_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-31 22:13:10,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:13:10,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:13:10,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:13:10,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:13:10,768 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:13:10,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c Unable to find full path for "g++" [2024-10-31 22:13:12,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:13:12,970 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:13:12,971 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-31 22:13:12,979 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/data/adae5ff49/4e6ad0b04dcf4e639e05e47f7fedf6d4/FLAGb2d62c895 [2024-10-31 22:13:12,992 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/data/adae5ff49/4e6ad0b04dcf4e639e05e47f7fedf6d4 [2024-10-31 22:13:12,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:13:12,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:13:12,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:12,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:13:13,007 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:13:13,008 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:12" (1/1) ... [2024-10-31 22:13:13,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d4a4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13, skipping insertion in model container [2024-10-31 22:13:13,009 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:13:12" (1/1) ... [2024-10-31 22:13:13,037 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:13:13,296 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 22:13:13,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:13,309 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:13:13,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:13:13,359 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:13:13,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13 WrapperNode [2024-10-31 22:13:13,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:13:13,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:13,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:13:13,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:13:13,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,400 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2024-10-31 22:13:13,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:13:13,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:13:13,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:13:13,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:13:13,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,432 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:13:13,433 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,441 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:13:13,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:13:13,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:13:13,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:13:13,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (1/1) ... [2024-10-31 22:13:13,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:13:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:13,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:13:13,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:13:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:13:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:13:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:13:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:13:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:13:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:13:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:13:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:13:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:13:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:13:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:13:13,515 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 22:13:13,611 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:13:13,612 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:13:13,953 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:13:13,953 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:13:14,299 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:13:14,300 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:13:14,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:14 BoogieIcfgContainer [2024-10-31 22:13:14,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:13:14,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:13:14,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:13:14,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:13:14,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:13:12" (1/3) ... [2024-10-31 22:13:14,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168b6f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:14, skipping insertion in model container [2024-10-31 22:13:14,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:13:13" (2/3) ... [2024-10-31 22:13:14,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@168b6f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:13:14, skipping insertion in model container [2024-10-31 22:13:14,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:13:14" (3/3) ... [2024-10-31 22:13:14,310 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-10-31 22:13:14,331 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:13:14,332 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-31 22:13:14,332 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:13:14,409 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:13:14,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 45 transitions, 104 flow [2024-10-31 22:13:14,502 INFO L124 PetriNetUnfolderBase]: 5/43 cut-off events. [2024-10-31 22:13:14,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:13:14,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 5/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 83 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-10-31 22:13:14,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 45 transitions, 104 flow [2024-10-31 22:13:14,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 96 flow [2024-10-31 22:13:14,526 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:13:14,534 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;@110975c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:13:14,534 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-31 22:13:14,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:13:14,542 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:13:14,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:13:14,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:14,544 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:13:14,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:14,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 454927, now seen corresponding path program 1 times [2024-10-31 22:13:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:14,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851635311] [2024-10-31 22:13:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:14,886 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 22:13:14,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:14,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851635311] [2024-10-31 22:13:14,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851635311] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:14,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:14,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:13:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555884924] [2024-10-31 22:13:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:14,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:14,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-31 22:13:14,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 22:13:14,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:14,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-31 22:13:14,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:15,135 INFO L124 PetriNetUnfolderBase]: 230/396 cut-off events. [2024-10-31 22:13:15,136 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-31 22:13:15,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 396 events. 230/396 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1692 event pairs, 152 based on Foata normal form. 1/278 useless extension candidates. Maximal degree in co-relation 690. Up to 357 conditions per place. [2024-10-31 22:13:15,143 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 26 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-10-31 22:13:15,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 144 flow [2024-10-31 22:13:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-31 22:13:15,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-10-31 22:13:15,159 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 70 transitions. [2024-10-31 22:13:15,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 144 flow [2024-10-31 22:13:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:15,165 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2024-10-31 22:13:15,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-10-31 22:13:15,172 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-10-31 22:13:15,172 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2024-10-31 22:13:15,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 22:13:15,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:15,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:13:15,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:13:15,173 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:15,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash 454928, now seen corresponding path program 1 times [2024-10-31 22:13:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:15,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550395924] [2024-10-31 22:13:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:15,687 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 22:13:15,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550395924] [2024-10-31 22:13:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550395924] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:15,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670458929] [2024-10-31 22:13:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:15,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:15,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:15,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-31 22:13:15,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 22:13:15,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:15,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-31 22:13:15,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:16,029 INFO L124 PetriNetUnfolderBase]: 231/399 cut-off events. [2024-10-31 22:13:16,029 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:13:16,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 399 events. 231/399 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1696 event pairs, 152 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 751. Up to 362 conditions per place. [2024-10-31 22:13:16,036 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-10-31 22:13:16,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 156 flow [2024-10-31 22:13:16,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-31 22:13:16,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-10-31 22:13:16,040 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 85 transitions. [2024-10-31 22:13:16,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 156 flow [2024-10-31 22:13:16,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:16,045 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 107 flow [2024-10-31 22:13:16,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2024-10-31 22:13:16,046 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-10-31 22:13:16,046 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 107 flow [2024-10-31 22:13:16,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 22:13:16,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:16,048 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:13:16,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:13:16,049 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:16,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 437199637, now seen corresponding path program 1 times [2024-10-31 22:13:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:16,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874677357] [2024-10-31 22:13:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:16,429 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 22:13:16,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874677357] [2024-10-31 22:13:16,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874677357] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:16,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671464858] [2024-10-31 22:13:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:16,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:16,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:16,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:13:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:16,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:13:16,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:16,638 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 22:13:16,950 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 22:13:16,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:17,114 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 22:13:17,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671464858] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:17,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:17,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:13:17,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174658325] [2024-10-31 22:13:17,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:17,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:13:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:13:17,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:13:17,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-31 22:13:17,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 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 22:13:17,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:17,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-31 22:13:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:17,567 INFO L124 PetriNetUnfolderBase]: 231/398 cut-off events. [2024-10-31 22:13:17,568 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-31 22:13:17,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 398 events. 231/398 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1687 event pairs, 152 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 758. Up to 358 conditions per place. [2024-10-31 22:13:17,573 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 24 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-10-31 22:13:17,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 165 flow [2024-10-31 22:13:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:13:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:13:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-10-31 22:13:17,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-10-31 22:13:17,576 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 107 flow. Second operand 6 states and 110 transitions. [2024-10-31 22:13:17,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 165 flow [2024-10-31 22:13:17,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:17,579 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 114 flow [2024-10-31 22:13:17,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-10-31 22:13:17,584 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-31 22:13:17,584 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 114 flow [2024-10-31 22:13:17,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 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 22:13:17,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:17,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:17,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:13:17,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:17,789 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:17,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:17,790 INFO L85 PathProgramCache]: Analyzing trace with hash -681312346, now seen corresponding path program 1 times [2024-10-31 22:13:17,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:17,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240319142] [2024-10-31 22:13:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:17,916 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 22:13:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240319142] [2024-10-31 22:13:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240319142] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:17,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:17,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:17,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500232275] [2024-10-31 22:13:17,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:17,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:17,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-31 22:13:17,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:17,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:17,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-31 22:13:17,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:18,051 INFO L124 PetriNetUnfolderBase]: 201/349 cut-off events. [2024-10-31 22:13:18,051 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-10-31 22:13:18,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 349 events. 201/349 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1423 event pairs, 130 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 662. Up to 309 conditions per place. [2024-10-31 22:13:18,054 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 26 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-10-31 22:13:18,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 166 flow [2024-10-31 22:13:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-10-31 22:13:18,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-10-31 22:13:18,056 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 114 flow. Second operand 4 states and 77 transitions. [2024-10-31 22:13:18,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 166 flow [2024-10-31 22:13:18,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 136 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:13:18,058 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 84 flow [2024-10-31 22:13:18,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=84, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-10-31 22:13:18,059 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-10-31 22:13:18,060 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 84 flow [2024-10-31 22:13:18,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:18,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:18,061 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:18,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:13:18,061 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:18,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -681312345, now seen corresponding path program 1 times [2024-10-31 22:13:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293404013] [2024-10-31 22:13:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,140 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 22:13:18,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:18,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293404013] [2024-10-31 22:13:18,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293404013] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:18,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:18,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:18,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346489520] [2024-10-31 22:13:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:18,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:18,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-31 22:13:18,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 22:13:18,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:18,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-31 22:13:18,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:18,305 INFO L124 PetriNetUnfolderBase]: 228/416 cut-off events. [2024-10-31 22:13:18,305 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:13:18,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 416 events. 228/416 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1836 event pairs, 158 based on Foata normal form. 5/324 useless extension candidates. Maximal degree in co-relation 654. Up to 312 conditions per place. [2024-10-31 22:13:18,309 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 38 selfloop transitions, 3 changer transitions 1/50 dead transitions. [2024-10-31 22:13:18,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 198 flow [2024-10-31 22:13:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-10-31 22:13:18,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-10-31 22:13:18,311 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 84 flow. Second operand 4 states and 100 transitions. [2024-10-31 22:13:18,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 198 flow [2024-10-31 22:13:18,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:18,313 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 91 flow [2024-10-31 22:13:18,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=91, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-10-31 22:13:18,314 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-10-31 22:13:18,314 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 91 flow [2024-10-31 22:13:18,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 22:13:18,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:18,315 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:18,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:13:18,315 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:18,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1850320684, now seen corresponding path program 1 times [2024-10-31 22:13:18,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:18,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949853683] [2024-10-31 22:13:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:18,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,559 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 22:13:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:18,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949853683] [2024-10-31 22:13:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949853683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506021737] [2024-10-31 22:13:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:18,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:18,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:13:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:18,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:13:18,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:18,977 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 22:13:18,978 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:13:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506021737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:18,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:13:18,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-10-31 22:13:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120838082] [2024-10-31 22:13:18,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:18,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:13:19,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-31 22:13:19,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 91 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:19,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-31 22:13:19,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:19,242 INFO L124 PetriNetUnfolderBase]: 176/356 cut-off events. [2024-10-31 22:13:19,243 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-10-31 22:13:19,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 356 events. 176/356 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1645 event pairs, 122 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 586. Up to 259 conditions per place. [2024-10-31 22:13:19,246 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 39 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-10-31 22:13:19,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 210 flow [2024-10-31 22:13:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:13:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:13:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-10-31 22:13:19,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47555555555555556 [2024-10-31 22:13:19,248 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 91 flow. Second operand 5 states and 107 transitions. [2024-10-31 22:13:19,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 210 flow [2024-10-31 22:13:19,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:13:19,268 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 94 flow [2024-10-31 22:13:19,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-10-31 22:13:19,269 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-10-31 22:13:19,270 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 94 flow [2024-10-31 22:13:19,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:19,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:19,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:19,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:13:19,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:13:19,476 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:19,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1951822846, now seen corresponding path program 1 times [2024-10-31 22:13:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:19,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289518538] [2024-10-31 22:13:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,711 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 22:13:19,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:19,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289518538] [2024-10-31 22:13:19,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289518538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295910097] [2024-10-31 22:13:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:19,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:13:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:19,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:13:19,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:19,958 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 22:13:19,958 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:13:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295910097] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:19,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:13:19,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-10-31 22:13:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883149012] [2024-10-31 22:13:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:19,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:13:19,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:13:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:13:20,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-31 22:13:20,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 94 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:20,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-31 22:13:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:20,172 INFO L124 PetriNetUnfolderBase]: 198/377 cut-off events. [2024-10-31 22:13:20,172 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-10-31 22:13:20,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 377 events. 198/377 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1643 event pairs, 103 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 684. Up to 253 conditions per place. [2024-10-31 22:13:20,175 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 26 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-10-31 22:13:20,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 171 flow [2024-10-31 22:13:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:13:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:13:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-31 22:13:20,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2024-10-31 22:13:20,177 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 94 flow. Second operand 5 states and 101 transitions. [2024-10-31 22:13:20,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 171 flow [2024-10-31 22:13:20,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:20,179 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 92 flow [2024-10-31 22:13:20,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-31 22:13:20,180 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-10-31 22:13:20,180 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 92 flow [2024-10-31 22:13:20,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:20,180 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:20,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:13:20,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:20,385 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:20,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1801256537, now seen corresponding path program 1 times [2024-10-31 22:13:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:20,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893843235] [2024-10-31 22:13:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:20,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:20,436 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 22:13:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:20,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893843235] [2024-10-31 22:13:20,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893843235] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:20,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:13:20,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999176357] [2024-10-31 22:13:20,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:20,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:20,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:20,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:20,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-31 22:13:20,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 22:13:20,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:20,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-31 22:13:20,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:20,576 INFO L124 PetriNetUnfolderBase]: 249/486 cut-off events. [2024-10-31 22:13:20,576 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-10-31 22:13:20,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 486 events. 249/486 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2286 event pairs, 106 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 889. Up to 232 conditions per place. [2024-10-31 22:13:20,579 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 40 selfloop transitions, 2 changer transitions 3/52 dead transitions. [2024-10-31 22:13:20,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 231 flow [2024-10-31 22:13:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-31 22:13:20,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-10-31 22:13:20,581 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 92 flow. Second operand 3 states and 85 transitions. [2024-10-31 22:13:20,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 231 flow [2024-10-31 22:13:20,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 213 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:13:20,583 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 87 flow [2024-10-31 22:13:20,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-10-31 22:13:20,584 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-10-31 22:13:20,584 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 87 flow [2024-10-31 22:13:20,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 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 22:13:20,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:20,585 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 22:13:20,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:13:20,585 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:20,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:20,586 INFO L85 PathProgramCache]: Analyzing trace with hash 445777422, now seen corresponding path program 1 times [2024-10-31 22:13:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660697444] [2024-10-31 22:13:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:20,707 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 22:13:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660697444] [2024-10-31 22:13:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660697444] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:20,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:20,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261209346] [2024-10-31 22:13:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:20,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:20,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-31 22:13:20,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:20,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-31 22:13:20,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:20,886 INFO L124 PetriNetUnfolderBase]: 311/568 cut-off events. [2024-10-31 22:13:20,887 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-31 22:13:20,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 568 events. 311/568 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2269 event pairs, 85 based on Foata normal form. 20/549 useless extension candidates. Maximal degree in co-relation 1199. Up to 388 conditions per place. [2024-10-31 22:13:20,890 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 43 selfloop transitions, 6 changer transitions 7/61 dead transitions. [2024-10-31 22:13:20,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 61 transitions, 260 flow [2024-10-31 22:13:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-31 22:13:20,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-10-31 22:13:20,891 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 87 flow. Second operand 4 states and 102 transitions. [2024-10-31 22:13:20,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 61 transitions, 260 flow [2024-10-31 22:13:20,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:20,894 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 122 flow [2024-10-31 22:13:20,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-10-31 22:13:20,895 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-10-31 22:13:20,895 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 122 flow [2024-10-31 22:13:20,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:20,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:20,895 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:20,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:13:20,896 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:20,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1312199782, now seen corresponding path program 1 times [2024-10-31 22:13:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102240551] [2024-10-31 22:13:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:13:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102240551] [2024-10-31 22:13:21,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102240551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236960823] [2024-10-31 22:13:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:21,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:21,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:21,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:13:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:21,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:13:21,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:21,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-31 22:13:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:21,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:22,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-10-31 22:13:22,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:13:22,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-10-31 22:13:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236960823] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:22,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:22,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2024-10-31 22:13:22,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801024456] [2024-10-31 22:13:22,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:22,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:13:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:13:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:13:22,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-31 22:13:22,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 122 flow. Second operand has 19 states, 19 states have (on average 15.947368421052632) internal successors, (303), 19 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:22,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:22,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-31 22:13:22,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:27,038 INFO L124 PetriNetUnfolderBase]: 1798/3468 cut-off events. [2024-10-31 22:13:27,039 INFO L125 PetriNetUnfolderBase]: For 1216/1216 co-relation queries the response was YES. [2024-10-31 22:13:27,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7856 conditions, 3468 events. 1798/3468 cut-off events. For 1216/1216 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22072 event pairs, 219 based on Foata normal form. 159/3339 useless extension candidates. Maximal degree in co-relation 4799. Up to 551 conditions per place. [2024-10-31 22:13:27,058 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 218 selfloop transitions, 69 changer transitions 224/516 dead transitions. [2024-10-31 22:13:27,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 516 transitions, 2476 flow [2024-10-31 22:13:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-31 22:13:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-10-31 22:13:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1200 transitions. [2024-10-31 22:13:27,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-10-31 22:13:27,063 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 122 flow. Second operand 56 states and 1200 transitions. [2024-10-31 22:13:27,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 516 transitions, 2476 flow [2024-10-31 22:13:27,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 516 transitions, 2476 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:13:27,074 INFO L231 Difference]: Finished difference. Result has 141 places, 99 transitions, 775 flow [2024-10-31 22:13:27,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=775, PETRI_PLACES=141, PETRI_TRANSITIONS=99} [2024-10-31 22:13:27,076 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-10-31 22:13:27,076 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 99 transitions, 775 flow [2024-10-31 22:13:27,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.947368421052632) internal successors, (303), 19 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:27,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:27,077 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:27,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:13:27,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:13:27,281 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:27,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash 176425519, now seen corresponding path program 1 times [2024-10-31 22:13:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622377636] [2024-10-31 22:13:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:13:27,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622377636] [2024-10-31 22:13:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622377636] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:27,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:13:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695993774] [2024-10-31 22:13:27,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:27,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:13:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:13:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:13:27,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-31 22:13:27,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 99 transitions, 775 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 22:13:27,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:27,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-31 22:13:27,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:27,757 INFO L124 PetriNetUnfolderBase]: 930/1692 cut-off events. [2024-10-31 22:13:27,757 INFO L125 PetriNetUnfolderBase]: For 37899/37915 co-relation queries the response was YES. [2024-10-31 22:13:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8867 conditions, 1692 events. 930/1692 cut-off events. For 37899/37915 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9369 event pairs, 246 based on Foata normal form. 8/1624 useless extension candidates. Maximal degree in co-relation 8140. Up to 1445 conditions per place. [2024-10-31 22:13:27,778 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 84 selfloop transitions, 2 changer transitions 2/93 dead transitions. [2024-10-31 22:13:27,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 93 transitions, 923 flow [2024-10-31 22:13:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:13:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:13:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-10-31 22:13:27,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-10-31 22:13:27,779 INFO L175 Difference]: Start difference. First operand has 141 places, 99 transitions, 775 flow. Second operand 3 states and 76 transitions. [2024-10-31 22:13:27,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 93 transitions, 923 flow [2024-10-31 22:13:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 93 transitions, 723 flow, removed 99 selfloop flow, removed 26 redundant places. [2024-10-31 22:13:27,868 INFO L231 Difference]: Finished difference. Result has 87 places, 75 transitions, 448 flow [2024-10-31 22:13:27,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=87, PETRI_TRANSITIONS=75} [2024-10-31 22:13:27,869 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-10-31 22:13:27,869 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 75 transitions, 448 flow [2024-10-31 22:13:27,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 22:13:27,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:27,870 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] [2024-10-31 22:13:27,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:13:27,870 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:27,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 362370057, now seen corresponding path program 2 times [2024-10-31 22:13:27,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826691974] [2024-10-31 22:13:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:13:28,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:28,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826691974] [2024-10-31 22:13:28,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826691974] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:28,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:28,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:28,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159104330] [2024-10-31 22:13:28,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:28,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:13:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:13:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:13:28,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-31 22:13:28,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 75 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:28,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:28,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-31 22:13:28,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:28,770 INFO L124 PetriNetUnfolderBase]: 1735/3270 cut-off events. [2024-10-31 22:13:28,770 INFO L125 PetriNetUnfolderBase]: For 10785/10785 co-relation queries the response was YES. [2024-10-31 22:13:28,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11281 conditions, 3270 events. 1735/3270 cut-off events. For 10785/10785 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 19509 event pairs, 481 based on Foata normal form. 56/3169 useless extension candidates. Maximal degree in co-relation 10402. Up to 1423 conditions per place. [2024-10-31 22:13:28,799 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 108 selfloop transitions, 35 changer transitions 0/149 dead transitions. [2024-10-31 22:13:28,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 149 transitions, 1218 flow [2024-10-31 22:13:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:13:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:13:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-10-31 22:13:28,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-10-31 22:13:28,801 INFO L175 Difference]: Start difference. First operand has 87 places, 75 transitions, 448 flow. Second operand 5 states and 130 transitions. [2024-10-31 22:13:28,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 149 transitions, 1218 flow [2024-10-31 22:13:28,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 149 transitions, 1196 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-10-31 22:13:28,850 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 852 flow [2024-10-31 22:13:28,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=852, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-10-31 22:13:28,853 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-10-31 22:13:28,853 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 852 flow [2024-10-31 22:13:28,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:28,853 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:28,853 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:13:28,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:13:28,854 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:28,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash -216207299, now seen corresponding path program 3 times [2024-10-31 22:13:28,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:28,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728344230] [2024-10-31 22:13:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:30,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:30,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728344230] [2024-10-31 22:13:30,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728344230] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:30,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178524221] [2024-10-31 22:13:30,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:13:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:30,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:30,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:13:30,210 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:13:30,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:30,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:13:30,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:13:30,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:30,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:13:30,536 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 40 treesize of output 24 [2024-10-31 22:13:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:13:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178524221] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:30,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 4] total 17 [2024-10-31 22:13:30,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690887451] [2024-10-31 22:13:30,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:30,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:13:30,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:13:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:13:30,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-31 22:13:30,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 852 flow. Second operand has 18 states, 18 states have (on average 17.77777777777778) internal successors, (320), 18 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:30,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:30,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-31 22:13:30,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:32,127 INFO L124 PetriNetUnfolderBase]: 1905/3731 cut-off events. [2024-10-31 22:13:32,128 INFO L125 PetriNetUnfolderBase]: For 15728/15746 co-relation queries the response was YES. [2024-10-31 22:13:32,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 3731 events. 1905/3731 cut-off events. For 15728/15746 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 24131 event pairs, 530 based on Foata normal form. 17/3561 useless extension candidates. Maximal degree in co-relation 12753. Up to 1424 conditions per place. [2024-10-31 22:13:32,167 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 116 selfloop transitions, 37 changer transitions 8/170 dead transitions. [2024-10-31 22:13:32,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 170 transitions, 1696 flow [2024-10-31 22:13:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:13:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:13:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-10-31 22:13:32,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2024-10-31 22:13:32,169 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 852 flow. Second operand 10 states and 212 transitions. [2024-10-31 22:13:32,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 170 transitions, 1696 flow [2024-10-31 22:13:32,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 170 transitions, 1650 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-10-31 22:13:32,222 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 1043 flow [2024-10-31 22:13:32,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1043, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2024-10-31 22:13:32,223 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-10-31 22:13:32,223 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 1043 flow [2024-10-31 22:13:32,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.77777777777778) internal successors, (320), 18 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:13:32,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:32,224 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-10-31 22:13:32,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:13:32,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:13:32,427 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:32,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 351990323, now seen corresponding path program 4 times [2024-10-31 22:13:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464315660] [2024-10-31 22:13:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:13:32,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464315660] [2024-10-31 22:13:32,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464315660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:13:32,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:13:32,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:13:32,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033882332] [2024-10-31 22:13:32,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:13:32,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:13:32,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:13:32,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:13:32,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-10-31 22:13:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 1043 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 22:13:32,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:32,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-10-31 22:13:32,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:33,676 INFO L124 PetriNetUnfolderBase]: 2574/4743 cut-off events. [2024-10-31 22:13:33,676 INFO L125 PetriNetUnfolderBase]: For 20051/20099 co-relation queries the response was YES. [2024-10-31 22:13:33,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17833 conditions, 4743 events. 2574/4743 cut-off events. For 20051/20099 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 29782 event pairs, 681 based on Foata normal form. 255/4757 useless extension candidates. Maximal degree in co-relation 14923. Up to 2420 conditions per place. [2024-10-31 22:13:33,706 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 118 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2024-10-31 22:13:33,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 1390 flow [2024-10-31 22:13:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:13:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:13:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-10-31 22:13:33,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-31 22:13:33,708 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 1043 flow. Second operand 4 states and 87 transitions. [2024-10-31 22:13:33,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 1390 flow [2024-10-31 22:13:33,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1321 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-10-31 22:13:33,745 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 852 flow [2024-10-31 22:13:33,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=852, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2024-10-31 22:13:33,746 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-10-31 22:13:33,747 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 852 flow [2024-10-31 22:13:33,747 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 22:13:33,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:33,747 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 22:13:33,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:13:33,747 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:33,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1775845584, now seen corresponding path program 1 times [2024-10-31 22:13:33,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:33,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4081055] [2024-10-31 22:13:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:13:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4081055] [2024-10-31 22:13:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4081055] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636804030] [2024-10-31 22:13:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:33,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:33,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:13:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:34,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:13:34,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:13:34,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:13:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:13:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636804030] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:13:34,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:13:34,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2024-10-31 22:13:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630356342] [2024-10-31 22:13:34,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:13:34,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:13:34,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:13:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:13:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:13:34,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2024-10-31 22:13:34,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 852 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 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 22:13:34,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:13:34,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2024-10-31 22:13:34,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:13:35,903 INFO L124 PetriNetUnfolderBase]: 3937/7114 cut-off events. [2024-10-31 22:13:35,904 INFO L125 PetriNetUnfolderBase]: For 25943/25943 co-relation queries the response was YES. [2024-10-31 22:13:35,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25362 conditions, 7114 events. 3937/7114 cut-off events. For 25943/25943 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 42796 event pairs, 522 based on Foata normal form. 288/7065 useless extension candidates. Maximal degree in co-relation 19245. Up to 1753 conditions per place. [2024-10-31 22:13:35,957 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 57 changer transitions 22/277 dead transitions. [2024-10-31 22:13:35,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 277 transitions, 2501 flow [2024-10-31 22:13:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:13:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-31 22:13:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 320 transitions. [2024-10-31 22:13:35,961 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-31 22:13:35,962 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 852 flow. Second operand 16 states and 320 transitions. [2024-10-31 22:13:35,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 277 transitions, 2501 flow [2024-10-31 22:13:36,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 277 transitions, 2468 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-10-31 22:13:36,004 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 1203 flow [2024-10-31 22:13:36,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1203, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-10-31 22:13:36,005 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-10-31 22:13:36,005 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 1203 flow [2024-10-31 22:13:36,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 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 22:13:36,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:13:36,005 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 22:13:36,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:13:36,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:13:36,207 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:13:36,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:13:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -660184326, now seen corresponding path program 2 times [2024-10-31 22:13:36,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:13:36,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172361356] [2024-10-31 22:13:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:13:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:13:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:13:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:38,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:13:38,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172361356] [2024-10-31 22:13:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172361356] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:13:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003175608] [2024-10-31 22:13:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:13:38,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:13:38,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:13:38,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:13:38,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceb67cac-2a76-4ccd-bc72-cfda0f73143e/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:13:38,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:13:38,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:13:38,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 22:13:38,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:13:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:13:39,208 INFO L311 TraceCheckSpWp]: Computing backward predicates...