./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:39:16,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:39:16,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:39:16,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:39:16,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:39:16,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:39:16,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:39:16,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:39:16,288 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:39:16,288 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:39:16,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:39:16,289 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:39:16,290 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:39:16,291 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:39:16,291 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:39:16,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:39:16,292 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:39:16,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:39:16,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:39:16,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:39:16,294 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:39:16,294 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:39:16,295 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:39:16,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:39:16,296 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:39:16,296 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:39:16,296 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:39:16,297 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:39:16,297 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:39:16,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:39:16,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:39:16,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:39:16,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:16,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:39:16,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:39:16,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:39:16,312 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_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a178b12ba1b75e8e390c539a1b1599b5e56cbe73098e0c8e7ca0eeb62a619e80 [2023-11-29 00:39:16,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:39:16,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:39:16,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:39:16,555 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:39:16,556 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:39:16,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-29 00:39:19,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:39:19,457 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:39:19,458 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/sv-benchmarks/c/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-29 00:39:19,475 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/data/49a42dc22/f0f1b4be6e754707a43ecf2276731ff2/FLAG452efc47e [2023-11-29 00:39:19,487 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/data/49a42dc22/f0f1b4be6e754707a43ecf2276731ff2 [2023-11-29 00:39:19,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:39:19,492 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:39:19,493 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:19,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:39:19,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:39:19,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7632d241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19, skipping insertion in model container [2023-11-29 00:39:19,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:39:19,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:19,846 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:39:19,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:19,917 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:39:19,923 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:39:19,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19 WrapperNode [2023-11-29 00:39:19,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:19,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:19,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:39:19,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:39:19,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,971 INFO L138 Inliner]: procedures = 174, calls = 45, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 154 [2023-11-29 00:39:19,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:19,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:39:19,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:39:19,973 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:39:19,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:19,986 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,002 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 2, 5]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 0, 5]. The 1 writes are split as follows [0, 0, 0, 1, 0]. [2023-11-29 00:39:20,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,012 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,016 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,019 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,021 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,025 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:39:20,026 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:39:20,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:39:20,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:39:20,027 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (1/1) ... [2023-11-29 00:39:20,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:20,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:39:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:39:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:39:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:39:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:39:20,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:39:20,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:39:20,091 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:39:20,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:39:20,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:39:20,091 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 00:39:20,092 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 00:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:39:20,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:39:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:39:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:39:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:39:20,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:39:20,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:39:20,095 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:39:20,234 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:39:20,236 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:39:20,479 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:39:20,691 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:39:20,691 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 00:39:20,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:39:20 BoogieIcfgContainer [2023-11-29 00:39:20,692 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:39:20,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:39:20,695 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:39:20,697 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:39:20,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:39:19" (1/3) ... [2023-11-29 00:39:20,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6306619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:39:20, skipping insertion in model container [2023-11-29 00:39:20,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:19" (2/3) ... [2023-11-29 00:39:20,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6306619e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:39:20, skipping insertion in model container [2023-11-29 00:39:20,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:39:20" (3/3) ... [2023-11-29 00:39:20,700 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-29 00:39:20,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:39:20,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-29 00:39:20,716 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:39:20,751 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 00:39:20,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 65 transitions, 137 flow [2023-11-29 00:39:20,823 INFO L124 PetriNetUnfolderBase]: 21/104 cut-off events. [2023-11-29 00:39:20,823 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:39:20,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 104 events. 21/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 380 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 60. Up to 6 conditions per place. [2023-11-29 00:39:20,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 65 transitions, 137 flow [2023-11-29 00:39:20,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 65 transitions, 137 flow [2023-11-29 00:39:20,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:39:20,848 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ae86a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:39:20,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-29 00:39:20,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:39:20,853 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:39:20,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:39:20,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:20,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:20,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 00:39:20,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 430626, now seen corresponding path program 1 times [2023-11-29 00:39:20,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:20,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854640420] [2023-11-29 00:39:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:21,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:21,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854640420] [2023-11-29 00:39:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854640420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:21,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:21,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:21,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868195031] [2023-11-29 00:39:21,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:21,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:21,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 65 [2023-11-29 00:39:21,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:21,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 65 [2023-11-29 00:39:21,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:21,358 INFO L124 PetriNetUnfolderBase]: 173/517 cut-off events. [2023-11-29 00:39:21,358 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:39:21,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 517 events. 173/517 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2789 event pairs, 136 based on Foata normal form. 97/576 useless extension candidates. Maximal degree in co-relation 828. Up to 337 conditions per place. [2023-11-29 00:39:21,365 INFO L140 encePairwiseOnDemand]: 51/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-29 00:39:21,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 209 flow [2023-11-29 00:39:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-29 00:39:21,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2023-11-29 00:39:21,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-29 00:39:21,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-29 00:39:21,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:21,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-29 00:39:21,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,391 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 137 flow. Second operand 3 states and 114 transitions. [2023-11-29 00:39:21,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 209 flow [2023-11-29 00:39:21,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:39:21,399 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 115 flow [2023-11-29 00:39:21,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-11-29 00:39:21,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2023-11-29 00:39:21,405 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 115 flow [2023-11-29 00:39:21,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:21,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:21,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:39:21,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 00:39:21,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 430627, now seen corresponding path program 1 times [2023-11-29 00:39:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400291148] [2023-11-29 00:39:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:21,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400291148] [2023-11-29 00:39:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400291148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:21,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59464338] [2023-11-29 00:39:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:21,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 65 [2023-11-29 00:39:21,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:21,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 65 [2023-11-29 00:39:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:21,693 INFO L124 PetriNetUnfolderBase]: 162/472 cut-off events. [2023-11-29 00:39:21,693 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-29 00:39:21,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 472 events. 162/472 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2373 event pairs, 119 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 799. Up to 329 conditions per place. [2023-11-29 00:39:21,698 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 39 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-29 00:39:21,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 215 flow [2023-11-29 00:39:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-29 00:39:21,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558974358974359 [2023-11-29 00:39:21,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-29 00:39:21,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-29 00:39:21,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:21,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-29 00:39:21,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,704 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 115 flow. Second operand 3 states and 109 transitions. [2023-11-29 00:39:21,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 215 flow [2023-11-29 00:39:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 211 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:39:21,708 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 121 flow [2023-11-29 00:39:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2023-11-29 00:39:21,709 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-11-29 00:39:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 121 flow [2023-11-29 00:39:21,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:21,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:39:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:39:21,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 00:39:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1726680867, now seen corresponding path program 1 times [2023-11-29 00:39:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785114892] [2023-11-29 00:39:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:21,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785114892] [2023-11-29 00:39:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785114892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204059266] [2023-11-29 00:39:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:21,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:21,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:21,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:39:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:21,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:39:21,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:22,021 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 [2023-11-29 00:39:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:22,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204059266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:22,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 00:39:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611220551] [2023-11-29 00:39:22,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:22,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:39:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:39:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:39:22,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 65 [2023-11-29 00:39:22,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 121 flow. Second operand has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:22,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 65 [2023-11-29 00:39:22,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:22,323 INFO L124 PetriNetUnfolderBase]: 24/79 cut-off events. [2023-11-29 00:39:22,323 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-29 00:39:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 79 events. 24/79 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 242 event pairs, 0 based on Foata normal form. 18/96 useless extension candidates. Maximal degree in co-relation 143. Up to 51 conditions per place. [2023-11-29 00:39:22,324 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-29 00:39:22,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 118 flow [2023-11-29 00:39:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:39:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:39:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2023-11-29 00:39:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2023-11-29 00:39:22,326 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 109 transitions. [2023-11-29 00:39:22,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 109 transitions. [2023-11-29 00:39:22,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:22,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 109 transitions. [2023-11-29 00:39:22,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,329 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 121 flow. Second operand 4 states and 109 transitions. [2023-11-29 00:39:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 118 flow [2023-11-29 00:39:22,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:22,331 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 50 flow [2023-11-29 00:39:22,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-29 00:39:22,332 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -28 predicate places. [2023-11-29 00:39:22,332 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 50 flow [2023-11-29 00:39:22,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:22,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 00:39:22,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:39:22,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:22,534 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-29 00:39:22,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1987498930, now seen corresponding path program 1 times [2023-11-29 00:39:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:22,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137300467] [2023-11-29 00:39:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:39:22,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:39:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:39:22,580 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:39:22,580 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:39:22,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-29 00:39:22,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-29 00:39:22,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-29 00:39:22,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-29 00:39:22,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-29 00:39:22,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-29 00:39:22,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-29 00:39:22,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-29 00:39:22,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:39:22,584 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:39:22,586 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:39:22,587 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 00:39:22,609 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:39:22,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 87 transitions, 190 flow [2023-11-29 00:39:22,630 INFO L124 PetriNetUnfolderBase]: 35/177 cut-off events. [2023-11-29 00:39:22,630 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-29 00:39:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 177 events. 35/177 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 757 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 108. Up to 9 conditions per place. [2023-11-29 00:39:22,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 87 transitions, 190 flow [2023-11-29 00:39:22,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 87 transitions, 190 flow [2023-11-29 00:39:22,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:39:22,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ae86a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:39:22,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-29 00:39:22,639 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:39:22,639 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:39:22,639 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:39:22,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:22,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:22,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:39:22,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash 517017, now seen corresponding path program 1 times [2023-11-29 00:39:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060598811] [2023-11-29 00:39:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:22,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:22,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060598811] [2023-11-29 00:39:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060598811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:22,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:22,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853634426] [2023-11-29 00:39:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:22,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:22,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2023-11-29 00:39:22,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:22,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:22,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2023-11-29 00:39:22,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:23,510 INFO L124 PetriNetUnfolderBase]: 3201/6416 cut-off events. [2023-11-29 00:39:23,510 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-29 00:39:23,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11544 conditions, 6416 events. 3201/6416 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 49889 event pairs, 2688 based on Foata normal form. 1446/7476 useless extension candidates. Maximal degree in co-relation 8154. Up to 4555 conditions per place. [2023-11-29 00:39:23,564 INFO L140 encePairwiseOnDemand]: 69/87 looper letters, 57 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-29 00:39:23,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 304 flow [2023-11-29 00:39:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2023-11-29 00:39:23,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2023-11-29 00:39:23,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 161 transitions. [2023-11-29 00:39:23,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 161 transitions. [2023-11-29 00:39:23,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:23,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 161 transitions. [2023-11-29 00:39:23,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:23,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:23,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:23,569 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 190 flow. Second operand 3 states and 161 transitions. [2023-11-29 00:39:23,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 304 flow [2023-11-29 00:39:23,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 85 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:39:23,573 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 158 flow [2023-11-29 00:39:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-11-29 00:39:23,575 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2023-11-29 00:39:23,575 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 158 flow [2023-11-29 00:39:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:23,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:23,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:23,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:39:23,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:39:23,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash 517018, now seen corresponding path program 1 times [2023-11-29 00:39:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:23,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575416767] [2023-11-29 00:39:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:23,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:23,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575416767] [2023-11-29 00:39:23,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575416767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:23,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:23,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:23,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618519412] [2023-11-29 00:39:23,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:23,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:23,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2023-11-29 00:39:23,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:23,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:23,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2023-11-29 00:39:23,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:24,414 INFO L124 PetriNetUnfolderBase]: 3038/6175 cut-off events. [2023-11-29 00:39:24,414 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-29 00:39:24,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11129 conditions, 6175 events. 3038/6175 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 48273 event pairs, 1328 based on Foata normal form. 1/5801 useless extension candidates. Maximal degree in co-relation 9845. Up to 4789 conditions per place. [2023-11-29 00:39:24,461 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 50 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-29 00:39:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 282 flow [2023-11-29 00:39:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2023-11-29 00:39:24,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2023-11-29 00:39:24,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 141 transitions. [2023-11-29 00:39:24,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 141 transitions. [2023-11-29 00:39:24,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:24,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 141 transitions. [2023-11-29 00:39:24,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:24,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:24,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:24,467 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 158 flow. Second operand 3 states and 141 transitions. [2023-11-29 00:39:24,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 282 flow [2023-11-29 00:39:24,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:39:24,473 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 168 flow [2023-11-29 00:39:24,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2023-11-29 00:39:24,474 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-29 00:39:24,474 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 168 flow [2023-11-29 00:39:24,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:39:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:39:24,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:39:24,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash 751084544, now seen corresponding path program 1 times [2023-11-29 00:39:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910385358] [2023-11-29 00:39:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910385358] [2023-11-29 00:39:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910385358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:24,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855144123] [2023-11-29 00:39:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:24,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:24,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:39:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:24,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:39:24,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:24,723 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 [2023-11-29 00:39:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:24,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855144123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:24,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 00:39:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815820906] [2023-11-29 00:39:24,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:39:24,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:39:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:39:24,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 87 [2023-11-29 00:39:24,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 168 flow. Second operand has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:24,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:24,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 87 [2023-11-29 00:39:24,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:25,184 INFO L124 PetriNetUnfolderBase]: 528/1055 cut-off events. [2023-11-29 00:39:25,184 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-11-29 00:39:25,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 1055 events. 528/1055 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6225 event pairs, 77 based on Foata normal form. 180/1219 useless extension candidates. Maximal degree in co-relation 1776. Up to 675 conditions per place. [2023-11-29 00:39:25,191 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 48 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-11-29 00:39:25,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 252 flow [2023-11-29 00:39:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2023-11-29 00:39:25,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2023-11-29 00:39:25,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 195 transitions. [2023-11-29 00:39:25,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 195 transitions. [2023-11-29 00:39:25,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:25,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 195 transitions. [2023-11-29 00:39:25,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,196 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 168 flow. Second operand 5 states and 195 transitions. [2023-11-29 00:39:25,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 252 flow [2023-11-29 00:39:25,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:25,199 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 98 flow [2023-11-29 00:39:25,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-11-29 00:39:25,199 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -26 predicate places. [2023-11-29 00:39:25,200 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 98 flow [2023-11-29 00:39:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.333333333333332) internal successors, (273), 9 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:25,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:25,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:39:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:39:25,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:39:25,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash 981045926, now seen corresponding path program 1 times [2023-11-29 00:39:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:25,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499284962] [2023-11-29 00:39:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499284962] [2023-11-29 00:39:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499284962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:25,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:25,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684403825] [2023-11-29 00:39:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:25,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:39:25,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:39:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:39:25,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2023-11-29 00:39:25,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:25,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2023-11-29 00:39:25,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:25,574 INFO L124 PetriNetUnfolderBase]: 376/792 cut-off events. [2023-11-29 00:39:25,574 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2023-11-29 00:39:25,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 792 events. 376/792 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4177 event pairs, 286 based on Foata normal form. 0/776 useless extension candidates. Maximal degree in co-relation 1121. Up to 498 conditions per place. [2023-11-29 00:39:25,579 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-11-29 00:39:25,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 197 flow [2023-11-29 00:39:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:39:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:39:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2023-11-29 00:39:25,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281609195402299 [2023-11-29 00:39:25,581 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 149 transitions. [2023-11-29 00:39:25,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 149 transitions. [2023-11-29 00:39:25,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:25,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 149 transitions. [2023-11-29 00:39:25,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,583 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,583 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 98 flow. Second operand 4 states and 149 transitions. [2023-11-29 00:39:25,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 197 flow [2023-11-29 00:39:25,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 186 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:25,586 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 91 flow [2023-11-29 00:39:25,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-29 00:39:25,586 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -29 predicate places. [2023-11-29 00:39:25,587 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 91 flow [2023-11-29 00:39:25,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:25,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 00:39:25,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:39:25,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-29 00:39:25,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 623346897, now seen corresponding path program 1 times [2023-11-29 00:39:25,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:25,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071604343] [2023-11-29 00:39:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:25,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:39:25,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:39:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:39:25,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:39:25,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:39:25,619 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-29 00:39:25,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-29 00:39:25,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-29 00:39:25,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-29 00:39:25,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-29 00:39:25,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-29 00:39:25,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-29 00:39:25,620 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-29 00:39:25,621 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-29 00:39:25,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:39:25,621 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 00:39:25,622 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:39:25,622 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 00:39:25,645 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:39:25,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 109 transitions, 245 flow [2023-11-29 00:39:25,667 INFO L124 PetriNetUnfolderBase]: 52/271 cut-off events. [2023-11-29 00:39:25,667 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-29 00:39:25,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 271 events. 52/271 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1256 event pairs, 1 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 188. Up to 12 conditions per place. [2023-11-29 00:39:25,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 109 transitions, 245 flow [2023-11-29 00:39:25,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 109 transitions, 245 flow [2023-11-29 00:39:25,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:39:25,673 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ae86a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:39:25,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-29 00:39:25,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:39:25,674 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:39:25,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:39:25,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:25,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:25,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:39:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 625254, now seen corresponding path program 1 times [2023-11-29 00:39:25,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880558022] [2023-11-29 00:39:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:25,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:25,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880558022] [2023-11-29 00:39:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880558022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:25,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250632618] [2023-11-29 00:39:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:25,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:25,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 109 [2023-11-29 00:39:25,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:25,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:25,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 109 [2023-11-29 00:39:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:31,442 INFO L124 PetriNetUnfolderBase]: 44624/74164 cut-off events. [2023-11-29 00:39:31,442 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2023-11-29 00:39:31,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136836 conditions, 74164 events. 44624/74164 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 2207. Compared 671551 event pairs, 38073 based on Foata normal form. 18973/89420 useless extension candidates. Maximal degree in co-relation 42401. Up to 55214 conditions per place. [2023-11-29 00:39:31,798 INFO L140 encePairwiseOnDemand]: 87/109 looper letters, 75 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-11-29 00:39:31,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 401 flow [2023-11-29 00:39:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-29 00:39:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636085626911315 [2023-11-29 00:39:31,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-29 00:39:31,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-29 00:39:31,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:31,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-29 00:39:31,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:31,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:31,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:31,803 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 245 flow. Second operand 3 states and 208 transitions. [2023-11-29 00:39:31,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 401 flow [2023-11-29 00:39:31,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 401 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:39:31,808 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 203 flow [2023-11-29 00:39:31,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2023-11-29 00:39:31,809 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -3 predicate places. [2023-11-29 00:39:31,810 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 203 flow [2023-11-29 00:39:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:31,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:31,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:39:31,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:39:31,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:39:31,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash 625255, now seen corresponding path program 1 times [2023-11-29 00:39:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:31,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33384945] [2023-11-29 00:39:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33384945] [2023-11-29 00:39:31,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33384945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:31,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:31,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:39:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7032562] [2023-11-29 00:39:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:31,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:31,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:31,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:31,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:31,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2023-11-29 00:39:31,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:31,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:31,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2023-11-29 00:39:31,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:37,039 INFO L124 PetriNetUnfolderBase]: 42221/71131 cut-off events. [2023-11-29 00:39:37,039 INFO L125 PetriNetUnfolderBase]: For 2055/2065 co-relation queries the response was YES. [2023-11-29 00:39:37,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131389 conditions, 71131 events. 42221/71131 cut-off events. For 2055/2065 co-relation queries the response was YES. Maximal size of possible extension queue 2096. Compared 648092 event pairs, 26281 based on Foata normal form. 1/67430 useless extension candidates. Maximal degree in co-relation 115412. Up to 58588 conditions per place. [2023-11-29 00:39:37,380 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 60 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-11-29 00:39:37,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 347 flow [2023-11-29 00:39:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-29 00:39:37,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259938837920489 [2023-11-29 00:39:37,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-29 00:39:37,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-29 00:39:37,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:37,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-29 00:39:37,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:37,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:37,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:37,384 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 203 flow. Second operand 3 states and 172 transitions. [2023-11-29 00:39:37,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 347 flow [2023-11-29 00:39:37,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 343 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:39:37,475 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 213 flow [2023-11-29 00:39:37,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2023-11-29 00:39:37,476 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, -2 predicate places. [2023-11-29 00:39:37,476 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 213 flow [2023-11-29 00:39:37,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:37,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:37,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:39:37,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:39:37,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:39:37,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:37,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1929930489, now seen corresponding path program 1 times [2023-11-29 00:39:37,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:37,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258545300] [2023-11-29 00:39:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:37,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:37,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:37,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258545300] [2023-11-29 00:39:37,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258545300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:37,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212872435] [2023-11-29 00:39:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:37,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:37,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:37,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:37,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:39:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:37,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:39:37,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:37,674 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 [2023-11-29 00:39:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:37,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212872435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:37,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:37,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-29 00:39:37,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046896808] [2023-11-29 00:39:37,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:37,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:39:37,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:39:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:39:37,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 109 [2023-11-29 00:39:37,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 213 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:37,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:37,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 109 [2023-11-29 00:39:37,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:42,738 INFO L124 PetriNetUnfolderBase]: 42098/70065 cut-off events. [2023-11-29 00:39:42,738 INFO L125 PetriNetUnfolderBase]: For 3534/3534 co-relation queries the response was YES. [2023-11-29 00:39:42,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130732 conditions, 70065 events. 42098/70065 cut-off events. For 3534/3534 co-relation queries the response was YES. Maximal size of possible extension queue 2053. Compared 636367 event pairs, 1221 based on Foata normal form. 828/68095 useless extension candidates. Maximal degree in co-relation 116042. Up to 47434 conditions per place. [2023-11-29 00:39:43,101 INFO L140 encePairwiseOnDemand]: 105/109 looper letters, 127 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2023-11-29 00:39:43,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 166 transitions, 639 flow [2023-11-29 00:39:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:39:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:39:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 347 transitions. [2023-11-29 00:39:43,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305810397553516 [2023-11-29 00:39:43,103 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 347 transitions. [2023-11-29 00:39:43,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 347 transitions. [2023-11-29 00:39:43,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:43,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 347 transitions. [2023-11-29 00:39:43,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:43,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:43,107 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:43,107 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 213 flow. Second operand 6 states and 347 transitions. [2023-11-29 00:39:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 166 transitions, 639 flow [2023-11-29 00:39:43,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 166 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:43,112 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 227 flow [2023-11-29 00:39:43,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=227, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2023-11-29 00:39:43,113 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2023-11-29 00:39:43,113 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 227 flow [2023-11-29 00:39:43,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:43,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:43,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:43,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:39:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89e57105-ae52-49ba-859c-728c432a9825/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:39:43,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:39:43,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash -418804614, now seen corresponding path program 1 times [2023-11-29 00:39:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:43,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889347794] [2023-11-29 00:39:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889347794] [2023-11-29 00:39:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889347794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:43,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:43,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26938728] [2023-11-29 00:39:43,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:39:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:39:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:39:43,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 109 [2023-11-29 00:39:43,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:43,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:43,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 109 [2023-11-29 00:39:43,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:51,987 INFO L124 PetriNetUnfolderBase]: 68744/113411 cut-off events. [2023-11-29 00:39:51,987 INFO L125 PetriNetUnfolderBase]: For 6982/7008 co-relation queries the response was YES. [2023-11-29 00:39:52,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212794 conditions, 113411 events. 68744/113411 cut-off events. For 6982/7008 co-relation queries the response was YES. Maximal size of possible extension queue 2175. Compared 1025940 event pairs, 22552 based on Foata normal form. 0/106046 useless extension candidates. Maximal degree in co-relation 120544. Up to 47254 conditions per place. [2023-11-29 00:39:52,486 INFO L140 encePairwiseOnDemand]: 103/109 looper letters, 159 selfloop transitions, 7 changer transitions 0/199 dead transitions. [2023-11-29 00:39:52,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 199 transitions, 834 flow [2023-11-29 00:39:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:39:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:39:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2023-11-29 00:39:52,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275229357798165 [2023-11-29 00:39:52,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2023-11-29 00:39:52,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2023-11-29 00:39:52,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:52,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2023-11-29 00:39:52,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.4) internal successors, (342), 5 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,490 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 227 flow. Second operand 5 states and 342 transitions. [2023-11-29 00:39:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 199 transitions, 834 flow [2023-11-29 00:39:52,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 199 transitions, 807 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:52,498 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 262 flow [2023-11-29 00:39:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2023-11-29 00:39:52,499 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 6 predicate places. [2023-11-29 00:39:52,499 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 262 flow [2023-11-29 00:39:52,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:52,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:52,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:39:52,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:39:52,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1762125670, now seen corresponding path program 1 times [2023-11-29 00:39:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:52,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380779843] [2023-11-29 00:39:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:39:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:52,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380779843] [2023-11-29 00:39:52,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380779843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:52,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:52,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:52,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556221508] [2023-11-29 00:39:52,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:52,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:52,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:52,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:52,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:52,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 109 [2023-11-29 00:39:52,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:52,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 109 [2023-11-29 00:39:52,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:03,737 INFO L124 PetriNetUnfolderBase]: 89926/149302 cut-off events. [2023-11-29 00:40:03,737 INFO L125 PetriNetUnfolderBase]: For 35309/37442 co-relation queries the response was YES. [2023-11-29 00:40:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302022 conditions, 149302 events. 89926/149302 cut-off events. For 35309/37442 co-relation queries the response was YES. Maximal size of possible extension queue 3410. Compared 1436613 event pairs, 55664 based on Foata normal form. 0/143044 useless extension candidates. Maximal degree in co-relation 248735. Up to 86569 conditions per place. [2023-11-29 00:40:04,410 INFO L140 encePairwiseOnDemand]: 106/109 looper letters, 95 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2023-11-29 00:40:04,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 564 flow [2023-11-29 00:40:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:40:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:40:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-29 00:40:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6116207951070336 [2023-11-29 00:40:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-29 00:40:04,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-29 00:40:04,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:04,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-29 00:40:04,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,413 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 262 flow. Second operand 3 states and 200 transitions. [2023-11-29 00:40:04,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 564 flow [2023-11-29 00:40:04,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 133 transitions, 564 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:40:04,474 INFO L231 Difference]: Finished difference. Result has 102 places, 94 transitions, 277 flow [2023-11-29 00:40:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=102, PETRI_TRANSITIONS=94} [2023-11-29 00:40:04,475 INFO L281 CegarLoopForPetriNet]: 93 programPoint places, 9 predicate places. [2023-11-29 00:40:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 94 transitions, 277 flow [2023-11-29 00:40:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:04,476 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 00:40:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:40:04,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-29 00:40:04,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 458125053, now seen corresponding path program 1 times [2023-11-29 00:40:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880387149] [2023-11-29 00:40:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:40:04,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:40:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:40:04,510 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:40:04,510 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-29 00:40:04,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-29 00:40:04,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-29 00:40:04,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-29 00:40:04,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-29 00:40:04,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 00:40:04,512 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 00:40:04,513 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:40:04,513 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 00:40:04,539 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 00:40:04,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 131 transitions, 302 flow [2023-11-29 00:40:04,580 INFO L124 PetriNetUnfolderBase]: 77/409 cut-off events. [2023-11-29 00:40:04,580 INFO L125 PetriNetUnfolderBase]: For 48/51 co-relation queries the response was YES. [2023-11-29 00:40:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 409 events. 77/409 cut-off events. For 48/51 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2083 event pairs, 6 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 295. Up to 32 conditions per place. [2023-11-29 00:40:04,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 131 transitions, 302 flow [2023-11-29 00:40:04,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 131 transitions, 302 flow [2023-11-29 00:40:04,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:40:04,588 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ae86a57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:40:04,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-29 00:40:04,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:40:04,589 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:40:04,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:40:04,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:04,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:40:04,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:40:04,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash 755337, now seen corresponding path program 1 times [2023-11-29 00:40:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060677870] [2023-11-29 00:40:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060677870] [2023-11-29 00:40:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060677870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:04,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:04,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:40:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912660468] [2023-11-29 00:40:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:40:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:40:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:40:04,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 131 [2023-11-29 00:40:04,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:04,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 131 [2023-11-29 00:40:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand