./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.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_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/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_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/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_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:00:23,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:00:24,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:00:24,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:00:24,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:00:24,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:00:24,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:00:24,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:00:24,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:00:24,110 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:00:24,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:00:24,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:00:24,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:00:24,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:00:24,112 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:00:24,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:00:24,113 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:00:24,113 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:00:24,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:00:24,117 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:00:24,118 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:00:24,118 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:00:24,122 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:00:24,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:00:24,123 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:00:24,123 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:00:24,124 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:00:24,124 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:00:24,124 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:00:24,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:00:24,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:00:24,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:00:24,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:00:24,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:24,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:00:24,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:00:24,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:00:24,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:00:24,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:00:24,127 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:00:24,127 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:00:24,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:00:24,129 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_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-10-31 22:00:24,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:00:24,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:00:24,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:00:24,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:00:24,485 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:00:24,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c Unable to find full path for "g++" [2024-10-31 22:00:26,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:00:26,909 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:00:26,910 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-31 22:00:26,923 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/data/d4ee34425/1a2c2451c6e24735ba200598d39a18ce/FLAG68ac282a6 [2024-10-31 22:00:27,273 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/data/d4ee34425/1a2c2451c6e24735ba200598d39a18ce [2024-10-31 22:00:27,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:00:27,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:00:27,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:27,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:00:27,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:00:27,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c435ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27, skipping insertion in model container [2024-10-31 22:00:27,295 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,334 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:00:27,592 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 22:00:27,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:27,609 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:00:27,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:00:27,661 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:00:27,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27 WrapperNode [2024-10-31 22:00:27,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:00:27,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:27,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:00:27,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:00:27,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,747 INFO L138 Inliner]: procedures = 23, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 200 [2024-10-31 22:00:27,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:00:27,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:00:27,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:00:27,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:00:27,770 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,811 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 22:00:27,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,844 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,855 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:00:27,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:00:27,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:00:27,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:00:27,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (1/1) ... [2024-10-31 22:00:27,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:00:27,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:27,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:00:27,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:00:27,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:00:27,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:00:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:00:27,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:00:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:00:27,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:00:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:00:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:00:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:00:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:00:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:00:27,952 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 22:00:28,081 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:00:28,083 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:00:28,547 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:00:28,548 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:00:29,060 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:00:29,060 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:00:29,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:29 BoogieIcfgContainer [2024-10-31 22:00:29,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:00:29,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:00:29,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:00:29,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:00:29,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:00:27" (1/3) ... [2024-10-31 22:00:29,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169e1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:29, skipping insertion in model container [2024-10-31 22:00:29,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:00:27" (2/3) ... [2024-10-31 22:00:29,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5169e1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:00:29, skipping insertion in model container [2024-10-31 22:00:29,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:00:29" (3/3) ... [2024-10-31 22:00:29,074 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-10-31 22:00:29,097 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:00:29,097 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-31 22:00:29,098 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:00:29,164 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:00:29,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-10-31 22:00:29,254 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-31 22:00:29,254 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:00:29,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-10-31 22:00:29,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-10-31 22:00:29,263 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 94 flow [2024-10-31 22:00:29,274 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:00:29,282 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;@14dea45e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:00:29,282 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-31 22:00:29,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:00:29,287 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:00:29,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:00:29,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:29,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:29,289 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:29,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 636058, now seen corresponding path program 1 times [2024-10-31 22:00:29,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:29,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738115757] [2024-10-31 22:00:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:29,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:29,753 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 22:00:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738115757] [2024-10-31 22:00:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738115757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:00:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251433762] [2024-10-31 22:00:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:29,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:29,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 22:00:29,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:29,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:30,229 INFO L124 PetriNetUnfolderBase]: 359/589 cut-off events. [2024-10-31 22:00:30,229 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-31 22:00:30,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 589 events. 359/589 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2754 event pairs, 219 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1090. Up to 544 conditions per place. [2024-10-31 22:00:30,259 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-31 22:00:30,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 146 flow [2024-10-31 22:00:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-10-31 22:00:30,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-31 22:00:30,277 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-10-31 22:00:30,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 146 flow [2024-10-31 22:00:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:00:30,285 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 82 flow [2024-10-31 22:00:30,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-10-31 22:00:30,295 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-10-31 22:00:30,296 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 82 flow [2024-10-31 22:00:30,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 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 22:00:30,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:30,296 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:00:30,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:00:30,297 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:30,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:30,298 INFO L85 PathProgramCache]: Analyzing trace with hash 636059, now seen corresponding path program 1 times [2024-10-31 22:00:30,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:30,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693763742] [2024-10-31 22:00:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:30,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:30,656 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 22:00:30,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693763742] [2024-10-31 22:00:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693763742] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:30,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:30,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132883405] [2024-10-31 22:00:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:30,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:30,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:30,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 22:00:30,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:30,953 INFO L124 PetriNetUnfolderBase]: 360/592 cut-off events. [2024-10-31 22:00:30,954 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:00:30,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 592 events. 360/592 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2772 event pairs, 219 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 1132. Up to 553 conditions per place. [2024-10-31 22:00:30,961 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-31 22:00:30,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 40 transitions, 158 flow [2024-10-31 22:00:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-10-31 22:00:30,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-31 22:00:30,966 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 82 flow. Second operand 4 states and 76 transitions. [2024-10-31 22:00:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 40 transitions, 158 flow [2024-10-31 22:00:30,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:30,969 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 105 flow [2024-10-31 22:00:30,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2024-10-31 22:00:30,970 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-10-31 22:00:30,971 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 105 flow [2024-10-31 22:00:30,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 22:00:30,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:30,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:00:30,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:00:30,972 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:30,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 19719872, now seen corresponding path program 1 times [2024-10-31 22:00:30,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:30,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321727468] [2024-10-31 22:00:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:30,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:31,295 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 22:00:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:31,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321727468] [2024-10-31 22:00:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321727468] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:31,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:31,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623653912] [2024-10-31 22:00:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:31,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:31,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:31,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:31,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:31,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:31,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:31,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:31,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:31,547 INFO L124 PetriNetUnfolderBase]: 361/595 cut-off events. [2024-10-31 22:00:31,547 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:00:31,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 595 events. 361/595 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2787 event pairs, 219 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1153. Up to 552 conditions per place. [2024-10-31 22:00:31,552 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 31 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-10-31 22:00:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 187 flow [2024-10-31 22:00:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-10-31 22:00:31,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-10-31 22:00:31,554 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 105 flow. Second operand 5 states and 89 transitions. [2024-10-31 22:00:31,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 187 flow [2024-10-31 22:00:31,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:31,557 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 139 flow [2024-10-31 22:00:31,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-10-31 22:00:31,558 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-10-31 22:00:31,558 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 139 flow [2024-10-31 22:00:31,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:31,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:31,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:00:31,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:00:31,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:31,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash 611272757, now seen corresponding path program 1 times [2024-10-31 22:00:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:31,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137397983] [2024-10-31 22:00:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:31,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:31,935 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 22:00:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137397983] [2024-10-31 22:00:31,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137397983] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784012869] [2024-10-31 22:00:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:31,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:31,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:31,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:00:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:32,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:00:32,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:32,141 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 22:00:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:32,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:32,579 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 22:00:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784012869] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:32,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:32,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:00:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97729676] [2024-10-31 22:00:32,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:32,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:00:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:00:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:00:32,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:32,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 139 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 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 22:00:32,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:32,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:33,242 INFO L124 PetriNetUnfolderBase]: 361/594 cut-off events. [2024-10-31 22:00:33,242 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:00:33,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 594 events. 361/594 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2796 event pairs, 219 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1163. Up to 552 conditions per place. [2024-10-31 22:00:33,249 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-10-31 22:00:33,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 209 flow [2024-10-31 22:00:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:00:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:00:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-10-31 22:00:33,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35984848484848486 [2024-10-31 22:00:33,254 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 139 flow. Second operand 6 states and 95 transitions. [2024-10-31 22:00:33,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 209 flow [2024-10-31 22:00:33,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:33,256 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 148 flow [2024-10-31 22:00:33,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-10-31 22:00:33,260 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2024-10-31 22:00:33,260 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 148 flow [2024-10-31 22:00:33,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 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 22:00:33,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:33,261 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:00:33,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:00:33,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:33,462 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:33,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1770948141, now seen corresponding path program 1 times [2024-10-31 22:00:33,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:33,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009795918] [2024-10-31 22:00:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:33,789 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 22:00:33,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009795918] [2024-10-31 22:00:33,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009795918] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:33,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184964620] [2024-10-31 22:00:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:33,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:33,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:33,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:00:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:33,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:00:33,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:33,901 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 22:00:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:00:34,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:34,419 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 22:00:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184964620] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:34,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:34,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:00:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057239014] [2024-10-31 22:00:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:34,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:00:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:00:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:00:34,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:34,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:34,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:34,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:34,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:35,197 INFO L124 PetriNetUnfolderBase]: 361/593 cut-off events. [2024-10-31 22:00:35,197 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:00:35,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 593 events. 361/593 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2796 event pairs, 219 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 1162. Up to 544 conditions per place. [2024-10-31 22:00:35,203 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 24 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-10-31 22:00:35,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 41 transitions, 216 flow [2024-10-31 22:00:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:00:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:00:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-10-31 22:00:35,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3474025974025974 [2024-10-31 22:00:35,206 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 148 flow. Second operand 7 states and 107 transitions. [2024-10-31 22:00:35,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 41 transitions, 216 flow [2024-10-31 22:00:35,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 182 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-31 22:00:35,211 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 134 flow [2024-10-31 22:00:35,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-10-31 22:00:35,212 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-10-31 22:00:35,214 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 134 flow [2024-10-31 22:00:35,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.307692307692308) internal successors, (147), 13 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:35,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,215 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:00:35,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:35,419 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:35,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -932850567, now seen corresponding path program 1 times [2024-10-31 22:00:35,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012774256] [2024-10-31 22:00:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:35,493 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 22:00:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012774256] [2024-10-31 22:00:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012774256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:35,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:35,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:35,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273157668] [2024-10-31 22:00:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:35,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:35,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:35,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:35,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 134 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 22:00:35,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:35,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:35,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:35,702 INFO L124 PetriNetUnfolderBase]: 383/654 cut-off events. [2024-10-31 22:00:35,702 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:00:35,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 654 events. 383/654 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3189 event pairs, 242 based on Foata normal form. 16/430 useless extension candidates. Maximal degree in co-relation 1140. Up to 552 conditions per place. [2024-10-31 22:00:35,707 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 43 selfloop transitions, 4 changer transitions 1/53 dead transitions. [2024-10-31 22:00:35,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 258 flow [2024-10-31 22:00:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-10-31 22:00:35,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-31 22:00:35,710 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 134 flow. Second operand 4 states and 99 transitions. [2024-10-31 22:00:35,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 258 flow [2024-10-31 22:00:35,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 233 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-10-31 22:00:35,713 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 130 flow [2024-10-31 22:00:35,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-10-31 22:00:35,715 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-31 22:00:35,716 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 130 flow [2024-10-31 22:00:35,717 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 22:00:35,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:35,717 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:35,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:00:35,718 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:35,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1166521821, now seen corresponding path program 1 times [2024-10-31 22:00:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:35,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665380427] [2024-10-31 22:00:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:35,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:35,843 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 22:00:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665380427] [2024-10-31 22:00:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665380427] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:35,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:35,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034308955] [2024-10-31 22:00:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:35,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:35,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:35,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 130 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 22:00:35,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:35,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:35,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:36,081 INFO L124 PetriNetUnfolderBase]: 417/764 cut-off events. [2024-10-31 22:00:36,081 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 22:00:36,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 764 events. 417/764 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4132 event pairs, 276 based on Foata normal form. 15/525 useless extension candidates. Maximal degree in co-relation 1312. Up to 607 conditions per place. [2024-10-31 22:00:36,087 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2024-10-31 22:00:36,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 59 transitions, 301 flow [2024-10-31 22:00:36,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-31 22:00:36,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-10-31 22:00:36,090 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 130 flow. Second operand 4 states and 102 transitions. [2024-10-31 22:00:36,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 59 transitions, 301 flow [2024-10-31 22:00:36,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:36,093 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 146 flow [2024-10-31 22:00:36,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-31 22:00:36,094 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-10-31 22:00:36,095 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 146 flow [2024-10-31 22:00:36,095 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 22:00:36,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:36,095 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:36,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:00:36,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:36,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1059233300, now seen corresponding path program 1 times [2024-10-31 22:00:36,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:36,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124006962] [2024-10-31 22:00:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,295 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 22:00:36,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124006962] [2024-10-31 22:00:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124006962] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:36,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554952819] [2024-10-31 22:00:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:36,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:36,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:00:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:00:36,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:36,496 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 22:00:36,496 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:00:36,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554952819] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:36,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:00:36,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-10-31 22:00:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497349768] [2024-10-31 22:00:36,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:36,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:00:36,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:36,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:36,669 INFO L124 PetriNetUnfolderBase]: 333/633 cut-off events. [2024-10-31 22:00:36,669 INFO L125 PetriNetUnfolderBase]: For 94/109 co-relation queries the response was YES. [2024-10-31 22:00:36,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 633 events. 333/633 cut-off events. For 94/109 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3310 event pairs, 222 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 1305. Up to 558 conditions per place. [2024-10-31 22:00:36,674 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-10-31 22:00:36,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 206 flow [2024-10-31 22:00:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-10-31 22:00:36,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-10-31 22:00:36,675 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 146 flow. Second operand 4 states and 78 transitions. [2024-10-31 22:00:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 206 flow [2024-10-31 22:00:36,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:36,678 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 141 flow [2024-10-31 22:00:36,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-10-31 22:00:36,679 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-10-31 22:00:36,679 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 141 flow [2024-10-31 22:00:36,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:36,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:36,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:36,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:00:36,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:36,881 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:36,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1059233301, now seen corresponding path program 1 times [2024-10-31 22:00:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:36,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764305082] [2024-10-31 22:00:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:36,959 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 22:00:36,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764305082] [2024-10-31 22:00:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764305082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:36,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570460305] [2024-10-31 22:00:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:36,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:36,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:36,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:36,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 22:00:36,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:36,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:36,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:37,098 INFO L124 PetriNetUnfolderBase]: 259/516 cut-off events. [2024-10-31 22:00:37,098 INFO L125 PetriNetUnfolderBase]: For 88/103 co-relation queries the response was YES. [2024-10-31 22:00:37,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1221 conditions, 516 events. 259/516 cut-off events. For 88/103 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2608 event pairs, 174 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 867. Up to 446 conditions per place. [2024-10-31 22:00:37,102 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-10-31 22:00:37,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 197 flow [2024-10-31 22:00:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-10-31 22:00:37,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-10-31 22:00:37,103 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 141 flow. Second operand 4 states and 68 transitions. [2024-10-31 22:00:37,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 197 flow [2024-10-31 22:00:37,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:37,105 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 133 flow [2024-10-31 22:00:37,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=133, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-10-31 22:00:37,108 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-10-31 22:00:37,108 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 133 flow [2024-10-31 22:00:37,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 22:00:37,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:37,109 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:37,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:00:37,109 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:37,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -793596425, now seen corresponding path program 1 times [2024-10-31 22:00:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406217634] [2024-10-31 22:00:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:37,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:00:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406217634] [2024-10-31 22:00:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406217634] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:37,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933232599] [2024-10-31 22:00:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:37,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:00:37,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:00:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:00:37,275 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:37,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 22:00:37,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:37,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:37,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:37,408 INFO L124 PetriNetUnfolderBase]: 195/414 cut-off events. [2024-10-31 22:00:37,408 INFO L125 PetriNetUnfolderBase]: For 80/88 co-relation queries the response was YES. [2024-10-31 22:00:37,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 414 events. 195/414 cut-off events. For 80/88 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2028 event pairs, 132 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 626. Up to 348 conditions per place. [2024-10-31 22:00:37,411 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-10-31 22:00:37,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 185 flow [2024-10-31 22:00:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:00:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:00:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-10-31 22:00:37,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-10-31 22:00:37,413 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 133 flow. Second operand 5 states and 76 transitions. [2024-10-31 22:00:37,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 185 flow [2024-10-31 22:00:37,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:37,416 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 131 flow [2024-10-31 22:00:37,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-10-31 22:00:37,417 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-10-31 22:00:37,417 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 131 flow [2024-10-31 22:00:37,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 22:00:37,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:37,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:37,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:00:37,421 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:37,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash -793596424, now seen corresponding path program 1 times [2024-10-31 22:00:37,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:37,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550992354] [2024-10-31 22:00:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:37,729 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 22:00:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550992354] [2024-10-31 22:00:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550992354] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:37,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:37,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:00:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376680210] [2024-10-31 22:00:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:37,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:00:37,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:37,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:00:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:00:37,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:00:37,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 22:00:37,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:37,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:00:37,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:37,883 INFO L124 PetriNetUnfolderBase]: 141/326 cut-off events. [2024-10-31 22:00:37,883 INFO L125 PetriNetUnfolderBase]: For 67/70 co-relation queries the response was YES. [2024-10-31 22:00:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 326 events. 141/326 cut-off events. For 67/70 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1535 event pairs, 96 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 425. Up to 274 conditions per place. [2024-10-31 22:00:37,885 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 25 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-10-31 22:00:37,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 179 flow [2024-10-31 22:00:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:00:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:00:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-10-31 22:00:37,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-31 22:00:37,887 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 131 flow. Second operand 4 states and 64 transitions. [2024-10-31 22:00:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 179 flow [2024-10-31 22:00:37,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 171 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:00:37,888 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 121 flow [2024-10-31 22:00:37,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-10-31 22:00:37,889 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-10-31 22:00:37,889 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 121 flow [2024-10-31 22:00:37,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 22:00:37,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:37,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:37,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:00:37,890 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:37,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash -130425818, now seen corresponding path program 1 times [2024-10-31 22:00:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:37,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445688038] [2024-10-31 22:00:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:37,989 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 22:00:37,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445688038] [2024-10-31 22:00:37,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445688038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:37,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:37,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920574181] [2024-10-31 22:00:37,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:37,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:37,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:37,999 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:37,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:38,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:38,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:38,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:38,100 INFO L124 PetriNetUnfolderBase]: 177/388 cut-off events. [2024-10-31 22:00:38,100 INFO L125 PetriNetUnfolderBase]: For 85/88 co-relation queries the response was YES. [2024-10-31 22:00:38,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 388 events. 177/388 cut-off events. For 85/88 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1851 event pairs, 61 based on Foata normal form. 4/383 useless extension candidates. Maximal degree in co-relation 694. Up to 181 conditions per place. [2024-10-31 22:00:38,103 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 33 selfloop transitions, 3 changer transitions 3/44 dead transitions. [2024-10-31 22:00:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 232 flow [2024-10-31 22:00:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-31 22:00:38,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-10-31 22:00:38,104 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 121 flow. Second operand 3 states and 70 transitions. [2024-10-31 22:00:38,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 232 flow [2024-10-31 22:00:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:00:38,107 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 124 flow [2024-10-31 22:00:38,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2024-10-31 22:00:38,110 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-31 22:00:38,110 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 124 flow [2024-10-31 22:00:38,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:38,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:38,110 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:38,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:00:38,111 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:38,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1774377738, now seen corresponding path program 1 times [2024-10-31 22:00:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542097464] [2024-10-31 22:00:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:38,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542097464] [2024-10-31 22:00:38,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542097464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:38,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:38,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:38,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278503378] [2024-10-31 22:00:38,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:38,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:38,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:38,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 22:00:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:38,275 INFO L124 PetriNetUnfolderBase]: 105/212 cut-off events. [2024-10-31 22:00:38,275 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-10-31 22:00:38,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 212 events. 105/212 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 736 event pairs, 22 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 508. Up to 143 conditions per place. [2024-10-31 22:00:38,277 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 31 selfloop transitions, 2 changer transitions 2/40 dead transitions. [2024-10-31 22:00:38,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 214 flow [2024-10-31 22:00:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-10-31 22:00:38,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-31 22:00:38,278 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 124 flow. Second operand 3 states and 66 transitions. [2024-10-31 22:00:38,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 214 flow [2024-10-31 22:00:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:38,280 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 135 flow [2024-10-31 22:00:38,281 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-10-31 22:00:38,281 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-31 22:00:38,281 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 135 flow [2024-10-31 22:00:38,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 22:00:38,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:38,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:38,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:00:38,283 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:38,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1404965208, now seen corresponding path program 1 times [2024-10-31 22:00:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:38,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238719458] [2024-10-31 22:00:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:00:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238719458] [2024-10-31 22:00:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238719458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:00:38,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:00:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:00:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267968193] [2024-10-31 22:00:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:00:38,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:00:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:00:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:00:38,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-31 22:00:38,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 22:00:38,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:38,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-31 22:00:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:00:38,432 INFO L124 PetriNetUnfolderBase]: 80/170 cut-off events. [2024-10-31 22:00:38,432 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-10-31 22:00:38,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 170 events. 80/170 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 486 event pairs, 28 based on Foata normal form. 5/170 useless extension candidates. Maximal degree in co-relation 425. Up to 112 conditions per place. [2024-10-31 22:00:38,433 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 32 selfloop transitions, 2 changer transitions 4/43 dead transitions. [2024-10-31 22:00:38,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 239 flow [2024-10-31 22:00:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:00:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:00:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-31 22:00:38,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-10-31 22:00:38,435 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 135 flow. Second operand 3 states and 68 transitions. [2024-10-31 22:00:38,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 239 flow [2024-10-31 22:00:38,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 232 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-31 22:00:38,437 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 145 flow [2024-10-31 22:00:38,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=145, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-10-31 22:00:38,438 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-10-31 22:00:38,438 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 145 flow [2024-10-31 22:00:38,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 22:00:38,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:00:38,438 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:00:38,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:00:38,439 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-31 22:00:38,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:00:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash 613160197, now seen corresponding path program 1 times [2024-10-31 22:00:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:00:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139495841] [2024-10-31 22:00:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:00:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:40,213 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 22:00:40,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:00:40,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139495841] [2024-10-31 22:00:40,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139495841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:00:40,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197060756] [2024-10-31 22:00:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:00:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:00:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:00:40,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:00:40,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b94caf4-f2b2-4ca7-922d-adf0480d6e76/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:00:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:00:40,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-31 22:00:40,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:00:40,347 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 6 treesize of output 5 [2024-10-31 22:00:40,460 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 22:00:40,550 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:00:40,550 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 11 treesize of output 11 [2024-10-31 22:00:40,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 22:00:41,787 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 22:00:41,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:00:44,689 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-10-31 22:00:44,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 413 treesize of output 395 [2024-10-31 22:00:44,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:00:44,765 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 350 treesize of output 340 [2024-10-31 22:00:45,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 91 treesize of output 79 [2024-10-31 22:00:45,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:00:45,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 448 treesize of output 418 [2024-10-31 22:00:50,260 INFO L349 Elim1Store]: treesize reduction 32, result has 63.2 percent of original size [2024-10-31 22:00:50,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 320 treesize of output 338 [2024-10-31 22:00:50,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:00:50,311 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 241 treesize of output 239 [2024-10-31 22:00:50,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 20 [2024-10-31 22:00:50,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:00:50,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 270 treesize of output 306 [2024-10-31 22:00:53,171 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 22:00:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197060756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:00:53,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:00:53,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-31 22:00:53,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813974180] [2024-10-31 22:00:53,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:00:53,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-31 22:00:53,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:00:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-31 22:00:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2024-10-31 22:00:54,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-31 22:00:54,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 145 flow. Second operand has 41 states, 41 states have (on average 9.682926829268293) internal successors, (397), 41 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:00:54,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:00:54,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-31 22:00:54,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand