./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya --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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:26:23,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:26:23,680 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:26:23,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:26:23,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:26:23,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:26:23,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:26:23,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:26:23,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:26:23,709 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:26:23,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:26:23,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:26:23,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:26:23,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:26:23,712 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:26:23,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:26:23,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:26:23,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:26:23,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:26:23,714 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:26:23,714 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:26:23,716 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:26:23,717 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:26:23,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:26:23,718 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:26:23,718 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:26:23,718 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:26:23,719 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:26:23,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:26:23,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:26:23,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:26:23,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:26:23,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:23,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:26:23,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:26:23,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:26:23,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:26:23,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:26:23,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:26:23,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:26:23,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:26:23,722 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_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2023-11-29 02:26:23,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:26:23,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:26:23,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:26:24,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:26:24,001 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:26:24,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2023-11-29 02:26:26,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:26:26,922 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:26:26,923 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2023-11-29 02:26:26,938 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/b349f84f5/f71db03c4a0244c6b082f8c19554360f/FLAGbc0b2a7d4 [2023-11-29 02:26:26,953 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/b349f84f5/f71db03c4a0244c6b082f8c19554360f [2023-11-29 02:26:26,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:26:26,957 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:26:26,958 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:26,958 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:26:26,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:26:26,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:26" (1/1) ... [2023-11-29 02:26:26,965 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1362f1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:26, skipping insertion in model container [2023-11-29 02:26:26,965 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:26" (1/1) ... [2023-11-29 02:26:27,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:26:27,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:27,335 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:26:27,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:27,421 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:26:27,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27 WrapperNode [2023-11-29 02:26:27,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:27,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:27,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:26:27,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:26:27,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,474 INFO L138 Inliner]: procedures = 169, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 146 [2023-11-29 02:26:27,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:27,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:26:27,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:26:27,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:26:27,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,492 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,509 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 2, 2, 3, 8]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 0, 0, 8]. The 4 writes are split as follows [0, 0, 1, 1, 2, 0]. [2023-11-29 02:26:27,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,510 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:26:27,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:26:27,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:26:27,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:26:27,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (1/1) ... [2023-11-29 02:26:27,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:27,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:27,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:26:27,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:26:27,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:26:27,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:26:27,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:26:27,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:26:27,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:26:27,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 02:26:27,644 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 02:26:27,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 02:26:27,645 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 02:26:27,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 02:26:27,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:26:27,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:26:27,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:26:27,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:26:27,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:26:27,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 02:26:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:26:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:26:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:26:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:26:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 02:26:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 02:26:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 02:26:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 02:26:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 02:26:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 02:26:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:26:27,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:26:27,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:26:27,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:26:27,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:26:27,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:26:27,650 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:26:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:26:27,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:26:27,653 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:26:27,811 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:26:27,813 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:26:28,102 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:26:28,243 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:26:28,244 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:26:28,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:28 BoogieIcfgContainer [2023-11-29 02:26:28,244 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:26:28,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:26:28,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:26:28,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:26:28,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:26:26" (1/3) ... [2023-11-29 02:26:28,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c71b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:28, skipping insertion in model container [2023-11-29 02:26:28,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:27" (2/3) ... [2023-11-29 02:26:28,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c71b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:28, skipping insertion in model container [2023-11-29 02:26:28,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:28" (3/3) ... [2023-11-29 02:26:28,253 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-11-29 02:26:28,273 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:26:28,274 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-29 02:26:28,274 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:26:28,335 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:26:28,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 156 flow [2023-11-29 02:26:28,411 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2023-11-29 02:26:28,411 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:26:28,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 10/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-29 02:26:28,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 71 transitions, 156 flow [2023-11-29 02:26:28,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 68 transitions, 148 flow [2023-11-29 02:26:28,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:26:28,437 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4ac09060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:26:28,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-29 02:26:28,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:26:28,442 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 02:26:28,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:26:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:28,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:26:28,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:28,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash 13091, now seen corresponding path program 1 times [2023-11-29 02:26:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128573313] [2023-11-29 02:26:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:28,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:28,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128573313] [2023-11-29 02:26:28,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128573313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:28,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:28,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:28,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887333442] [2023-11-29 02:26:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:28,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:28,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:28,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 71 [2023-11-29 02:26:28,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:28,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:28,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 71 [2023-11-29 02:26:28,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:29,169 INFO L124 PetriNetUnfolderBase]: 717/1376 cut-off events. [2023-11-29 02:26:29,170 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-29 02:26:29,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1376 events. 717/1376 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8047 event pairs, 548 based on Foata normal form. 138/1357 useless extension candidates. Maximal degree in co-relation 2408. Up to 1103 conditions per place. [2023-11-29 02:26:29,188 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-29 02:26:29,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 198 flow [2023-11-29 02:26:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:29,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:29,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:29,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,215 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 148 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 198 flow [2023-11-29 02:26:29,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:26:29,222 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 128 flow [2023-11-29 02:26:29,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-11-29 02:26:29,228 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-29 02:26:29,228 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 128 flow [2023-11-29 02:26:29,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:29,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:26:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:26:29,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:29,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 13092, now seen corresponding path program 1 times [2023-11-29 02:26:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252318767] [2023-11-29 02:26:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:29,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:29,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252318767] [2023-11-29 02:26:29,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252318767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318621448] [2023-11-29 02:26:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:29,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:29,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:29,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:29,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:29,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:29,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:29,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:29,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:29,585 INFO L124 PetriNetUnfolderBase]: 445/927 cut-off events. [2023-11-29 02:26:29,585 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 02:26:29,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1654 conditions, 927 events. 445/927 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5348 event pairs, 330 based on Foata normal form. 121/929 useless extension candidates. Maximal degree in co-relation 1644. Up to 710 conditions per place. [2023-11-29 02:26:29,594 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 29 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-29 02:26:29,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 186 flow [2023-11-29 02:26:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:29,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:29,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:29,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:29,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,602 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 128 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:29,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 186 flow [2023-11-29 02:26:29,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:29,606 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 124 flow [2023-11-29 02:26:29,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-29 02:26:29,607 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-11-29 02:26:29,607 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 124 flow [2023-11-29 02:26:29,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:29,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:26:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:26:29,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:29,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 390419630, now seen corresponding path program 1 times [2023-11-29 02:26:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:29,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522064578] [2023-11-29 02:26:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:29,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:29,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522064578] [2023-11-29 02:26:29,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522064578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:29,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:29,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933875781] [2023-11-29 02:26:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:29,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:29,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:29,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 71 [2023-11-29 02:26:29,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 71 [2023-11-29 02:26:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:29,860 INFO L124 PetriNetUnfolderBase]: 470/958 cut-off events. [2023-11-29 02:26:29,860 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 02:26:29,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 958 events. 470/958 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5505 event pairs, 350 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1722. Up to 757 conditions per place. [2023-11-29 02:26:29,868 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-29 02:26:29,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 186 flow [2023-11-29 02:26:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-29 02:26:29,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727699530516432 [2023-11-29 02:26:29,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-29 02:26:29,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-29 02:26:29,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:29,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-29 02:26:29,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,874 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 124 flow. Second operand 3 states and 122 transitions. [2023-11-29 02:26:29,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 186 flow [2023-11-29 02:26:29,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:29,876 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 120 flow [2023-11-29 02:26:29,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-11-29 02:26:29,877 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-29 02:26:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 120 flow [2023-11-29 02:26:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:29,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:26:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:26:29,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:29,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 390419631, now seen corresponding path program 1 times [2023-11-29 02:26:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:29,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568280573] [2023-11-29 02:26:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568280573] [2023-11-29 02:26:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568280573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:29,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:29,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885755536] [2023-11-29 02:26:29,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:29,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:29,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:29,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:29,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:29,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:30,134 INFO L124 PetriNetUnfolderBase]: 445/905 cut-off events. [2023-11-29 02:26:30,134 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 02:26:30,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 905 events. 445/905 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5104 event pairs, 330 based on Foata normal form. 21/829 useless extension candidates. Maximal degree in co-relation 1622. Up to 710 conditions per place. [2023-11-29 02:26:30,142 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 29 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-29 02:26:30,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 178 flow [2023-11-29 02:26:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:30,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:30,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:30,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:30,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:30,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:30,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,147 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 120 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:30,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 178 flow [2023-11-29 02:26:30,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:30,149 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 116 flow [2023-11-29 02:26:30,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-11-29 02:26:30,150 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2023-11-29 02:26:30,150 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 116 flow [2023-11-29 02:26:30,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:30,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:30,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:26:30,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:30,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash -873896646, now seen corresponding path program 1 times [2023-11-29 02:26:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:30,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311948856] [2023-11-29 02:26:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311948856] [2023-11-29 02:26:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311948856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:30,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:30,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462089814] [2023-11-29 02:26:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:30,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 71 [2023-11-29 02:26:30,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:30,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 71 [2023-11-29 02:26:30,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:30,545 INFO L124 PetriNetUnfolderBase]: 717/1284 cut-off events. [2023-11-29 02:26:30,545 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 02:26:30,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 1284 events. 717/1284 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6930 event pairs, 548 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 2394. Up to 1103 conditions per place. [2023-11-29 02:26:30,555 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-29 02:26:30,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 178 flow [2023-11-29 02:26:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-29 02:26:30,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727699530516432 [2023-11-29 02:26:30,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-29 02:26:30,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-29 02:26:30,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:30,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-29 02:26:30,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,560 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 116 flow. Second operand 3 states and 122 transitions. [2023-11-29 02:26:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 178 flow [2023-11-29 02:26:30,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:30,562 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 112 flow [2023-11-29 02:26:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-11-29 02:26:30,563 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-29 02:26:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 112 flow [2023-11-29 02:26:30,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:26:30,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:30,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash -873896645, now seen corresponding path program 1 times [2023-11-29 02:26:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614790078] [2023-11-29 02:26:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:30,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614790078] [2023-11-29 02:26:30,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614790078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:30,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:30,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:30,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207707955] [2023-11-29 02:26:30,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:30,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:30,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:30,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:30,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:30,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:30,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:30,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:31,111 INFO L124 PetriNetUnfolderBase]: 788/1545 cut-off events. [2023-11-29 02:26:31,111 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-29 02:26:31,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 1545 events. 788/1545 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 8602 event pairs, 263 based on Foata normal form. 0/1433 useless extension candidates. Maximal degree in co-relation 2770. Up to 698 conditions per place. [2023-11-29 02:26:31,123 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 55 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-29 02:26:31,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 281 flow [2023-11-29 02:26:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-29 02:26:31,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7276995305164319 [2023-11-29 02:26:31,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-29 02:26:31,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-29 02:26:31,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:31,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-29 02:26:31,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,128 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 112 flow. Second operand 3 states and 155 transitions. [2023-11-29 02:26:31,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 281 flow [2023-11-29 02:26:31,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:31,130 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 122 flow [2023-11-29 02:26:31,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-11-29 02:26:31,131 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-29 02:26:31,131 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 122 flow [2023-11-29 02:26:31,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:31,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:31,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:26:31,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:31,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1837254036, now seen corresponding path program 1 times [2023-11-29 02:26:31,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:31,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389237992] [2023-11-29 02:26:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:31,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221084554] [2023-11-29 02:26:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:31,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:31,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:31,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:26:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:31,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:26:31,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:31,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:31,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389237992] [2023-11-29 02:26:31,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221084554] [2023-11-29 02:26:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221084554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:31,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:31,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:26:31,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313357183] [2023-11-29 02:26:31,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:31,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:31,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:31,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:31,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:31,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:31,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:31,717 INFO L124 PetriNetUnfolderBase]: 831/1552 cut-off events. [2023-11-29 02:26:31,717 INFO L125 PetriNetUnfolderBase]: For 58/69 co-relation queries the response was YES. [2023-11-29 02:26:31,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1552 events. 831/1552 cut-off events. For 58/69 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8308 event pairs, 619 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 1270. Up to 1300 conditions per place. [2023-11-29 02:26:31,728 INFO L140 encePairwiseOnDemand]: 69/71 looper letters, 32 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-29 02:26:31,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 182 flow [2023-11-29 02:26:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:31,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:31,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:31,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:31,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:31,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:31,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,733 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 122 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:31,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 182 flow [2023-11-29 02:26:31,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:31,735 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 116 flow [2023-11-29 02:26:31,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-11-29 02:26:31,736 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -15 predicate places. [2023-11-29 02:26:31,736 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 116 flow [2023-11-29 02:26:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:31,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:31,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:31,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:31,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:31,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:31,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1240669931, now seen corresponding path program 1 times [2023-11-29 02:26:31,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:31,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423377918] [2023-11-29 02:26:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:31,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:32,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:32,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423377918] [2023-11-29 02:26:32,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423377918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:32,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:32,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175461507] [2023-11-29 02:26:32,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:32,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:32,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:32,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:32,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:32,322 INFO L124 PetriNetUnfolderBase]: 1002/1966 cut-off events. [2023-11-29 02:26:32,323 INFO L125 PetriNetUnfolderBase]: For 97/114 co-relation queries the response was YES. [2023-11-29 02:26:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3655 conditions, 1966 events. 1002/1966 cut-off events. For 97/114 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11050 event pairs, 358 based on Foata normal form. 26/1931 useless extension candidates. Maximal degree in co-relation 3647. Up to 1060 conditions per place. [2023-11-29 02:26:32,337 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 48 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-11-29 02:26:32,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 265 flow [2023-11-29 02:26:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2023-11-29 02:26:32,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6995305164319249 [2023-11-29 02:26:32,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2023-11-29 02:26:32,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2023-11-29 02:26:32,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:32,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2023-11-29 02:26:32,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,341 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 116 flow. Second operand 3 states and 149 transitions. [2023-11-29 02:26:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 265 flow [2023-11-29 02:26:32,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:32,343 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 130 flow [2023-11-29 02:26:32,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2023-11-29 02:26:32,344 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-29 02:26:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 130 flow [2023-11-29 02:26:32,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:32,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:32,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:26:32,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:32,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:32,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1144709562, now seen corresponding path program 1 times [2023-11-29 02:26:32,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:32,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299352526] [2023-11-29 02:26:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:32,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299352526] [2023-11-29 02:26:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299352526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:32,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:32,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:32,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208878938] [2023-11-29 02:26:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:32,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:32,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:32,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:32,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:32,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:32,734 INFO L124 PetriNetUnfolderBase]: 1325/2524 cut-off events. [2023-11-29 02:26:32,734 INFO L125 PetriNetUnfolderBase]: For 261/286 co-relation queries the response was YES. [2023-11-29 02:26:32,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 2524 events. 1325/2524 cut-off events. For 261/286 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 15478 event pairs, 810 based on Foata normal form. 12/2388 useless extension candidates. Maximal degree in co-relation 5018. Up to 1630 conditions per place. [2023-11-29 02:26:32,751 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 53 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-29 02:26:32,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 299 flow [2023-11-29 02:26:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-29 02:26:32,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2023-11-29 02:26:32,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-29 02:26:32,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-29 02:26:32,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:32,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-29 02:26:32,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,755 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 130 flow. Second operand 3 states and 153 transitions. [2023-11-29 02:26:32,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 299 flow [2023-11-29 02:26:32,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:32,759 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 139 flow [2023-11-29 02:26:32,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-11-29 02:26:32,760 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-11-29 02:26:32,760 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 139 flow [2023-11-29 02:26:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:32,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:32,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:26:32,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:32,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1205103271, now seen corresponding path program 1 times [2023-11-29 02:26:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:32,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903599052] [2023-11-29 02:26:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:32,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12933577] [2023-11-29 02:26:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:32,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:32,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:32,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:26:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:32,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:26:32,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:32,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:32,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903599052] [2023-11-29 02:26:32,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:32,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12933577] [2023-11-29 02:26:32,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12933577] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:32,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:26:32,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 02:26:32,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285706096] [2023-11-29 02:26:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:32,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:32,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:26:32,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:32,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:32,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:32,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:32,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:33,249 INFO L124 PetriNetUnfolderBase]: 1235/2409 cut-off events. [2023-11-29 02:26:33,249 INFO L125 PetriNetUnfolderBase]: For 279/285 co-relation queries the response was YES. [2023-11-29 02:26:33,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4961 conditions, 2409 events. 1235/2409 cut-off events. For 279/285 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 13935 event pairs, 372 based on Foata normal form. 0/2329 useless extension candidates. Maximal degree in co-relation 4950. Up to 1358 conditions per place. [2023-11-29 02:26:33,267 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 47 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-29 02:26:33,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 279 flow [2023-11-29 02:26:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-11-29 02:26:33,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676056338028169 [2023-11-29 02:26:33,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-11-29 02:26:33,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-11-29 02:26:33,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:33,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-11-29 02:26:33,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,270 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 139 flow. Second operand 3 states and 144 transitions. [2023-11-29 02:26:33,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 279 flow [2023-11-29 02:26:33,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:33,273 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 148 flow [2023-11-29 02:26:33,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-29 02:26:33,274 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2023-11-29 02:26:33,274 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 148 flow [2023-11-29 02:26:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:33,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:33,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:26:33,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:26:33,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:33,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -692313208, now seen corresponding path program 1 times [2023-11-29 02:26:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:33,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616642126] [2023-11-29 02:26:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:33,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:33,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:33,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907172077] [2023-11-29 02:26:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:33,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:33,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:33,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:33,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:26:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:33,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:26:33,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:33,677 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 11 treesize of output 7 [2023-11-29 02:26:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:33,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:33,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616642126] [2023-11-29 02:26:33,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907172077] [2023-11-29 02:26:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907172077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:33,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:33,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849447182] [2023-11-29 02:26:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:33,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:33,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:33,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:33,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:33,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:33,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:33,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:33,922 INFO L124 PetriNetUnfolderBase]: 762/1743 cut-off events. [2023-11-29 02:26:33,922 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2023-11-29 02:26:33,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3604 conditions, 1743 events. 762/1743 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10114 event pairs, 251 based on Foata normal form. 74/1793 useless extension candidates. Maximal degree in co-relation 3593. Up to 712 conditions per place. [2023-11-29 02:26:33,933 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 39 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-11-29 02:26:33,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 266 flow [2023-11-29 02:26:33,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-29 02:26:33,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619718309859155 [2023-11-29 02:26:33,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-29 02:26:33,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-29 02:26:33,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:33,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-29 02:26:33,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,937 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 148 flow. Second operand 3 states and 141 transitions. [2023-11-29 02:26:33,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 266 flow [2023-11-29 02:26:33,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:33,940 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 150 flow [2023-11-29 02:26:33,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-29 02:26:33,941 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2023-11-29 02:26:33,941 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 150 flow [2023-11-29 02:26:33,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:33,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:33,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:33,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:34,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:26:34,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:34,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:34,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1645311868, now seen corresponding path program 1 times [2023-11-29 02:26:34,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:34,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112754857] [2023-11-29 02:26:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:34,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112754857] [2023-11-29 02:26:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112754857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:34,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:34,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701413941] [2023-11-29 02:26:34,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:34,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:34,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:34,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:34,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:34,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:34,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:34,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:34,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:34,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:34,541 INFO L124 PetriNetUnfolderBase]: 1153/2547 cut-off events. [2023-11-29 02:26:34,541 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2023-11-29 02:26:34,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2547 events. 1153/2547 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 16452 event pairs, 529 based on Foata normal form. 49/2514 useless extension candidates. Maximal degree in co-relation 5629. Up to 1322 conditions per place. [2023-11-29 02:26:34,556 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-29 02:26:34,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 343 flow [2023-11-29 02:26:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 152 transitions. [2023-11-29 02:26:34,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7136150234741784 [2023-11-29 02:26:34,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 152 transitions. [2023-11-29 02:26:34,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 152 transitions. [2023-11-29 02:26:34,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:34,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 152 transitions. [2023-11-29 02:26:34,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:34,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:34,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:34,562 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 150 flow. Second operand 3 states and 152 transitions. [2023-11-29 02:26:34,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 343 flow [2023-11-29 02:26:34,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:34,565 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 158 flow [2023-11-29 02:26:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-11-29 02:26:34,566 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -7 predicate places. [2023-11-29 02:26:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 158 flow [2023-11-29 02:26:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:34,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:34,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:34,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:26:34,567 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:34,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash 500981853, now seen corresponding path program 1 times [2023-11-29 02:26:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:34,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754575581] [2023-11-29 02:26:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:34,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:34,586 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:34,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061634579] [2023-11-29 02:26:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:34,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:34,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:34,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:26:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:34,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:26:34,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:34,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:34,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:34,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-29 02:26:34,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:34,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-29 02:26:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:35,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:35,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:35,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754575581] [2023-11-29 02:26:35,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:35,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061634579] [2023-11-29 02:26:35,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061634579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:35,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:35,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546285403] [2023-11-29 02:26:35,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:35,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:35,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:35,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:35,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:35,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:35,725 INFO L124 PetriNetUnfolderBase]: 1791/3902 cut-off events. [2023-11-29 02:26:35,725 INFO L125 PetriNetUnfolderBase]: For 1433/1439 co-relation queries the response was YES. [2023-11-29 02:26:35,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8957 conditions, 3902 events. 1791/3902 cut-off events. For 1433/1439 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24720 event pairs, 1025 based on Foata normal form. 0/3794 useless extension candidates. Maximal degree in co-relation 8944. Up to 1927 conditions per place. [2023-11-29 02:26:35,750 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 80 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2023-11-29 02:26:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 483 flow [2023-11-29 02:26:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:26:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:26:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 207 transitions. [2023-11-29 02:26:35,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7288732394366197 [2023-11-29 02:26:35,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 207 transitions. [2023-11-29 02:26:35,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 207 transitions. [2023-11-29 02:26:35,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:35,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 207 transitions. [2023-11-29 02:26:35,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,754 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 158 flow. Second operand 4 states and 207 transitions. [2023-11-29 02:26:35,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 483 flow [2023-11-29 02:26:35,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 102 transitions, 480 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:35,759 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 176 flow [2023-11-29 02:26:35,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-29 02:26:35,759 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-11-29 02:26:35,760 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 176 flow [2023-11-29 02:26:35,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:35,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:35,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:35,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:26:35,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:26:35,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:35,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 903684307, now seen corresponding path program 1 times [2023-11-29 02:26:35,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412485804] [2023-11-29 02:26:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:36,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:36,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412485804] [2023-11-29 02:26:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412485804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756708341] [2023-11-29 02:26:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:36,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:36,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:36,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:36,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:36,506 INFO L124 PetriNetUnfolderBase]: 1348/2997 cut-off events. [2023-11-29 02:26:36,506 INFO L125 PetriNetUnfolderBase]: For 1085/1091 co-relation queries the response was YES. [2023-11-29 02:26:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6773 conditions, 2997 events. 1348/2997 cut-off events. For 1085/1091 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17824 event pairs, 579 based on Foata normal form. 14/2937 useless extension candidates. Maximal degree in co-relation 6758. Up to 1914 conditions per place. [2023-11-29 02:26:36,523 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 51 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-11-29 02:26:36,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 341 flow [2023-11-29 02:26:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2023-11-29 02:26:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6901408450704225 [2023-11-29 02:26:36,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 147 transitions. [2023-11-29 02:26:36,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 147 transitions. [2023-11-29 02:26:36,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:36,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 147 transitions. [2023-11-29 02:26:36,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.0) internal successors, (147), 3 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) [2023-11-29 02:26:36,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:36,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:36,527 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 176 flow. Second operand 3 states and 147 transitions. [2023-11-29 02:26:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 341 flow [2023-11-29 02:26:36,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 335 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 02:26:36,530 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 178 flow [2023-11-29 02:26:36,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-11-29 02:26:36,531 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-29 02:26:36,531 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 178 flow [2023-11-29 02:26:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:36,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:36,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:36,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 02:26:36,532 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:36,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2031812727, now seen corresponding path program 1 times [2023-11-29 02:26:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:36,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706317403] [2023-11-29 02:26:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:36,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:36,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578655232] [2023-11-29 02:26:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:36,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:36,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:26:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:36,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:26:36,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:37,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706317403] [2023-11-29 02:26:37,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578655232] [2023-11-29 02:26:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578655232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:37,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800969777] [2023-11-29 02:26:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:37,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:37,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:37,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:37,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:37,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:37,349 INFO L124 PetriNetUnfolderBase]: 1043/2361 cut-off events. [2023-11-29 02:26:37,349 INFO L125 PetriNetUnfolderBase]: For 854/858 co-relation queries the response was YES. [2023-11-29 02:26:37,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5351 conditions, 2361 events. 1043/2361 cut-off events. For 854/858 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 12878 event pairs, 380 based on Foata normal form. 18/2333 useless extension candidates. Maximal degree in co-relation 5333. Up to 1078 conditions per place. [2023-11-29 02:26:37,359 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 66 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-11-29 02:26:37,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 430 flow [2023-11-29 02:26:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:26:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:26:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2023-11-29 02:26:37,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6866197183098591 [2023-11-29 02:26:37,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 195 transitions. [2023-11-29 02:26:37,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 195 transitions. [2023-11-29 02:26:37,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:37,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 195 transitions. [2023-11-29 02:26:37,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:37,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:37,362 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:37,362 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 178 flow. Second operand 4 states and 195 transitions. [2023-11-29 02:26:37,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 430 flow [2023-11-29 02:26:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:37,365 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 184 flow [2023-11-29 02:26:37,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2023-11-29 02:26:37,366 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-11-29 02:26:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 184 flow [2023-11-29 02:26:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:37,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:37,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:37,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:26:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:26:37,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1402039230, now seen corresponding path program 1 times [2023-11-29 02:26:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097342681] [2023-11-29 02:26:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:37,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:37,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441778649] [2023-11-29 02:26:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:37,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:37,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:37,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:26:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:37,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:26:37,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:37,791 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 7 treesize of output 6 [2023-11-29 02:26:37,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 43 [2023-11-29 02:26:38,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2023-11-29 02:26:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:38,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097342681] [2023-11-29 02:26:38,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441778649] [2023-11-29 02:26:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441778649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:38,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:38,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 02:26:38,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582422230] [2023-11-29 02:26:38,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:38,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:26:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:26:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:26:38,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:40,732 INFO L124 PetriNetUnfolderBase]: 1511/3394 cut-off events. [2023-11-29 02:26:40,733 INFO L125 PetriNetUnfolderBase]: For 1339/1343 co-relation queries the response was YES. [2023-11-29 02:26:40,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7743 conditions, 3394 events. 1511/3394 cut-off events. For 1339/1343 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 20043 event pairs, 631 based on Foata normal form. 0/3334 useless extension candidates. Maximal degree in co-relation 7724. Up to 1136 conditions per place. [2023-11-29 02:26:40,757 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 120 selfloop transitions, 28 changer transitions 0/168 dead transitions. [2023-11-29 02:26:40,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 168 transitions, 872 flow [2023-11-29 02:26:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:26:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 02:26:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 576 transitions. [2023-11-29 02:26:40,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240520043336945 [2023-11-29 02:26:40,761 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 576 transitions. [2023-11-29 02:26:40,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 576 transitions. [2023-11-29 02:26:40,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:40,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 576 transitions. [2023-11-29 02:26:40,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 44.30769230769231) internal successors, (576), 13 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 71.0) internal successors, (994), 14 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,767 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 71.0) internal successors, (994), 14 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,768 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 184 flow. Second operand 13 states and 576 transitions. [2023-11-29 02:26:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 168 transitions, 872 flow [2023-11-29 02:26:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 168 transitions, 859 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:26:40,776 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 386 flow [2023-11-29 02:26:40,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=386, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2023-11-29 02:26:40,776 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-11-29 02:26:40,777 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 386 flow [2023-11-29 02:26:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.888888888888886) internal successors, (314), 9 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:40,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:40,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:40,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:26:40,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:26:40,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:40,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash 330297936, now seen corresponding path program 1 times [2023-11-29 02:26:40,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:40,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334152015] [2023-11-29 02:26:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:40,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334152015] [2023-11-29 02:26:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334152015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:26:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23353455] [2023-11-29 02:26:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:41,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:41,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:41,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:26:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:41,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:26:41,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:41,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:26:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23353455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:26:41,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:26:41,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 02:26:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506216221] [2023-11-29 02:26:41,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:26:41,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:26:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:26:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:26:41,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:42,104 INFO L124 PetriNetUnfolderBase]: 3662/7498 cut-off events. [2023-11-29 02:26:42,105 INFO L125 PetriNetUnfolderBase]: For 4848/4848 co-relation queries the response was YES. [2023-11-29 02:26:42,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19175 conditions, 7498 events. 3662/7498 cut-off events. For 4848/4848 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 50399 event pairs, 601 based on Foata normal form. 444/7826 useless extension candidates. Maximal degree in co-relation 19148. Up to 2079 conditions per place. [2023-11-29 02:26:42,145 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 157 selfloop transitions, 10 changer transitions 0/186 dead transitions. [2023-11-29 02:26:42,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 186 transitions, 1238 flow [2023-11-29 02:26:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:26:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 02:26:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 313 transitions. [2023-11-29 02:26:42,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7347417840375586 [2023-11-29 02:26:42,147 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 313 transitions. [2023-11-29 02:26:42,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 313 transitions. [2023-11-29 02:26:42,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:42,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 313 transitions. [2023-11-29 02:26:42,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.166666666666664) internal successors, (313), 6 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 71.0) internal successors, (497), 7 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 71.0) internal successors, (497), 7 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,149 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 386 flow. Second operand 6 states and 313 transitions. [2023-11-29 02:26:42,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 186 transitions, 1238 flow [2023-11-29 02:26:42,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 186 transitions, 1211 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:42,171 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 423 flow [2023-11-29 02:26:42,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2023-11-29 02:26:42,172 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 26 predicate places. [2023-11-29 02:26:42,172 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 423 flow [2023-11-29 02:26:42,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:42,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:42,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:26:42,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:26:42,373 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:42,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1415636188, now seen corresponding path program 1 times [2023-11-29 02:26:42,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:42,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656089643] [2023-11-29 02:26:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:42,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:42,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317668299] [2023-11-29 02:26:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:42,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:42,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:42,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:42,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:26:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:42,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:26:42,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:42,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:26:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656089643] [2023-11-29 02:26:42,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:26:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317668299] [2023-11-29 02:26:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317668299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:42,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:42,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189885020] [2023-11-29 02:26:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:26:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:42,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:43,447 INFO L124 PetriNetUnfolderBase]: 3660/8077 cut-off events. [2023-11-29 02:26:43,447 INFO L125 PetriNetUnfolderBase]: For 8628/8638 co-relation queries the response was YES. [2023-11-29 02:26:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22987 conditions, 8077 events. 3660/8077 cut-off events. For 8628/8638 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 57947 event pairs, 1915 based on Foata normal form. 71/8049 useless extension candidates. Maximal degree in co-relation 22956. Up to 3838 conditions per place. [2023-11-29 02:26:43,500 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 80 selfloop transitions, 6 changer transitions 0/106 dead transitions. [2023-11-29 02:26:43,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 106 transitions, 729 flow [2023-11-29 02:26:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-29 02:26:43,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6713615023474179 [2023-11-29 02:26:43,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-29 02:26:43,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-29 02:26:43,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:43,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-29 02:26:43,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,504 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 423 flow. Second operand 3 states and 143 transitions. [2023-11-29 02:26:43,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 106 transitions, 729 flow [2023-11-29 02:26:43,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 106 transitions, 708 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:43,548 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 441 flow [2023-11-29 02:26:43,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=441, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2023-11-29 02:26:43,548 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 29 predicate places. [2023-11-29 02:26:43,549 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 441 flow [2023-11-29 02:26:43,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:43,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:43,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:43,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:26:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:26:43,753 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:43,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 772574526, now seen corresponding path program 2 times [2023-11-29 02:26:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:26:43,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006067804] [2023-11-29 02:26:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:43,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:26:43,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:26:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867719517] [2023-11-29 02:26:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:26:43,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:43,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:26:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:26:44,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:26:44,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-29 02:26:44,262 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:26:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:26:44,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 02:26:44,348 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:26:44,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-11-29 02:26:44,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-11-29 02:26:44,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-11-29 02:26:44,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-11-29 02:26:44,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-11-29 02:26:44,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:44,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:26:44,554 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:44,558 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 02:26:44,558 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 02:26:44,595 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-29 02:26:44,597 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated [2023-11-29 02:26:44,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 02:26:44 BasicIcfg [2023-11-29 02:26:44,610 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 02:26:44,610 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 02:26:44,610 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 02:26:44,610 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 02:26:44,611 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:28" (3/4) ... [2023-11-29 02:26:44,612 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 02:26:44,613 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 02:26:44,613 INFO L158 Benchmark]: Toolchain (without parser) took 17656.80ms. Allocated memory was 176.2MB in the beginning and 390.1MB in the end (delta: 213.9MB). Free memory was 136.4MB in the beginning and 200.5MB in the end (delta: -64.1MB). Peak memory consumption was 149.6MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,613 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:26:44,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.99ms. Allocated memory is still 176.2MB. Free memory was 136.4MB in the beginning and 116.2MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.05ms. Allocated memory is still 176.2MB. Free memory was 116.2MB in the beginning and 113.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,614 INFO L158 Benchmark]: Boogie Preprocessor took 57.77ms. Allocated memory is still 176.2MB. Free memory was 113.3MB in the beginning and 110.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,614 INFO L158 Benchmark]: RCFGBuilder took 710.58ms. Allocated memory is still 176.2MB. Free memory was 110.4MB in the beginning and 105.4MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,614 INFO L158 Benchmark]: TraceAbstraction took 16363.25ms. Allocated memory was 176.2MB in the beginning and 390.1MB in the end (delta: 213.9MB). Free memory was 104.6MB in the beginning and 201.5MB in the end (delta: -96.9MB). Peak memory consumption was 117.6MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,615 INFO L158 Benchmark]: Witness Printer took 2.58ms. Allocated memory is still 390.1MB. Free memory was 201.5MB in the beginning and 200.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:26:44,616 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory is still 90.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 463.99ms. Allocated memory is still 176.2MB. Free memory was 136.4MB in the beginning and 116.2MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.05ms. Allocated memory is still 176.2MB. Free memory was 116.2MB in the beginning and 113.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.77ms. Allocated memory is still 176.2MB. Free memory was 113.3MB in the beginning and 110.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 710.58ms. Allocated memory is still 176.2MB. Free memory was 110.4MB in the beginning and 105.4MB in the end (delta: 5.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 16363.25ms. Allocated memory was 176.2MB in the beginning and 390.1MB in the end (delta: 213.9MB). Free memory was 104.6MB in the beginning and 201.5MB in the end (delta: -96.9MB). Peak memory consumption was 117.6MB. Max. memory is 16.1GB. * Witness Printer took 2.58ms. Allocated memory is still 390.1MB. Free memory was 201.5MB in the beginning and 200.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 681]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 681. Possible FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={6:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] CALL 2 reach_error() [L681] COND FALSE 2 !(0) VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] [L681] 2 __assert_fail ("0", "", 0, __extension__ __PRETTY_FUNCTION__) VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 681]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.2s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 988 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 782 mSDsluCounter, 57 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1828 IncrementalHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 19 mSDtfsCounter, 1828 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=441occurred in iteration=18, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 376 ConstructedInterpolants, 13 QuantifiedInterpolants, 2452 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1787 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 21 InterpolantComputations, 17 PerfectInterpolantSequences, 16/23 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-29 02:26:44,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya --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 a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:26:46,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:26:46,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 02:26:46,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:26:46,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:26:46,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:26:46,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:26:46,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:26:46,671 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:26:46,672 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:26:46,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:26:46,673 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:26:46,674 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:26:46,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:26:46,675 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:26:46,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:26:46,677 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:26:46,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:26:46,678 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:26:46,678 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:26:46,679 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:26:46,680 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:26:46,680 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:26:46,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:26:46,681 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:26:46,682 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 02:26:46,682 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 02:26:46,682 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:26:46,683 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:26:46,683 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:26:46,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:26:46,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:26:46,684 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:26:46,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:26:46,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:46,685 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:26:46,685 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:26:46,686 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 02:26:46,686 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 02:26:46,686 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:26:46,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:26:46,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:26:46,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:26:46,687 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 02:26:46,687 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_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5ee9b9286f55973fff2cea9c449f3602c5be2a48fed2e7e6cce6beebc18d9bc [2023-11-29 02:26:46,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:26:46,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:26:46,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:26:46,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:26:46,989 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:26:46,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2023-11-29 02:26:49,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:26:49,944 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:26:49,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/sv-benchmarks/c/pthread-deagle/circular_buffer_bad.i [2023-11-29 02:26:49,961 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/381e7e485/56672fee8b0d42b998d12cd2e9fade6c/FLAGfbfc83307 [2023-11-29 02:26:49,973 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/data/381e7e485/56672fee8b0d42b998d12cd2e9fade6c [2023-11-29 02:26:49,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:26:49,977 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:26:49,978 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:49,978 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:26:49,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:26:49,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:49" (1/1) ... [2023-11-29 02:26:49,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da200d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:49, skipping insertion in model container [2023-11-29 02:26:49,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:26:49" (1/1) ... [2023-11-29 02:26:50,030 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:26:50,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:50,388 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:26:50,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:26:50,475 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:26:50,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50 WrapperNode [2023-11-29 02:26:50,476 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:26:50,477 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:50,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:26:50,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:26:50,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,528 INFO L138 Inliner]: procedures = 176, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 145 [2023-11-29 02:26:50,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:26:50,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:26:50,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:26:50,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:26:50,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,545 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,564 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 2, 3, 8, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 0, 8, 0]. The 4 writes are split as follows [0, 0, 1, 2, 0, 1]. [2023-11-29 02:26:50,564 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,564 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:26:50,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:26:50,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:26:50,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:26:50,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (1/1) ... [2023-11-29 02:26:50,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:26:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:26:50,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:26:50,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:26:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2023-11-29 02:26:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2023-11-29 02:26:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2023-11-29 02:26:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#3 [2023-11-29 02:26:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#4 [2023-11-29 02:26:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#5 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 02:26:50,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2023-11-29 02:26:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 02:26:50,679 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 02:26:50,679 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 02:26:50,679 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2023-11-29 02:26:50,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#3 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#4 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#5 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 02:26:50,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#5 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2023-11-29 02:26:50,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#0 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#1 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#2 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#3 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#4 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2#5 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 02:26:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2023-11-29 02:26:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2023-11-29 02:26:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2023-11-29 02:26:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2023-11-29 02:26:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2023-11-29 02:26:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#5 [2023-11-29 02:26:50,685 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 02:26:50,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:26:50,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:26:50,687 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:26:50,883 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:26:50,885 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:26:51,289 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:26:51,504 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:26:51,504 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:26:51,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:51 BoogieIcfgContainer [2023-11-29 02:26:51,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:26:51,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:26:51,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:26:51,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:26:51,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:26:49" (1/3) ... [2023-11-29 02:26:51,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fcf73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:51, skipping insertion in model container [2023-11-29 02:26:51,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:26:50" (2/3) ... [2023-11-29 02:26:51,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fcf73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:26:51, skipping insertion in model container [2023-11-29 02:26:51,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:51" (3/3) ... [2023-11-29 02:26:51,515 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-11-29 02:26:51,534 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:26:51,534 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-29 02:26:51,534 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:26:51,592 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 02:26:51,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 156 flow [2023-11-29 02:26:51,671 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2023-11-29 02:26:51,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 02:26:51,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 10/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 188 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-11-29 02:26:51,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 71 transitions, 156 flow [2023-11-29 02:26:51,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 68 transitions, 148 flow [2023-11-29 02:26:51,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:26:51,699 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@4f7375a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:26:51,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-29 02:26:51,703 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:26:51,703 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 02:26:51,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:26:51,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:51,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:26:51,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:51,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash 13091, now seen corresponding path program 1 times [2023-11-29 02:26:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:51,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659466421] [2023-11-29 02:26:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:51,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:51,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:51,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 02:26:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:51,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:26:51,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:52,001 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 02:26:52,002 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-29 02:26:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:52,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:52,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:52,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659466421] [2023-11-29 02:26:52,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659466421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:52,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:52,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920943943] [2023-11-29 02:26:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:52,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 71 [2023-11-29 02:26:52,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 68 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:52,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 71 [2023-11-29 02:26:52,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:52,577 INFO L124 PetriNetUnfolderBase]: 716/1372 cut-off events. [2023-11-29 02:26:52,577 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-29 02:26:52,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1372 events. 716/1372 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8058 event pairs, 545 based on Foata normal form. 132/1350 useless extension candidates. Maximal degree in co-relation 2397. Up to 1098 conditions per place. [2023-11-29 02:26:52,593 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-29 02:26:52,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 198 flow [2023-11-29 02:26:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:52,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:52,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:52,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:52,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:52,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:52,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,617 INFO L175 Difference]: Start difference. First operand has 65 places, 68 transitions, 148 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:52,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 198 flow [2023-11-29 02:26:52,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 02:26:52,624 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 128 flow [2023-11-29 02:26:52,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-11-29 02:26:52,630 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-29 02:26:52,630 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 128 flow [2023-11-29 02:26:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:52,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:52,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:26:52,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:52,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:52,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:52,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 13092, now seen corresponding path program 1 times [2023-11-29 02:26:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283287375] [2023-11-29 02:26:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:52,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:52,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 02:26:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:52,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:26:52,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:52,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-29 02:26:52,981 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 10 treesize of output 8 [2023-11-29 02:26:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:52,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:52,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:52,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283287375] [2023-11-29 02:26:52,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283287375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:52,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:52,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:52,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460029555] [2023-11-29 02:26:52,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:53,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:53,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:53,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:53,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:53,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:53,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:53,311 INFO L124 PetriNetUnfolderBase]: 444/923 cut-off events. [2023-11-29 02:26:53,312 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 02:26:53,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 923 events. 444/923 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5315 event pairs, 327 based on Foata normal form. 121/929 useless extension candidates. Maximal degree in co-relation 1634. Up to 705 conditions per place. [2023-11-29 02:26:53,320 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 29 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-11-29 02:26:53,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 186 flow [2023-11-29 02:26:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:53,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:53,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:53,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:53,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:53,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:53,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,326 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 128 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:53,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 186 flow [2023-11-29 02:26:53,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:53,329 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 124 flow [2023-11-29 02:26:53,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-29 02:26:53,330 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-11-29 02:26:53,331 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 124 flow [2023-11-29 02:26:53,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:53,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:26:53,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 02:26:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:53,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:53,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 390419568, now seen corresponding path program 1 times [2023-11-29 02:26:53,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:53,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594846539] [2023-11-29 02:26:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:53,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:53,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:53,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 02:26:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:53,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:26:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:53,667 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 7 [2023-11-29 02:26:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:53,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:53,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:53,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:53,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594846539] [2023-11-29 02:26:53,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594846539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:53,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:53,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512920535] [2023-11-29 02:26:53,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:53,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:53,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 71 [2023-11-29 02:26:53,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:53,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 71 [2023-11-29 02:26:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:53,973 INFO L124 PetriNetUnfolderBase]: 470/959 cut-off events. [2023-11-29 02:26:53,973 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 02:26:53,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 959 events. 470/959 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5487 event pairs, 349 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1721. Up to 755 conditions per place. [2023-11-29 02:26:53,981 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 31 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-29 02:26:53,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 186 flow [2023-11-29 02:26:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-29 02:26:53,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727699530516432 [2023-11-29 02:26:53,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-29 02:26:53,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-29 02:26:53,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:53,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-29 02:26:53,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,986 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 124 flow. Second operand 3 states and 122 transitions. [2023-11-29 02:26:53,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 186 flow [2023-11-29 02:26:53,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:53,989 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 120 flow [2023-11-29 02:26:53,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-11-29 02:26:53,990 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-11-29 02:26:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 120 flow [2023-11-29 02:26:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:53,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:26:53,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 02:26:54,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:54,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:54,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash 390419569, now seen corresponding path program 1 times [2023-11-29 02:26:54,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:54,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880419410] [2023-11-29 02:26:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:54,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:54,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:54,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:54,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 02:26:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:54,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:26:54,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:54,321 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 [2023-11-29 02:26:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:54,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 02:26:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:54,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:54,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880419410] [2023-11-29 02:26:54,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880419410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:54,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:54,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137197680] [2023-11-29 02:26:54,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:54,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:54,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:54,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:54,674 INFO L124 PetriNetUnfolderBase]: 444/911 cut-off events. [2023-11-29 02:26:54,674 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 02:26:54,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 911 events. 444/911 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5191 event pairs, 327 based on Foata normal form. 20/828 useless extension candidates. Maximal degree in co-relation 1622. Up to 705 conditions per place. [2023-11-29 02:26:54,682 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 29 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-11-29 02:26:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 178 flow [2023-11-29 02:26:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:54,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:54,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:54,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:54,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:54,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:54,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,686 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 120 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:54,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 178 flow [2023-11-29 02:26:54,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:54,689 INFO L231 Difference]: Finished difference. Result has 53 places, 54 transitions, 116 flow [2023-11-29 02:26:54,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=54} [2023-11-29 02:26:54,690 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2023-11-29 02:26:54,690 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 54 transitions, 116 flow [2023-11-29 02:26:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:54,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:54,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:54,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:26:54,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:54,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:54,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1586896376, now seen corresponding path program 1 times [2023-11-29 02:26:54,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:54,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394746815] [2023-11-29 02:26:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:54,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:54,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:54,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 02:26:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:55,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:26:55,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:55,064 INFO L349 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2023-11-29 02:26:55,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 27 [2023-11-29 02:26:55,105 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-29 02:26:55,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-29 02:26:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:55,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:55,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:55,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394746815] [2023-11-29 02:26:55,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394746815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:55,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:55,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:55,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96392184] [2023-11-29 02:26:55,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:55,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:55,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:55,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 71 [2023-11-29 02:26:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 71 [2023-11-29 02:26:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:55,746 INFO L124 PetriNetUnfolderBase]: 444/887 cut-off events. [2023-11-29 02:26:55,747 INFO L125 PetriNetUnfolderBase]: For 13/14 co-relation queries the response was YES. [2023-11-29 02:26:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 887 events. 444/887 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4884 event pairs, 327 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 1598. Up to 705 conditions per place. [2023-11-29 02:26:55,753 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 29 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-11-29 02:26:55,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 174 flow [2023-11-29 02:26:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-11-29 02:26:55,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5915492957746479 [2023-11-29 02:26:55,755 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-11-29 02:26:55,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-11-29 02:26:55,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:55,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-11-29 02:26:55,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,757 INFO L175 Difference]: Start difference. First operand has 53 places, 54 transitions, 116 flow. Second operand 3 states and 126 transitions. [2023-11-29 02:26:55,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 174 flow [2023-11-29 02:26:55,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:55,759 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 112 flow [2023-11-29 02:26:55,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-11-29 02:26:55,760 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -14 predicate places. [2023-11-29 02:26:55,761 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 112 flow [2023-11-29 02:26:55,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:55,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:55,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:55,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 02:26:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:55,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1586896377, now seen corresponding path program 1 times [2023-11-29 02:26:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488582594] [2023-11-29 02:26:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:55,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:55,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 02:26:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:56,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:26:56,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:56,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-11-29 02:26:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:56,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 02:26:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:26:56,148 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-29 02:26:56,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2023-11-29 02:26:56,168 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-29 02:26:56,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-29 02:26:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:56,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:56,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488582594] [2023-11-29 02:26:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488582594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:56,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:56,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:26:56,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990767382] [2023-11-29 02:26:56,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:56,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:56,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:56,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:56,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:56,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:56,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:57,144 INFO L124 PetriNetUnfolderBase]: 785/1544 cut-off events. [2023-11-29 02:26:57,145 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-11-29 02:26:57,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 1544 events. 785/1544 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8577 event pairs, 260 based on Foata normal form. 0/1428 useless extension candidates. Maximal degree in co-relation 2763. Up to 698 conditions per place. [2023-11-29 02:26:57,155 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 55 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-29 02:26:57,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 281 flow [2023-11-29 02:26:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-29 02:26:57,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7276995305164319 [2023-11-29 02:26:57,157 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-29 02:26:57,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-29 02:26:57,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:57,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-29 02:26:57,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:57,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:57,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:57,159 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 112 flow. Second operand 3 states and 155 transitions. [2023-11-29 02:26:57,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 281 flow [2023-11-29 02:26:57,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:57,162 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 122 flow [2023-11-29 02:26:57,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-11-29 02:26:57,163 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -13 predicate places. [2023-11-29 02:26:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 122 flow [2023-11-29 02:26:57,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:57,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:57,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:57,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 02:26:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:57,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:57,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash 525395028, now seen corresponding path program 1 times [2023-11-29 02:26:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131298677] [2023-11-29 02:26:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:57,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:57,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:57,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 02:26:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:57,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:26:57,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:57,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:57,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:57,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131298677] [2023-11-29 02:26:57,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131298677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:57,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:57,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:57,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546873473] [2023-11-29 02:26:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:57,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:26:57,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:57,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:26:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:26:57,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:57,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:57,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:57,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:57,985 INFO L124 PetriNetUnfolderBase]: 986/2069 cut-off events. [2023-11-29 02:26:57,985 INFO L125 PetriNetUnfolderBase]: For 120/121 co-relation queries the response was YES. [2023-11-29 02:26:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3788 conditions, 2069 events. 986/2069 cut-off events. For 120/121 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 11922 event pairs, 195 based on Foata normal form. 75/2068 useless extension candidates. Maximal degree in co-relation 1387. Up to 627 conditions per place. [2023-11-29 02:26:57,998 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 77 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-11-29 02:26:57,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 101 transitions, 388 flow [2023-11-29 02:26:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:26:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:26:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2023-11-29 02:26:58,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7570422535211268 [2023-11-29 02:26:58,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 215 transitions. [2023-11-29 02:26:58,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 215 transitions. [2023-11-29 02:26:58,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:58,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 215 transitions. [2023-11-29 02:26:58,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,003 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 122 flow. Second operand 4 states and 215 transitions. [2023-11-29 02:26:58,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 101 transitions, 388 flow [2023-11-29 02:26:58,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:26:58,006 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 142 flow [2023-11-29 02:26:58,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-11-29 02:26:58,007 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2023-11-29 02:26:58,007 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 142 flow [2023-11-29 02:26:58,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:58,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:58,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 02:26:58,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:58,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:58,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash -886512219, now seen corresponding path program 1 times [2023-11-29 02:26:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:58,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976215443] [2023-11-29 02:26:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:58,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:58,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:58,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 02:26:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:58,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:26:58,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:58,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:58,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976215443] [2023-11-29 02:26:58,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976215443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:58,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:58,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:26:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362643640] [2023-11-29 02:26:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:58,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:58,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:58,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:58,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:58,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:58,718 INFO L124 PetriNetUnfolderBase]: 1115/2291 cut-off events. [2023-11-29 02:26:58,719 INFO L125 PetriNetUnfolderBase]: For 455/488 co-relation queries the response was YES. [2023-11-29 02:26:58,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 2291 events. 1115/2291 cut-off events. For 455/488 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13563 event pairs, 484 based on Foata normal form. 0/2189 useless extension candidates. Maximal degree in co-relation 3478. Up to 1067 conditions per place. [2023-11-29 02:26:58,735 INFO L140 encePairwiseOnDemand]: 66/71 looper letters, 52 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-29 02:26:58,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 316 flow [2023-11-29 02:26:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-29 02:26:58,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704225352112676 [2023-11-29 02:26:58,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-29 02:26:58,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-29 02:26:58,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:58,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-29 02:26:58,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,738 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 142 flow. Second operand 3 states and 150 transitions. [2023-11-29 02:26:58,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 316 flow [2023-11-29 02:26:58,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:58,742 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 164 flow [2023-11-29 02:26:58,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2023-11-29 02:26:58,743 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -7 predicate places. [2023-11-29 02:26:58,743 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 164 flow [2023-11-29 02:26:58,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:58,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:58,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:58,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 02:26:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:58,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:58,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash 332236566, now seen corresponding path program 1 times [2023-11-29 02:26:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:58,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100708424] [2023-11-29 02:26:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:58,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:58,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:58,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 02:26:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:59,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:26:59,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:59,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:59,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100708424] [2023-11-29 02:26:59,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100708424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:59,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:59,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:59,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314315686] [2023-11-29 02:26:59,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:59,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:26:59,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:59,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:26:59,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:26:59,411 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([426] insertLogElement_returnLabel#1-->L727-2: Formula: (and (= v_~send~0_17 (_ bv0 8)) (= (_ bv1 8) v_~receive~0_7)) InVars {} OutVars{t1Thread1of1ForFork1_#t~ret5#1=|v_t1Thread1of1ForFork1_#t~ret5#1_1|, t1Thread1of1ForFork1_insertLogElement_#in~b#1=|v_t1Thread1of1ForFork1_insertLogElement_#in~b#1_3|, ~receive~0=v_~receive~0_7, ~send~0=v_~send~0_17, t1Thread1of1ForFork1_insertLogElement_~b#1=|v_t1Thread1of1ForFork1_insertLogElement_~b#1_5|} AuxVars[] AssignedVars[t1Thread1of1ForFork1_insertLogElement_#in~b#1, ~receive~0, t1Thread1of1ForFork1_insertLogElement_~b#1, t1Thread1of1ForFork1_#t~ret5#1, ~send~0][46], [Black: 228#(= ~receive~0 (_ bv0 8)), Black: 153#(and (or (= (_ bv4 32) (select |#length| (_ bv3 32))) (and (exists ((|ULTIMATE.start_main_~#id1~0#1.base| (_ BitVec 32))) (= (_ bv4 32) (select |#length| |ULTIMATE.start_main_~#id1~0#1.base|))) (= (_ bv10 32) (select |#length| (_ bv3 32)))) (and (exists ((|ULTIMATE.start_main_~#id2~0#1.base| (_ BitVec 32))) (= (_ bv4 32) (select |#length| |ULTIMATE.start_main_~#id2~0#1.base|))) (= (_ bv10 32) (select |#length| (_ bv3 32))))) (= |~#buffer~0.offset| (_ bv0 32)) (= (_ bv3 32) |~#buffer~0.base|) (= (_ bv0 32) ~next~0)), 37#L727-2true, 20#L743-2true, 3#L763true, 274#true, 223#true, Black: 185#(and (= (_ bv0 32) ~next~0) (= (_ bv10 32) ~buffer_size~0)), Black: 213#(and (= (_ bv1 32) ~next~0) (= (_ bv10 32) ~buffer_size~0))]) [2023-11-29 02:26:59,411 INFO L294 olderBase$Statistics]: this new event has 45 ancestors and is cut-off event [2023-11-29 02:26:59,411 INFO L297 olderBase$Statistics]: existing Event has 37 ancestors and is cut-off event [2023-11-29 02:26:59,411 INFO L297 olderBase$Statistics]: existing Event has 41 ancestors and is cut-off event [2023-11-29 02:26:59,411 INFO L297 olderBase$Statistics]: existing Event has 33 ancestors and is cut-off event [2023-11-29 02:26:59,412 INFO L124 PetriNetUnfolderBase]: 1308/2665 cut-off events. [2023-11-29 02:26:59,412 INFO L125 PetriNetUnfolderBase]: For 679/713 co-relation queries the response was YES. [2023-11-29 02:26:59,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5470 conditions, 2665 events. 1308/2665 cut-off events. For 679/713 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 16748 event pairs, 889 based on Foata normal form. 12/2549 useless extension candidates. Maximal degree in co-relation 3848. Up to 1762 conditions per place. [2023-11-29 02:26:59,427 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 54 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-11-29 02:26:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 338 flow [2023-11-29 02:26:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:26:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:26:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2023-11-29 02:26:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7183098591549296 [2023-11-29 02:26:59,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 153 transitions. [2023-11-29 02:26:59,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 153 transitions. [2023-11-29 02:26:59,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:26:59,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 153 transitions. [2023-11-29 02:26:59,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,430 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 164 flow. Second operand 3 states and 153 transitions. [2023-11-29 02:26:59,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 338 flow [2023-11-29 02:26:59,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:26:59,435 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 168 flow [2023-11-29 02:26:59,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-29 02:26:59,436 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-11-29 02:26:59,436 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 168 flow [2023-11-29 02:26:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:26:59,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:26:59,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 02:26:59,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:59,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:26:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:26:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -289811687, now seen corresponding path program 1 times [2023-11-29 02:26:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:26:59,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040588812] [2023-11-29 02:26:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:26:59,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:26:59,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:26:59,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:26:59,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 02:26:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:26:59,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:26:59,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:26:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:26:59,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:26:59,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:26:59,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040588812] [2023-11-29 02:26:59,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040588812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:26:59,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:26:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:26:59,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803803912] [2023-11-29 02:26:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:26:59,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:26:59,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:26:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:26:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:26:59,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:26:59,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:26:59,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:26:59,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:26:59,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:00,038 INFO L124 PetriNetUnfolderBase]: 1176/2368 cut-off events. [2023-11-29 02:27:00,038 INFO L125 PetriNetUnfolderBase]: For 395/411 co-relation queries the response was YES. [2023-11-29 02:27:00,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4904 conditions, 2368 events. 1176/2368 cut-off events. For 395/411 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12759 event pairs, 422 based on Foata normal form. 0/2280 useless extension candidates. Maximal degree in co-relation 3844. Up to 1340 conditions per place. [2023-11-29 02:27:00,051 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 49 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-29 02:27:00,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 312 flow [2023-11-29 02:27:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:27:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:27:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2023-11-29 02:27:00,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6807511737089202 [2023-11-29 02:27:00,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 145 transitions. [2023-11-29 02:27:00,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 145 transitions. [2023-11-29 02:27:00,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:00,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 145 transitions. [2023-11-29 02:27:00,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,054 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 168 flow. Second operand 3 states and 145 transitions. [2023-11-29 02:27:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 312 flow [2023-11-29 02:27:00,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 307 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:00,056 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 178 flow [2023-11-29 02:27:00,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-29 02:27:00,057 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-29 02:27:00,057 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 178 flow [2023-11-29 02:27:00,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:00,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:00,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:00,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:00,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1834430082, now seen corresponding path program 1 times [2023-11-29 02:27:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755941283] [2023-11-29 02:27:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:00,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:00,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:00,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 02:27:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:00,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:27:00,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:00,395 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 11 treesize of output 9 [2023-11-29 02:27:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:00,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:00,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755941283] [2023-11-29 02:27:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755941283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946567134] [2023-11-29 02:27:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:00,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:27:00,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:27:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:27:00,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:00,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:00,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:00,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:00,613 INFO L124 PetriNetUnfolderBase]: 724/1715 cut-off events. [2023-11-29 02:27:00,613 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2023-11-29 02:27:00,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 1715 events. 724/1715 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 8967 event pairs, 239 based on Foata normal form. 76/1754 useless extension candidates. Maximal degree in co-relation 2500. Up to 668 conditions per place. [2023-11-29 02:27:00,622 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 41 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2023-11-29 02:27:00,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 300 flow [2023-11-29 02:27:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:27:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:27:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2023-11-29 02:27:00,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 02:27:00,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2023-11-29 02:27:00,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2023-11-29 02:27:00,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:00,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2023-11-29 02:27:00,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,625 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 178 flow. Second operand 3 states and 142 transitions. [2023-11-29 02:27:00,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 300 flow [2023-11-29 02:27:00,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 68 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:27:00,629 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 180 flow [2023-11-29 02:27:00,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-29 02:27:00,630 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-29 02:27:00,630 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 180 flow [2023-11-29 02:27:00,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:00,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:00,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 02:27:00,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:00,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:00,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1921886454, now seen corresponding path program 1 times [2023-11-29 02:27:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658167472] [2023-11-29 02:27:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:00,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:00,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 02:27:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:00,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:27:00,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:00,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:00,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658167472] [2023-11-29 02:27:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658167472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:27:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394133569] [2023-11-29 02:27:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:00,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:27:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:27:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:27:00,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:27:00,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:00,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:27:00,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:01,174 INFO L124 PetriNetUnfolderBase]: 649/1452 cut-off events. [2023-11-29 02:27:01,174 INFO L125 PetriNetUnfolderBase]: For 543/547 co-relation queries the response was YES. [2023-11-29 02:27:01,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3247 conditions, 1452 events. 649/1452 cut-off events. For 543/547 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 7207 event pairs, 262 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 2663. Up to 731 conditions per place. [2023-11-29 02:27:01,182 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 47 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-29 02:27:01,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 321 flow [2023-11-29 02:27:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:27:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:27:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-29 02:27:01,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6713615023474179 [2023-11-29 02:27:01,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-29 02:27:01,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-29 02:27:01,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:01,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-29 02:27:01,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,186 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 180 flow. Second operand 3 states and 143 transitions. [2023-11-29 02:27:01,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 321 flow [2023-11-29 02:27:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:01,189 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 178 flow [2023-11-29 02:27:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2023-11-29 02:27:01,190 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-11-29 02:27:01,190 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 178 flow [2023-11-29 02:27:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:01,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:01,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-29 02:27:01,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:01,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:01,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1011115735, now seen corresponding path program 1 times [2023-11-29 02:27:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407844782] [2023-11-29 02:27:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:01,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:01,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:01,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-29 02:27:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:01,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:27:01,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:01,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:01,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:01,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407844782] [2023-11-29 02:27:01,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407844782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:01,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:01,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904417266] [2023-11-29 02:27:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:27:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:27:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:27:01,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 71 [2023-11-29 02:27:01,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:01,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:01,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 71 [2023-11-29 02:27:01,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:02,467 INFO L124 PetriNetUnfolderBase]: 1220/2753 cut-off events. [2023-11-29 02:27:02,467 INFO L125 PetriNetUnfolderBase]: For 1109/1113 co-relation queries the response was YES. [2023-11-29 02:27:02,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5987 conditions, 2753 events. 1220/2753 cut-off events. For 1109/1113 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 15526 event pairs, 407 based on Foata normal form. 0/2653 useless extension candidates. Maximal degree in co-relation 2399. Up to 914 conditions per place. [2023-11-29 02:27:02,478 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 92 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-11-29 02:27:02,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 117 transitions, 576 flow [2023-11-29 02:27:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:27:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 02:27:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-29 02:27:02,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7126760563380282 [2023-11-29 02:27:02,480 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-29 02:27:02,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-29 02:27:02,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-29 02:27:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:02,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:02,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:02,482 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 178 flow. Second operand 5 states and 253 transitions. [2023-11-29 02:27:02,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 117 transitions, 576 flow [2023-11-29 02:27:02,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 02:27:02,486 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 190 flow [2023-11-29 02:27:02,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-29 02:27:02,487 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-11-29 02:27:02,487 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 190 flow [2023-11-29 02:27:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:02,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:02,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:02,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:02,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1265740941, now seen corresponding path program 1 times [2023-11-29 02:27:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:02,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474644625] [2023-11-29 02:27:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:02,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:02,690 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-29 02:27:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:02,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:27:02,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:02,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:02,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474644625] [2023-11-29 02:27:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474644625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:02,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707438563] [2023-11-29 02:27:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:27:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:27:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:27:03,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:03,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:03,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:03,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:03,351 INFO L124 PetriNetUnfolderBase]: 846/1927 cut-off events. [2023-11-29 02:27:03,352 INFO L125 PetriNetUnfolderBase]: For 681/681 co-relation queries the response was YES. [2023-11-29 02:27:03,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4181 conditions, 1927 events. 846/1927 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9610 event pairs, 330 based on Foata normal form. 9/1893 useless extension candidates. Maximal degree in co-relation 1555. Up to 1030 conditions per place. [2023-11-29 02:27:03,359 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 58 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-11-29 02:27:03,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 386 flow [2023-11-29 02:27:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:27:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 02:27:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-11-29 02:27:03,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6690140845070423 [2023-11-29 02:27:03,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2023-11-29 02:27:03,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2023-11-29 02:27:03,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:03,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2023-11-29 02:27:03,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,363 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,363 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 190 flow. Second operand 4 states and 190 transitions. [2023-11-29 02:27:03,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 386 flow [2023-11-29 02:27:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:03,365 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 198 flow [2023-11-29 02:27:03,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-11-29 02:27:03,366 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-29 02:27:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 198 flow [2023-11-29 02:27:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:03,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:03,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:03,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-29 02:27:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:03,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:03,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 553648764, now seen corresponding path program 1 times [2023-11-29 02:27:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:03,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493862407] [2023-11-29 02:27:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:03,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:03,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:03,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-29 02:27:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:03,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:03,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:03,918 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 12 treesize of output 8 [2023-11-29 02:27:04,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 02:27:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:04,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:04,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:04,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493862407] [2023-11-29 02:27:04,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493862407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:04,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:04,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:27:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092678894] [2023-11-29 02:27:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:04,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:27:04,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:04,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:27:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:27:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:04,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 198 flow. Second operand has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:04,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:04,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:04,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:05,237 INFO L124 PetriNetUnfolderBase]: 997/2273 cut-off events. [2023-11-29 02:27:05,237 INFO L125 PetriNetUnfolderBase]: For 920/926 co-relation queries the response was YES. [2023-11-29 02:27:05,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 2273 events. 997/2273 cut-off events. For 920/926 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 12035 event pairs, 364 based on Foata normal form. 17/2253 useless extension candidates. Maximal degree in co-relation 1877. Up to 1388 conditions per place. [2023-11-29 02:27:05,246 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 94 selfloop transitions, 14 changer transitions 0/130 dead transitions. [2023-11-29 02:27:05,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 646 flow [2023-11-29 02:27:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:27:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:27:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 466 transitions. [2023-11-29 02:27:05,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966709346991037 [2023-11-29 02:27:05,249 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 466 transitions. [2023-11-29 02:27:05,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 466 transitions. [2023-11-29 02:27:05,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:05,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 466 transitions. [2023-11-29 02:27:05,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 42.36363636363637) internal successors, (466), 11 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:05,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:05,252 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:05,252 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 198 flow. Second operand 11 states and 466 transitions. [2023-11-29 02:27:05,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 646 flow [2023-11-29 02:27:05,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 130 transitions, 636 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 02:27:05,255 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 306 flow [2023-11-29 02:27:05,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2023-11-29 02:27:05,256 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2023-11-29 02:27:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 306 flow [2023-11-29 02:27:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:05,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:05,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:05,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-29 02:27:05,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:05,457 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:05,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1458487178, now seen corresponding path program 2 times [2023-11-29 02:27:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835891434] [2023-11-29 02:27:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:27:05,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:05,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:05,459 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:05,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-29 02:27:05,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 02:27:05,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:05,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:05,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:05,793 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 12 treesize of output 8 [2023-11-29 02:27:05,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 02:27:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:05,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:05,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:05,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835891434] [2023-11-29 02:27:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835891434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:05,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:05,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:27:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769822677] [2023-11-29 02:27:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:27:05,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:27:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:27:06,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:06,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 306 flow. Second operand has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:06,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:06,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:06,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:07,314 INFO L124 PetriNetUnfolderBase]: 1217/2751 cut-off events. [2023-11-29 02:27:07,314 INFO L125 PetriNetUnfolderBase]: For 2678/2687 co-relation queries the response was YES. [2023-11-29 02:27:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7336 conditions, 2751 events. 1217/2751 cut-off events. For 2678/2687 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 15352 event pairs, 455 based on Foata normal form. 29/2740 useless extension candidates. Maximal degree in co-relation 5285. Up to 1683 conditions per place. [2023-11-29 02:27:07,327 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 99 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2023-11-29 02:27:07,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 862 flow [2023-11-29 02:27:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:27:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:27:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 469 transitions. [2023-11-29 02:27:07,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005121638924455 [2023-11-29 02:27:07,330 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 469 transitions. [2023-11-29 02:27:07,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 469 transitions. [2023-11-29 02:27:07,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:07,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 469 transitions. [2023-11-29 02:27:07,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 42.63636363636363) internal successors, (469), 11 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:07,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:07,334 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:07,335 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 306 flow. Second operand 11 states and 469 transitions. [2023-11-29 02:27:07,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 862 flow [2023-11-29 02:27:07,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 841 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 02:27:07,346 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 515 flow [2023-11-29 02:27:07,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=515, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2023-11-29 02:27:07,347 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-11-29 02:27:07,347 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 515 flow [2023-11-29 02:27:07,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:07,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:07,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:07,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:07,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:07,548 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:07,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -748140422, now seen corresponding path program 3 times [2023-11-29 02:27:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:07,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542778717] [2023-11-29 02:27:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:27:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:07,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:07,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-29 02:27:07,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 02:27:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:07,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:07,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:07,909 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 12 treesize of output 8 [2023-11-29 02:27:08,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 02:27:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:08,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:08,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:08,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542778717] [2023-11-29 02:27:08,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542778717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:08,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:08,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:27:08,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774381203] [2023-11-29 02:27:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:08,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:27:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:27:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:27:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:08,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 515 flow. Second operand has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:08,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:08,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:08,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:09,527 INFO L124 PetriNetUnfolderBase]: 1395/3132 cut-off events. [2023-11-29 02:27:09,528 INFO L125 PetriNetUnfolderBase]: For 6269/6277 co-relation queries the response was YES. [2023-11-29 02:27:09,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9447 conditions, 3132 events. 1395/3132 cut-off events. For 6269/6277 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 18138 event pairs, 470 based on Foata normal form. 15/3109 useless extension candidates. Maximal degree in co-relation 6951. Up to 1996 conditions per place. [2023-11-29 02:27:09,543 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 113 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2023-11-29 02:27:09,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1106 flow [2023-11-29 02:27:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:27:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 02:27:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 467 transitions. [2023-11-29 02:27:09,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5979513444302177 [2023-11-29 02:27:09,546 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 467 transitions. [2023-11-29 02:27:09,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 467 transitions. [2023-11-29 02:27:09,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:09,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 467 transitions. [2023-11-29 02:27:09,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 42.45454545454545) internal successors, (467), 11 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,550 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,550 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 515 flow. Second operand 11 states and 467 transitions. [2023-11-29 02:27:09,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1106 flow [2023-11-29 02:27:09,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1032 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-29 02:27:09,565 INFO L231 Difference]: Finished difference. Result has 114 places, 98 transitions, 644 flow [2023-11-29 02:27:09,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=644, PETRI_PLACES=114, PETRI_TRANSITIONS=98} [2023-11-29 02:27:09,566 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 49 predicate places. [2023-11-29 02:27:09,566 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 98 transitions, 644 flow [2023-11-29 02:27:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:09,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:09,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:09,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-29 02:27:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:09,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:09,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 983782492, now seen corresponding path program 4 times [2023-11-29 02:27:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648456930] [2023-11-29 02:27:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:27:09,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:09,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:09,769 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:09,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-29 02:27:09,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:27:09,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:27:09,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:09,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:10,079 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 12 treesize of output 8 [2023-11-29 02:27:10,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-29 02:27:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:27:10,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:10,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 02:27:10,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648456930] [2023-11-29 02:27:10,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648456930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:10,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:10,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 02:27:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383287623] [2023-11-29 02:27:10,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:27:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 02:27:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:27:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:27:10,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 71 [2023-11-29 02:27:10,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 98 transitions, 644 flow. Second operand has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:10,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:27:10,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 71 [2023-11-29 02:27:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:27:11,556 INFO L124 PetriNetUnfolderBase]: 1549/3453 cut-off events. [2023-11-29 02:27:11,556 INFO L125 PetriNetUnfolderBase]: For 7876/7882 co-relation queries the response was YES. [2023-11-29 02:27:11,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 3453 events. 1549/3453 cut-off events. For 7876/7882 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 20554 event pairs, 314 based on Foata normal form. 15/3430 useless extension candidates. Maximal degree in co-relation 7995. Up to 1139 conditions per place. [2023-11-29 02:27:11,579 INFO L140 encePairwiseOnDemand]: 59/71 looper letters, 112 selfloop transitions, 52 changer transitions 0/186 dead transitions. [2023-11-29 02:27:11,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 186 transitions, 1374 flow [2023-11-29 02:27:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:27:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 02:27:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 591 transitions. [2023-11-29 02:27:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945674044265593 [2023-11-29 02:27:11,583 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 591 transitions. [2023-11-29 02:27:11,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 591 transitions. [2023-11-29 02:27:11,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:27:11,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 591 transitions. [2023-11-29 02:27:11,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 42.214285714285715) internal successors, (591), 14 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:11,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:11,588 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 71.0) internal successors, (1065), 15 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:11,588 INFO L175 Difference]: Start difference. First operand has 114 places, 98 transitions, 644 flow. Second operand 14 states and 591 transitions. [2023-11-29 02:27:11,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 186 transitions, 1374 flow [2023-11-29 02:27:11,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 1328 flow, removed 23 selfloop flow, removed 0 redundant places. [2023-11-29 02:27:11,615 INFO L231 Difference]: Finished difference. Result has 131 places, 107 transitions, 862 flow [2023-11-29 02:27:11,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=862, PETRI_PLACES=131, PETRI_TRANSITIONS=107} [2023-11-29 02:27:11,616 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 66 predicate places. [2023-11-29 02:27:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 107 transitions, 862 flow [2023-11-29 02:27:11,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.7) internal successors, (347), 10 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:27:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:27:11,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:11,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-29 02:27:11,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:11,817 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-29 02:27:11,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 120875536, now seen corresponding path program 1 times [2023-11-29 02:27:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 02:27:11,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764975007] [2023-11-29 02:27:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:11,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 02:27:11,819 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 02:27:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-29 02:27:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:27:12,060 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 02:27:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 02:27:12,229 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2023-11-29 02:27:12,229 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 02:27:12,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2023-11-29 02:27:12,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-11-29 02:27:12,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-11-29 02:27:12,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-11-29 02:27:12,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (5 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-11-29 02:27:12,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-11-29 02:27:12,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:12,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 02:27:12,434 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:27:12,438 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 02:27:12,438 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 02:27:12,475 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-29 02:27:12,476 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated [2023-11-29 02:27:12,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 02:27:12 BasicIcfg [2023-11-29 02:27:12,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 02:27:12,490 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 02:27:12,490 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 02:27:12,490 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 02:27:12,490 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:26:51" (3/4) ... [2023-11-29 02:27:12,492 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-29 02:27:12,492 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 02:27:12,493 INFO L158 Benchmark]: Toolchain (without parser) took 22516.40ms. Allocated memory was 73.4MB in the beginning and 226.5MB in the end (delta: 153.1MB). Free memory was 43.5MB in the beginning and 102.6MB in the end (delta: -59.1MB). Peak memory consumption was 94.0MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,493 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 54.5MB. Free memory is still 30.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:27:12,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 497.80ms. Allocated memory is still 73.4MB. Free memory was 43.1MB in the beginning and 38.9MB in the end (delta: 4.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.13ms. Allocated memory is still 73.4MB. Free memory was 38.9MB in the beginning and 36.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,494 INFO L158 Benchmark]: Boogie Preprocessor took 67.65ms. Allocated memory is still 73.4MB. Free memory was 36.2MB in the beginning and 32.3MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,494 INFO L158 Benchmark]: RCFGBuilder took 907.32ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 32.0MB in the beginning and 50.3MB in the end (delta: -18.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,494 INFO L158 Benchmark]: TraceAbstraction took 20981.51ms. Allocated memory was 88.1MB in the beginning and 226.5MB in the end (delta: 138.4MB). Free memory was 49.4MB in the beginning and 102.6MB in the end (delta: -53.1MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. [2023-11-29 02:27:12,494 INFO L158 Benchmark]: Witness Printer took 2.47ms. Allocated memory is still 226.5MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 02:27:12,496 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 54.5MB. Free memory is still 30.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 497.80ms. Allocated memory is still 73.4MB. Free memory was 43.1MB in the beginning and 38.9MB in the end (delta: 4.2MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.13ms. Allocated memory is still 73.4MB. Free memory was 38.9MB in the beginning and 36.5MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.65ms. Allocated memory is still 73.4MB. Free memory was 36.2MB in the beginning and 32.3MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 907.32ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 32.0MB in the beginning and 50.3MB in the end (delta: -18.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 20981.51ms. Allocated memory was 88.1MB in the beginning and 226.5MB in the end (delta: 138.4MB). Free memory was 49.4MB in the beginning and 102.6MB in the end (delta: -53.1MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. * Witness Printer took 2.47ms. Allocated memory is still 226.5MB. Free memory is still 102.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre13 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 681]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 681. Possible FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={7:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={7:0}, id2={5:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] CALL 2 reach_error() [L681] COND FALSE 2 !(0) VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] [L681] 2 __assert_fail ("0", "", 0, __extension__ __PRETTY_FUNCTION__) VAL [buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 754]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 681]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 102 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 20.8s, OverallIterations: 19, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1293 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1043 mSDsluCounter, 595 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 552 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4171 IncrementalHoareTripleChecker+Invalid, 4198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 43 mSDtfsCounter, 4171 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 313 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=862occurred in iteration=18, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 346 NumberOfCodeBlocks, 346 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 294 ConstructedInterpolants, 19 QuantifiedInterpolants, 3026 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2095 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 7/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-29 02:27:12,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec555ebc-fc2e-42d9-b19a-efc7e7f1df04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample