./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX --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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:33:56,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:33:57,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:33:57,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:33:57,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:33:57,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:33:57,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:33:57,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:33:57,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:33:57,087 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:33:57,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:33:57,089 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:33:57,090 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:33:57,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:33:57,093 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:33:57,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:33:57,094 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:33:57,094 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:33:57,094 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:33:57,095 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:33:57,095 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:33:57,102 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:33:57,102 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:33:57,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:33:57,103 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:33:57,103 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:33:57,103 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:33:57,103 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:33:57,104 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:33:57,104 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:33:57,105 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:33:57,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:33:57,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:33:57,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:33:57,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:33:57,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:33:57,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:33:57,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:33:57,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:33:57,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:33:57,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:33:57,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:33:57,109 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_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2024-11-08 16:33:57,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:33:57,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:33:57,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:33:57,451 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:33:57,451 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:33:57,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i Unable to find full path for "g++" [2024-11-08 16:33:59,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:33:59,858 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:33:59,861 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2024-11-08 16:33:59,886 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/data/1a5d42dbe/a595085e7d0e4168828f4ceb0e969c28/FLAG78af17bb9 [2024-11-08 16:33:59,905 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/data/1a5d42dbe/a595085e7d0e4168828f4ceb0e969c28 [2024-11-08 16:33:59,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:33:59,911 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:33:59,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:33:59,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:33:59,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:33:59,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:33:59" (1/1) ... [2024-11-08 16:33:59,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cd8161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:33:59, skipping insertion in model container [2024-11-08 16:33:59,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:33:59" (1/1) ... [2024-11-08 16:33:59,986 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:34:00,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:34:00,660 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:34:00,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:34:00,838 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:34:00,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00 WrapperNode [2024-11-08 16:34:00,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:34:00,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:34:00,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:34:00,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:34:00,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,877 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,926 INFO L138 Inliner]: procedures = 271, calls = 110, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 263 [2024-11-08 16:34:00,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:34:00,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:34:00,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:34:00,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:34:00,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,954 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,984 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 70, 5, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 60, 5, 0]. The 5 writes are split as follows [0, 4, 0, 1]. [2024-11-08 16:34:00,988 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:00,988 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,019 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:34:01,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:34:01,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:34:01,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:34:01,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (1/1) ... [2024-11-08 16:34:01,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:34:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:01,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:34:01,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:34:01,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 16:34:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:34:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 16:34:01,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:34:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:34:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 16:34:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 16:34:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:34:01,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:34:01,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 16:34:01,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 16:34:01,123 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 16:34:01,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:34:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 16:34:01,124 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 16:34:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:34:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:34:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 16:34:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 16:34:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:34:01,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:34:01,128 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:34:01,289 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:34:01,291 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:34:01,906 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:34:01,906 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:34:02,489 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:34:02,490 INFO L316 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-08 16:34:02,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:34:02 BoogieIcfgContainer [2024-11-08 16:34:02,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:34:02,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:34:02,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:34:02,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:34:02,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:33:59" (1/3) ... [2024-11-08 16:34:02,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229c33a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:34:02, skipping insertion in model container [2024-11-08 16:34:02,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:34:00" (2/3) ... [2024-11-08 16:34:02,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229c33a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:34:02, skipping insertion in model container [2024-11-08 16:34:02,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:34:02" (3/3) ... [2024-11-08 16:34:02,506 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2024-11-08 16:34:02,527 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:34:02,528 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-08 16:34:02,528 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:34:02,621 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-08 16:34:02,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 146 transitions, 299 flow [2024-11-08 16:34:02,795 INFO L124 PetriNetUnfolderBase]: 46/222 cut-off events. [2024-11-08 16:34:02,796 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 16:34:02,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 222 events. 46/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1086 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2024-11-08 16:34:02,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 146 transitions, 299 flow [2024-11-08 16:34:02,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 146 transitions, 299 flow [2024-11-08 16:34:02,827 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:34:02,839 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@598ff0a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:34:02,840 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-08 16:34:02,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:34:02,850 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 16:34:02,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:34:02,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:02,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:34:02,853 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:02,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -480264773, now seen corresponding path program 1 times [2024-11-08 16:34:02,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:02,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100806961] [2024-11-08 16:34:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100806961] [2024-11-08 16:34:03,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100806961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:03,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107291067] [2024-11-08 16:34:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:03,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:03,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2024-11-08 16:34:03,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:03,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:03,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2024-11-08 16:34:03,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:03,901 INFO L124 PetriNetUnfolderBase]: 530/1868 cut-off events. [2024-11-08 16:34:03,901 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-08 16:34:03,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2883 conditions, 1868 events. 530/1868 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 14642 event pairs, 460 based on Foata normal form. 371/1964 useless extension candidates. Maximal degree in co-relation 2771. Up to 1009 conditions per place. [2024-11-08 16:34:03,924 INFO L140 encePairwiseOnDemand]: 118/146 looper letters, 50 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2024-11-08 16:34:03,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 353 flow [2024-11-08 16:34:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2024-11-08 16:34:03,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6506849315068494 [2024-11-08 16:34:03,944 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 299 flow. Second operand 3 states and 285 transitions. [2024-11-08 16:34:03,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 353 flow [2024-11-08 16:34:03,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 121 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 16:34:03,956 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 261 flow [2024-11-08 16:34:03,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-11-08 16:34:03,964 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-08 16:34:03,965 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 261 flow [2024-11-08 16:34:03,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:03,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:03,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:03,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:34:03,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:03,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -866089766, now seen corresponding path program 1 times [2024-11-08 16:34:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:03,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317256764] [2024-11-08 16:34:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317256764] [2024-11-08 16:34:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317256764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880337615] [2024-11-08 16:34:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:04,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:04,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:04,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:34:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:04,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:34:04,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:04,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:04,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880337615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:04,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:04,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 16:34:04,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247068998] [2024-11-08 16:34:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:04,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:34:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:34:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:04,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2024-11-08 16:34:04,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:04,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:04,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2024-11-08 16:34:04,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:04,932 INFO L124 PetriNetUnfolderBase]: 529/1872 cut-off events. [2024-11-08 16:34:04,933 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-08 16:34:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2902 conditions, 1872 events. 529/1872 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 14650 event pairs, 460 based on Foata normal form. 3/1601 useless extension candidates. Maximal degree in co-relation 2888. Up to 1007 conditions per place. [2024-11-08 16:34:04,948 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 52 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2024-11-08 16:34:04,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 389 flow [2024-11-08 16:34:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:34:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:34:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 472 transitions. [2024-11-08 16:34:04,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5388127853881278 [2024-11-08 16:34:04,953 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 261 flow. Second operand 6 states and 472 transitions. [2024-11-08 16:34:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 389 flow [2024-11-08 16:34:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:34:04,958 INFO L231 Difference]: Finished difference. Result has 127 places, 123 transitions, 295 flow [2024-11-08 16:34:04,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=127, PETRI_TRANSITIONS=123} [2024-11-08 16:34:04,959 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2024-11-08 16:34:04,960 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 123 transitions, 295 flow [2024-11-08 16:34:04,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:04,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:04,961 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:04,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:34:05,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:05,166 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:05,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash 725777716, now seen corresponding path program 2 times [2024-11-08 16:34:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:05,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991526938] [2024-11-08 16:34:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:05,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:34:05,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991526938] [2024-11-08 16:34:05,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991526938] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:05,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:05,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:05,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569726761] [2024-11-08 16:34:05,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:05,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:05,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:05,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 146 [2024-11-08 16:34:05,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 123 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:05,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:05,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 146 [2024-11-08 16:34:05,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:05,919 INFO L124 PetriNetUnfolderBase]: 586/1960 cut-off events. [2024-11-08 16:34:05,920 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-08 16:34:05,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1960 events. 586/1960 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15351 event pairs, 0 based on Foata normal form. 2/1669 useless extension candidates. Maximal degree in co-relation 3071. Up to 1097 conditions per place. [2024-11-08 16:34:05,935 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 75 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2024-11-08 16:34:05,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 144 transitions, 491 flow [2024-11-08 16:34:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-08 16:34:05,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.634703196347032 [2024-11-08 16:34:05,938 INFO L175 Difference]: Start difference. First operand has 127 places, 123 transitions, 295 flow. Second operand 3 states and 278 transitions. [2024-11-08 16:34:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 144 transitions, 491 flow [2024-11-08 16:34:05,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 144 transitions, 483 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 16:34:05,948 INFO L231 Difference]: Finished difference. Result has 129 places, 123 transitions, 299 flow [2024-11-08 16:34:05,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=129, PETRI_TRANSITIONS=123} [2024-11-08 16:34:05,950 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 11 predicate places. [2024-11-08 16:34:05,950 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 123 transitions, 299 flow [2024-11-08 16:34:05,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:05,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:05,951 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:05,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:34:05,952 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:05,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash 725777715, now seen corresponding path program 1 times [2024-11-08 16:34:05,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:05,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86759637] [2024-11-08 16:34:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:05,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:34:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86759637] [2024-11-08 16:34:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86759637] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:06,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:06,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91905436] [2024-11-08 16:34:06,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:06,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:06,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 146 [2024-11-08 16:34:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 123 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:06,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 146 [2024-11-08 16:34:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:06,510 INFO L124 PetriNetUnfolderBase]: 572/1909 cut-off events. [2024-11-08 16:34:06,510 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-08 16:34:06,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1909 events. 572/1909 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14649 event pairs, 460 based on Foata normal form. 0/1673 useless extension candidates. Maximal degree in co-relation 3025. Up to 984 conditions per place. [2024-11-08 16:34:06,524 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 72 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-11-08 16:34:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 141 transitions, 483 flow [2024-11-08 16:34:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2024-11-08 16:34:06,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255707762557078 [2024-11-08 16:34:06,526 INFO L175 Difference]: Start difference. First operand has 129 places, 123 transitions, 299 flow. Second operand 3 states and 274 transitions. [2024-11-08 16:34:06,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 141 transitions, 483 flow [2024-11-08 16:34:06,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 141 transitions, 479 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:34:06,531 INFO L231 Difference]: Finished difference. Result has 127 places, 121 transitions, 295 flow [2024-11-08 16:34:06,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=127, PETRI_TRANSITIONS=121} [2024-11-08 16:34:06,532 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2024-11-08 16:34:06,533 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 121 transitions, 295 flow [2024-11-08 16:34:06,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:06,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:06,534 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:06,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:34:06,534 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:06,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1631384213, now seen corresponding path program 1 times [2024-11-08 16:34:06,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:06,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919241919] [2024-11-08 16:34:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919241919] [2024-11-08 16:34:06,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919241919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197072518] [2024-11-08 16:34:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:06,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:06,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:34:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:06,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:34:06,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:06,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197072518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:06,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 16:34:06,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34166251] [2024-11-08 16:34:06,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:06,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:34:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:06,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:34:06,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:34:06,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2024-11-08 16:34:06,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 121 transitions, 295 flow. Second operand has 13 states, 13 states have (on average 70.07692307692308) internal successors, (911), 13 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:06,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:06,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2024-11-08 16:34:06,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:07,380 INFO L124 PetriNetUnfolderBase]: 528/1826 cut-off events. [2024-11-08 16:34:07,381 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-08 16:34:07,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1826 events. 528/1826 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13934 event pairs, 460 based on Foata normal form. 6/1584 useless extension candidates. Maximal degree in co-relation 2843. Up to 987 conditions per place. [2024-11-08 16:34:07,394 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 58 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2024-11-08 16:34:07,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 519 flow [2024-11-08 16:34:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:34:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:34:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 892 transitions. [2024-11-08 16:34:07,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5091324200913242 [2024-11-08 16:34:07,399 INFO L175 Difference]: Start difference. First operand has 127 places, 121 transitions, 295 flow. Second operand 12 states and 892 transitions. [2024-11-08 16:34:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 519 flow [2024-11-08 16:34:07,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 136 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:34:07,406 INFO L231 Difference]: Finished difference. Result has 143 places, 128 transitions, 387 flow [2024-11-08 16:34:07,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=387, PETRI_PLACES=143, PETRI_TRANSITIONS=128} [2024-11-08 16:34:07,410 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 25 predicate places. [2024-11-08 16:34:07,411 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 128 transitions, 387 flow [2024-11-08 16:34:07,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.07692307692308) internal successors, (911), 13 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:07,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:07,412 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:07,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:34:07,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:07,613 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:07,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -168123167, now seen corresponding path program 2 times [2024-11-08 16:34:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773396739] [2024-11-08 16:34:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:34:07,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:07,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773396739] [2024-11-08 16:34:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773396739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:07,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124291945] [2024-11-08 16:34:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:34:07,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:07,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:07,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:34:08,020 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:34:08,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:08,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:34:08,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:08,075 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 8 treesize of output 1 [2024-11-08 16:34:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:34:08,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:34:08,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124291945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:08,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:34:08,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-08 16:34:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168486792] [2024-11-08 16:34:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:08,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:08,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:08,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2024-11-08 16:34:08,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 128 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:08,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:08,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2024-11-08 16:34:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:08,810 INFO L124 PetriNetUnfolderBase]: 567/1896 cut-off events. [2024-11-08 16:34:08,810 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-08 16:34:08,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3140 conditions, 1896 events. 567/1896 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14652 event pairs, 6 based on Foata normal form. 42/1707 useless extension candidates. Maximal degree in co-relation 3025. Up to 918 conditions per place. [2024-11-08 16:34:08,826 INFO L140 encePairwiseOnDemand]: 140/146 looper letters, 119 selfloop transitions, 4 changer transitions 0/188 dead transitions. [2024-11-08 16:34:08,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 749 flow [2024-11-08 16:34:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:34:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2024-11-08 16:34:08,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6109589041095891 [2024-11-08 16:34:08,829 INFO L175 Difference]: Start difference. First operand has 143 places, 128 transitions, 387 flow. Second operand 5 states and 446 transitions. [2024-11-08 16:34:08,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 749 flow [2024-11-08 16:34:08,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 188 transitions, 743 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:34:08,835 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 388 flow [2024-11-08 16:34:08,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2024-11-08 16:34:08,836 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 26 predicate places. [2024-11-08 16:34:08,837 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 388 flow [2024-11-08 16:34:08,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:08,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:08,837 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:08,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:34:09,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 16:34:09,039 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 16:34:09,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -916850092, now seen corresponding path program 1 times [2024-11-08 16:34:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:09,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809830407] [2024-11-08 16:34:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 16:34:09,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 16:34:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 16:34:09,129 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 16:34:09,129 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 16:34:09,130 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-08 16:34:09,132 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-08 16:34:09,133 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-08 16:34:09,133 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-08 16:34:09,133 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-08 16:34:09,133 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-08 16:34:09,134 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-08 16:34:09,134 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-08 16:34:09,134 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-08 16:34:09,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-08 16:34:09,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-08 16:34:09,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-08 16:34:09,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-08 16:34:09,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-08 16:34:09,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-08 16:34:09,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-08 16:34:09,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-08 16:34:09,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-08 16:34:09,138 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-08 16:34:09,139 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-08 16:34:09,139 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-08 16:34:09,139 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-08 16:34:09,139 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-08 16:34:09,139 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-08 16:34:09,140 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-08 16:34:09,140 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-08 16:34:09,140 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-08 16:34:09,140 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-08 16:34:09,140 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-08 16:34:09,141 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-08 16:34:09,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-08 16:34:09,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-08 16:34:09,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-08 16:34:09,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-08 16:34:09,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:34:09,150 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-08 16:34:09,153 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 16:34:09,153 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-08 16:34:09,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 16:34:09,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 207 transitions, 430 flow [2024-11-08 16:34:09,260 INFO L124 PetriNetUnfolderBase]: 77/374 cut-off events. [2024-11-08 16:34:09,261 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 16:34:09,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 374 events. 77/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2044 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 224. Up to 12 conditions per place. [2024-11-08 16:34:09,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 207 transitions, 430 flow [2024-11-08 16:34:09,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 207 transitions, 430 flow [2024-11-08 16:34:09,272 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:34:09,273 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@598ff0a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:34:09,273 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-08 16:34:09,277 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:34:09,277 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 16:34:09,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:34:09,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:09,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:34:09,278 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:09,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1348543323, now seen corresponding path program 1 times [2024-11-08 16:34:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:09,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940411375] [2024-11-08 16:34:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:09,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:09,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940411375] [2024-11-08 16:34:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940411375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:09,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:09,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890356149] [2024-11-08 16:34:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:09,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:09,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 207 [2024-11-08 16:34:09,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:09,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:09,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 207 [2024-11-08 16:34:09,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:16,083 INFO L124 PetriNetUnfolderBase]: 22066/49394 cut-off events. [2024-11-08 16:34:16,083 INFO L125 PetriNetUnfolderBase]: For 147/176 co-relation queries the response was YES. [2024-11-08 16:34:16,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81836 conditions, 49394 events. 22066/49394 cut-off events. For 147/176 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 552245 event pairs, 20300 based on Foata normal form. 12185/55864 useless extension candidates. Maximal degree in co-relation 78707. Up to 32329 conditions per place. [2024-11-08 16:34:16,468 INFO L140 encePairwiseOnDemand]: 167/207 looper letters, 72 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2024-11-08 16:34:16,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 502 flow [2024-11-08 16:34:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2024-11-08 16:34:16,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6392914653784219 [2024-11-08 16:34:16,471 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 430 flow. Second operand 3 states and 397 transitions. [2024-11-08 16:34:16,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 502 flow [2024-11-08 16:34:16,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 16:34:16,476 INFO L231 Difference]: Finished difference. Result has 167 places, 169 transitions, 366 flow [2024-11-08 16:34:16,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=167, PETRI_TRANSITIONS=169} [2024-11-08 16:34:16,479 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 0 predicate places. [2024-11-08 16:34:16,479 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 169 transitions, 366 flow [2024-11-08 16:34:16,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:16,481 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:16,481 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:16,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 16:34:16,481 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:16,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash -23126951, now seen corresponding path program 1 times [2024-11-08 16:34:16,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:16,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304189524] [2024-11-08 16:34:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304189524] [2024-11-08 16:34:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304189524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427447601] [2024-11-08 16:34:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:16,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:16,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:34:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:16,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 16:34:16,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:16,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:34:16,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427447601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:16,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 16:34:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906695838] [2024-11-08 16:34:16,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:16,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:34:16,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:34:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:34:16,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 207 [2024-11-08 16:34:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 169 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:16,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:16,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 207 [2024-11-08 16:34:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:21,414 INFO L124 PetriNetUnfolderBase]: 22065/49398 cut-off events. [2024-11-08 16:34:21,414 INFO L125 PetriNetUnfolderBase]: For 147/176 co-relation queries the response was YES. [2024-11-08 16:34:21,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81855 conditions, 49398 events. 22065/49398 cut-off events. For 147/176 co-relation queries the response was YES. Maximal size of possible extension queue 1523. Compared 552117 event pairs, 20300 based on Foata normal form. 3/43687 useless extension candidates. Maximal degree in co-relation 81840. Up to 32327 conditions per place. [2024-11-08 16:34:21,782 INFO L140 encePairwiseOnDemand]: 202/207 looper letters, 74 selfloop transitions, 6 changer transitions 0/174 dead transitions. [2024-11-08 16:34:21,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 174 transitions, 538 flow [2024-11-08 16:34:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:34:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:34:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 650 transitions. [2024-11-08 16:34:21,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5233494363929146 [2024-11-08 16:34:21,787 INFO L175 Difference]: Start difference. First operand has 167 places, 169 transitions, 366 flow. Second operand 6 states and 650 transitions. [2024-11-08 16:34:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 174 transitions, 538 flow [2024-11-08 16:34:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 174 transitions, 536 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:34:21,793 INFO L231 Difference]: Finished difference. Result has 175 places, 171 transitions, 400 flow [2024-11-08 16:34:21,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=175, PETRI_TRANSITIONS=171} [2024-11-08 16:34:21,796 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 8 predicate places. [2024-11-08 16:34:21,796 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 171 transitions, 400 flow [2024-11-08 16:34:21,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:21,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:21,797 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:21,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 16:34:21,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 16:34:21,999 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:21,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash -468526509, now seen corresponding path program 2 times [2024-11-08 16:34:21,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:22,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512652427] [2024-11-08 16:34:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:34:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512652427] [2024-11-08 16:34:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512652427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:22,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:22,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475255219] [2024-11-08 16:34:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:22,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:22,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 207 [2024-11-08 16:34:22,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 171 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 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) [2024-11-08 16:34:22,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 207 [2024-11-08 16:34:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:27,302 INFO L124 PetriNetUnfolderBase]: 23859/52226 cut-off events. [2024-11-08 16:34:27,302 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-11-08 16:34:27,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87423 conditions, 52226 events. 23859/52226 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 578440 event pairs, 20280 based on Foata normal form. 0/46684 useless extension candidates. Maximal degree in co-relation 87379. Up to 32270 conditions per place. [2024-11-08 16:34:27,894 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 114 selfloop transitions, 2 changer transitions 0/209 dead transitions. [2024-11-08 16:34:27,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 209 transitions, 708 flow [2024-11-08 16:34:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2024-11-08 16:34:27,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344605475040258 [2024-11-08 16:34:27,896 INFO L175 Difference]: Start difference. First operand has 175 places, 171 transitions, 400 flow. Second operand 3 states and 394 transitions. [2024-11-08 16:34:27,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 209 transitions, 708 flow [2024-11-08 16:34:27,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 209 transitions, 700 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 16:34:27,901 INFO L231 Difference]: Finished difference. Result has 174 places, 169 transitions, 392 flow [2024-11-08 16:34:27,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=174, PETRI_TRANSITIONS=169} [2024-11-08 16:34:27,902 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 7 predicate places. [2024-11-08 16:34:27,902 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 169 transitions, 392 flow [2024-11-08 16:34:27,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 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) [2024-11-08 16:34:27,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:27,903 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:27,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 16:34:27,904 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:27,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -468526508, now seen corresponding path program 1 times [2024-11-08 16:34:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767524243] [2024-11-08 16:34:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 16:34:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767524243] [2024-11-08 16:34:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767524243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:34:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962794750] [2024-11-08 16:34:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:28,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:34:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:34:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:34:28,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 207 [2024-11-08 16:34:28,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 169 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 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) [2024-11-08 16:34:28,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:28,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 207 [2024-11-08 16:34:28,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:33,206 INFO L124 PetriNetUnfolderBase]: 25395/56556 cut-off events. [2024-11-08 16:34:33,207 INFO L125 PetriNetUnfolderBase]: For 698/723 co-relation queries the response was YES. [2024-11-08 16:34:33,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93958 conditions, 56556 events. 25395/56556 cut-off events. For 698/723 co-relation queries the response was YES. Maximal size of possible extension queue 1575. Compared 633501 event pairs, 21674 based on Foata normal form. 2/49576 useless extension candidates. Maximal degree in co-relation 93917. Up to 36756 conditions per place. [2024-11-08 16:34:33,602 INFO L140 encePairwiseOnDemand]: 202/207 looper letters, 98 selfloop transitions, 2 changer transitions 0/191 dead transitions. [2024-11-08 16:34:33,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 191 transitions, 636 flow [2024-11-08 16:34:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:34:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:34:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2024-11-08 16:34:33,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6103059581320451 [2024-11-08 16:34:33,605 INFO L175 Difference]: Start difference. First operand has 174 places, 169 transitions, 392 flow. Second operand 3 states and 379 transitions. [2024-11-08 16:34:33,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 191 transitions, 636 flow [2024-11-08 16:34:33,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 191 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:34:33,673 INFO L231 Difference]: Finished difference. Result has 175 places, 170 transitions, 404 flow [2024-11-08 16:34:33,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=175, PETRI_TRANSITIONS=170} [2024-11-08 16:34:33,674 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 8 predicate places. [2024-11-08 16:34:33,674 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 170 transitions, 404 flow [2024-11-08 16:34:33,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 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) [2024-11-08 16:34:33,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:33,675 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:33,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:34:33,675 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:33,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1564511937, now seen corresponding path program 1 times [2024-11-08 16:34:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:33,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549178554] [2024-11-08 16:34:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:33,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549178554] [2024-11-08 16:34:33,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549178554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:33,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143436404] [2024-11-08 16:34:33,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:33,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:33,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:33,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:33,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:34:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:33,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:34:33,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:33,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:34:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:34:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143436404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:34:34,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:34:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 16:34:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589501386] [2024-11-08 16:34:34,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:34:34,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 16:34:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 16:34:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:34:34,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 207 [2024-11-08 16:34:34,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 170 transitions, 404 flow. Second operand has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:34,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:34,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 207 [2024-11-08 16:34:34,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:39,355 INFO L124 PetriNetUnfolderBase]: 22241/50229 cut-off events. [2024-11-08 16:34:39,355 INFO L125 PetriNetUnfolderBase]: For 697/722 co-relation queries the response was YES. [2024-11-08 16:34:39,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83257 conditions, 50229 events. 22241/50229 cut-off events. For 697/722 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 563983 event pairs, 20300 based on Foata normal form. 6/44213 useless extension candidates. Maximal degree in co-relation 83162. Up to 32309 conditions per place. [2024-11-08 16:34:39,655 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 81 selfloop transitions, 12 changer transitions 0/185 dead transitions. [2024-11-08 16:34:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 674 flow [2024-11-08 16:34:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:34:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:34:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1226 transitions. [2024-11-08 16:34:39,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49355877616747185 [2024-11-08 16:34:39,659 INFO L175 Difference]: Start difference. First operand has 175 places, 170 transitions, 404 flow. Second operand 12 states and 1226 transitions. [2024-11-08 16:34:39,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 674 flow [2024-11-08 16:34:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 185 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:34:39,666 INFO L231 Difference]: Finished difference. Result has 192 places, 177 transitions, 498 flow [2024-11-08 16:34:39,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=192, PETRI_TRANSITIONS=177} [2024-11-08 16:34:39,667 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 25 predicate places. [2024-11-08 16:34:39,667 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 177 transitions, 498 flow [2024-11-08 16:34:39,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 96.07692307692308) internal successors, (1249), 13 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:39,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:39,669 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:39,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:34:39,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 16:34:39,873 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:39,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1957443509, now seen corresponding path program 2 times [2024-11-08 16:34:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790560028] [2024-11-08 16:34:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:34:40,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790560028] [2024-11-08 16:34:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790560028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:34:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550260909] [2024-11-08 16:34:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:34:40,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:34:40,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:34:40,159 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:34:40,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:34:40,298 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:34:40,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:34:40,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:34:40,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:34:40,313 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 8 treesize of output 1 [2024-11-08 16:34:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:34:40,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:34:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550260909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:40,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:34:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-08 16:34:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703762201] [2024-11-08 16:34:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:40,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:34:40,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 207 [2024-11-08 16:34:40,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 177 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:40,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:40,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 207 [2024-11-08 16:34:40,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:34:46,566 INFO L124 PetriNetUnfolderBase]: 24290/54320 cut-off events. [2024-11-08 16:34:46,566 INFO L125 PetriNetUnfolderBase]: For 1974/1974 co-relation queries the response was YES. [2024-11-08 16:34:46,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91263 conditions, 54320 events. 24290/54320 cut-off events. For 1974/1974 co-relation queries the response was YES. Maximal size of possible extension queue 1611. Compared 618333 event pairs, 1593 based on Foata normal form. 924/49151 useless extension candidates. Maximal degree in co-relation 91147. Up to 29618 conditions per place. [2024-11-08 16:34:46,933 INFO L140 encePairwiseOnDemand]: 201/207 looper letters, 181 selfloop transitions, 5 changer transitions 0/277 dead transitions. [2024-11-08 16:34:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 277 transitions, 1066 flow [2024-11-08 16:34:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:34:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:34:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 639 transitions. [2024-11-08 16:34:46,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6173913043478261 [2024-11-08 16:34:46,937 INFO L175 Difference]: Start difference. First operand has 192 places, 177 transitions, 498 flow. Second operand 5 states and 639 transitions. [2024-11-08 16:34:46,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 277 transitions, 1066 flow [2024-11-08 16:34:46,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 277 transitions, 1060 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:34:46,949 INFO L231 Difference]: Finished difference. Result has 193 places, 176 transitions, 502 flow [2024-11-08 16:34:46,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=502, PETRI_PLACES=193, PETRI_TRANSITIONS=176} [2024-11-08 16:34:46,949 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 26 predicate places. [2024-11-08 16:34:46,949 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 176 transitions, 502 flow [2024-11-08 16:34:46,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:46,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:34:46,950 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:34:46,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:34:47,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85a449b4-0581-4e27-8601-a6808b41012b/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 16:34:47,151 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 16:34:47,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:34:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 241083684, now seen corresponding path program 1 times [2024-11-08 16:34:47,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:34:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215706030] [2024-11-08 16:34:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:34:47,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:34:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:34:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 16:34:47,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:34:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215706030] [2024-11-08 16:34:47,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215706030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:34:47,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:34:47,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:34:47,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053708704] [2024-11-08 16:34:47,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:34:47,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:34:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:34:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:34:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:34:47,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 207 [2024-11-08 16:34:47,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 176 transitions, 502 flow. Second operand has 5 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:34:47,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:34:47,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 207 [2024-11-08 16:34:47,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand