./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_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_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme --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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:48,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:43:48,370 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:43:48,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:43:48,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:43:48,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:43:48,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:43:48,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:43:48,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:43:48,406 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:43:48,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:43:48,408 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:43:48,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:43:48,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:43:48,410 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:43:48,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:43:48,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:43:48,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:43:48,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:43:48,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:43:48,413 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:43:48,417 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:43:48,418 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:43:48,418 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:43:48,419 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:43:48,419 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:43:48,419 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:43:48,420 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:43:48,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:43:48,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:43:48,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:43:48,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:43:48,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:48,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:43:48,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:43:48,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:43:48,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:43:48,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:43:48,425 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:43:48,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:43:48,426 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:43:48,427 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_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2023-11-26 10:43:48,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:43:48,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:43:48,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:43:48,715 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:43:48,716 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:43:48,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-26 10:43:51,909 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:43:52,227 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:43:52,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-26 10:43:52,250 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/data/7044a78e1/f9aba6d32f144d8db78f6db3c8a7ee3a/FLAG3719356db [2023-11-26 10:43:52,268 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/data/7044a78e1/f9aba6d32f144d8db78f6db3c8a7ee3a [2023-11-26 10:43:52,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:43:52,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:43:52,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:52,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:43:52,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:43:52,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:52,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351b1347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52, skipping insertion in model container [2023-11-26 10:43:52,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:52,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:43:52,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:52,844 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:43:52,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:43:52,948 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:43:52,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52 WrapperNode [2023-11-26 10:43:52,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:43:52,952 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:52,952 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:43:52,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:43:52,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:52,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,021 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-11-26 10:43:53,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:43:53,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:43:53,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:43:53,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:43:53,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,070 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 2, 5, 10]. 53 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 0, 5, 10]. The 1 writes are split as follows [0, 1, 0, 0]. [2023-11-26 10:43:53,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,093 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:43:53,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:43:53,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:43:53,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:43:53,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (1/1) ... [2023-11-26 10:43:53,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:53,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:43:53,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:43:53,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:43:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:43:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:43:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:43:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:43:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:43:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:43:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:43:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:43:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:43:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:43:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 10:43:53,207 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 10:43:53,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:43:53,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:43:53,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:43:53,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:43:53,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:43:53,208 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:43:53,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:43:53,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:43:53,213 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:43:53,372 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:43:53,374 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:43:53,671 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:43:53,929 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:43:53,929 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-26 10:43:53,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:53 BoogieIcfgContainer [2023-11-26 10:43:53,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:43:53,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:43:53,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:43:53,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:43:53,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:43:52" (1/3) ... [2023-11-26 10:43:53,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a15b878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:53, skipping insertion in model container [2023-11-26 10:43:53,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:43:52" (2/3) ... [2023-11-26 10:43:53,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a15b878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:43:53, skipping insertion in model container [2023-11-26 10:43:53,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:43:53" (3/3) ... [2023-11-26 10:43:53,940 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-26 10:43:53,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:43:53,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-26 10:43:53,956 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:43:54,007 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 10:43:54,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 60 transitions, 127 flow [2023-11-26 10:43:54,112 INFO L124 PetriNetUnfolderBase]: 15/91 cut-off events. [2023-11-26 10:43:54,112 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:43:54,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 15/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 341 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-26 10:43:54,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 60 transitions, 127 flow [2023-11-26 10:43:54,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 60 transitions, 127 flow [2023-11-26 10:43:54,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:54,145 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;@4738911f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:54,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 10:43:54,152 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:43:54,152 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:43:54,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:43:54,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:54,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:43:54,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:54,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash 372668, now seen corresponding path program 1 times [2023-11-26 10:43:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:54,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522063219] [2023-11-26 10:43:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:54,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522063219] [2023-11-26 10:43:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522063219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:54,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724372676] [2023-11-26 10:43:54,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:54,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:54,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2023-11-26 10:43:54,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 127 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) [2023-11-26 10:43:54,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:54,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2023-11-26 10:43:54,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:54,786 INFO L124 PetriNetUnfolderBase]: 136/437 cut-off events. [2023-11-26 10:43:54,787 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:43:54,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 437 events. 136/437 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2195 event pairs, 117 based on Foata normal form. 94/512 useless extension candidates. Maximal degree in co-relation 700. Up to 272 conditions per place. [2023-11-26 10:43:54,794 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 34 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2023-11-26 10:43:54,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 193 flow [2023-11-26 10:43:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 10:43:54,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2023-11-26 10:43:54,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 10:43:54,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 10:43:54,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:54,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 10:43:54,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:54,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:54,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:54,834 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 127 flow. Second operand 3 states and 112 transitions. [2023-11-26 10:43:54,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 193 flow [2023-11-26 10:43:54,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:43:54,846 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 103 flow [2023-11-26 10:43:54,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 10:43:54,854 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-26 10:43:54,854 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 103 flow [2023-11-26 10:43:54,855 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) [2023-11-26 10:43:54,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:54,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:43:54,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:43:54,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:54,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 372669, now seen corresponding path program 1 times [2023-11-26 10:43:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:54,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589490046] [2023-11-26 10:43:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:55,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589490046] [2023-11-26 10:43:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589490046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:55,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713597297] [2023-11-26 10:43:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:55,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:55,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2023-11-26 10:43:55,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 103 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) [2023-11-26 10:43:55,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:55,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2023-11-26 10:43:55,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:55,247 INFO L124 PetriNetUnfolderBase]: 117/394 cut-off events. [2023-11-26 10:43:55,248 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-26 10:43:55,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 394 events. 117/394 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1932 event pairs, 96 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 646. Up to 251 conditions per place. [2023-11-26 10:43:55,252 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-26 10:43:55,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 195 flow [2023-11-26 10:43:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2023-11-26 10:43:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-11-26 10:43:55,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2023-11-26 10:43:55,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2023-11-26 10:43:55,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:55,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2023-11-26 10:43:55,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:55,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:55,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:55,258 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 103 flow. Second operand 3 states and 104 transitions. [2023-11-26 10:43:55,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 195 flow [2023-11-26 10:43:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:55,263 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 109 flow [2023-11-26 10:43:55,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 10:43:55,264 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-26 10:43:55,264 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 109 flow [2023-11-26 10:43:55,265 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) [2023-11-26 10:43:55,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:55,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:43:55,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:43:55,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:55,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 580570395, now seen corresponding path program 1 times [2023-11-26 10:43:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:55,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884904683] [2023-11-26 10:43:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:55,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:55,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:55,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884904683] [2023-11-26 10:43:55,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884904683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:55,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267962738] [2023-11-26 10:43:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:55,568 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:55,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:55,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:43:55,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:55,759 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 [2023-11-26 10:43:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:55,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:55,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267962738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:55,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:55,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 10:43:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771722872] [2023-11-26 10:43:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:55,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:43:55,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:43:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:43:56,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2023-11-26 10:43:56,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 109 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) [2023-11-26 10:43:56,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:56,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2023-11-26 10:43:56,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:56,135 INFO L124 PetriNetUnfolderBase]: 27/96 cut-off events. [2023-11-26 10:43:56,135 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-26 10:43:56,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 96 events. 27/96 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 16 based on Foata normal form. 20/115 useless extension candidates. Maximal degree in co-relation 175. Up to 57 conditions per place. [2023-11-26 10:43:56,137 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-26 10:43:56,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2023-11-26 10:43:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:43:56,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:43:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-26 10:43:56,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-11-26 10:43:56,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-26 10:43:56,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-26 10:43:56,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:56,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-26 10:43:56,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 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) [2023-11-26 10:43:56,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:56,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:56,143 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 109 flow. Second operand 4 states and 111 transitions. [2023-11-26 10:43:56,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2023-11-26 10:43:56,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:43:56,145 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2023-11-26 10:43:56,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-26 10:43:56,146 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -23 predicate places. [2023-11-26 10:43:56,147 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2023-11-26 10:43:56,147 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) [2023-11-26 10:43:56,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:56,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-26 10:43:56,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:56,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:56,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash 817813394, now seen corresponding path program 1 times [2023-11-26 10:43:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:56,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445566678] [2023-11-26 10:43:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:43:56,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:43:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:43:56,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:43:56,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:43:56,430 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 10:43:56,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 10:43:56,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 10:43:56,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 10:43:56,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 10:43:56,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 10:43:56,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 10:43:56,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:43:56,435 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:43:56,438 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:43:56,438 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 10:43:56,467 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:43:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 85 transitions, 186 flow [2023-11-26 10:43:56,494 INFO L124 PetriNetUnfolderBase]: 27/159 cut-off events. [2023-11-26 10:43:56,494 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:43:56,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 159 events. 27/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 672 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2023-11-26 10:43:56,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 85 transitions, 186 flow [2023-11-26 10:43:56,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 85 transitions, 186 flow [2023-11-26 10:43:56,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:43:56,505 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;@4738911f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:43:56,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 10:43:56,507 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:43:56,507 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:43:56,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:43:56,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:56,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:43:56,508 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:56,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:56,509 INFO L85 PathProgramCache]: Analyzing trace with hash 457073, now seen corresponding path program 1 times [2023-11-26 10:43:56,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:56,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070532490] [2023-11-26 10:43:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:56,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:56,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:56,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070532490] [2023-11-26 10:43:56,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070532490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:56,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:56,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96522676] [2023-11-26 10:43:56,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:56,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:56,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:56,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 85 [2023-11-26 10:43:56,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:56,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:56,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 85 [2023-11-26 10:43:56,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:57,737 INFO L124 PetriNetUnfolderBase]: 2991/6066 cut-off events. [2023-11-26 10:43:57,738 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-26 10:43:57,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10951 conditions, 6066 events. 2991/6066 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 46118 event pairs, 2583 based on Foata normal form. 1632/7435 useless extension candidates. Maximal degree in co-relation 8032. Up to 4189 conditions per place. [2023-11-26 10:43:57,790 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 54 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2023-11-26 10:43:57,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 298 flow [2023-11-26 10:43:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-26 10:43:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2023-11-26 10:43:57,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-26 10:43:57,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-26 10:43:57,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:57,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-26 10:43:57,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:57,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:57,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:57,801 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 186 flow. Second operand 3 states and 168 transitions. [2023-11-26 10:43:57,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 298 flow [2023-11-26 10:43:57,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:43:57,806 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 150 flow [2023-11-26 10:43:57,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-11-26 10:43:57,809 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-26 10:43:57,809 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 150 flow [2023-11-26 10:43:57,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:57,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:57,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:43:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:43:57,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 457074, now seen corresponding path program 1 times [2023-11-26 10:43:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:57,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103295257] [2023-11-26 10:43:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:57,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:57,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103295257] [2023-11-26 10:43:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103295257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:57,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:43:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102604284] [2023-11-26 10:43:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:43:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:43:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:43:57,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 85 [2023-11-26 10:43:57,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:57,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:57,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 85 [2023-11-26 10:43:57,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:58,876 INFO L124 PetriNetUnfolderBase]: 2594/5471 cut-off events. [2023-11-26 10:43:58,876 INFO L125 PetriNetUnfolderBase]: For 135/143 co-relation queries the response was YES. [2023-11-26 10:43:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 5471 events. 2594/5471 cut-off events. For 135/143 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41920 event pairs, 2574 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 9025. Up to 4168 conditions per place. [2023-11-26 10:43:58,933 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 46 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-26 10:43:58,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 268 flow [2023-11-26 10:43:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:43:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:43:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-26 10:43:58,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-11-26 10:43:58,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-26 10:43:58,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-26 10:43:58,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:58,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-26 10:43:58,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:58,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:58,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:58,942 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 150 flow. Second operand 3 states and 140 transitions. [2023-11-26 10:43:58,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 268 flow [2023-11-26 10:43:58,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:58,959 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 160 flow [2023-11-26 10:43:58,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-11-26 10:43:58,961 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-26 10:43:58,962 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 160 flow [2023-11-26 10:43:58,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:58,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:58,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:43:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:43:58,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:43:58,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1224250905, now seen corresponding path program 1 times [2023-11-26 10:43:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877403125] [2023-11-26 10:43:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877403125] [2023-11-26 10:43:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877403125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396452224] [2023-11-26 10:43:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:59,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:59,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:59,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:43:59,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:59,262 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 [2023-11-26 10:43:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:59,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:59,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396452224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:59,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:59,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-26 10:43:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372125871] [2023-11-26 10:43:59,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:59,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:43:59,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:59,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:43:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:43:59,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2023-11-26 10:43:59,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:43:59,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:59,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2023-11-26 10:43:59,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:00,418 INFO L124 PetriNetUnfolderBase]: 2512/5370 cut-off events. [2023-11-26 10:44:00,419 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2023-11-26 10:44:00,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9669 conditions, 5370 events. 2512/5370 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 42313 event pairs, 161 based on Foata normal form. 120/5335 useless extension candidates. Maximal degree in co-relation 973. Up to 2919 conditions per place. [2023-11-26 10:44:00,518 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 83 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-11-26 10:44:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 114 transitions, 428 flow [2023-11-26 10:44:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2023-11-26 10:44:00,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2023-11-26 10:44:00,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 235 transitions. [2023-11-26 10:44:00,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 235 transitions. [2023-11-26 10:44:00,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:00,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 235 transitions. [2023-11-26 10:44:00,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:00,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:00,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:00,525 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 160 flow. Second operand 5 states and 235 transitions. [2023-11-26 10:44:00,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 114 transitions, 428 flow [2023-11-26 10:44:00,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:00,530 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 162 flow [2023-11-26 10:44:00,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-11-26 10:44:00,531 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-26 10:44:00,532 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 162 flow [2023-11-26 10:44:00,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:00,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:00,532 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-26 10:44:00,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:44:00,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:00,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash -858686982, now seen corresponding path program 1 times [2023-11-26 10:44:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:00,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685478597] [2023-11-26 10:44:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:00,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:00,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:00,788 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:00,789 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 10:44:00,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 10:44:00,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 10:44:00,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 10:44:00,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 10:44:00,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 10:44:00,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 10:44:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:44:00,791 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:44:00,792 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:44:00,792 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-26 10:44:00,823 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:44:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 110 transitions, 247 flow [2023-11-26 10:44:00,854 INFO L124 PetriNetUnfolderBase]: 42/248 cut-off events. [2023-11-26 10:44:00,855 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 10:44:00,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 248 events. 42/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1118 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2023-11-26 10:44:00,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 110 transitions, 247 flow [2023-11-26 10:44:00,859 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 110 transitions, 247 flow [2023-11-26 10:44:00,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:00,861 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;@4738911f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:00,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 10:44:00,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:00,864 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:44:00,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:00,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:00,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:00,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:00,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash 566303, now seen corresponding path program 1 times [2023-11-26 10:44:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301231788] [2023-11-26 10:44:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301231788] [2023-11-26 10:44:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301231788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:00,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403177722] [2023-11-26 10:44:00,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:00,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:00,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 110 [2023-11-26 10:44:00,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:00,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:00,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 110 [2023-11-26 10:44:00,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:10,826 INFO L124 PetriNetUnfolderBase]: 47447/78707 cut-off events. [2023-11-26 10:44:10,826 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2023-11-26 10:44:10,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145940 conditions, 78707 events. 47447/78707 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2012. Compared 706989 event pairs, 40780 based on Foata normal form. 23856/99465 useless extension candidates. Maximal degree in co-relation 53254. Up to 57237 conditions per place. [2023-11-26 10:44:11,406 INFO L140 encePairwiseOnDemand]: 84/110 looper letters, 74 selfloop transitions, 2 changer transitions 1/112 dead transitions. [2023-11-26 10:44:11,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 405 flow [2023-11-26 10:44:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-11-26 10:44:11,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2023-11-26 10:44:11,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-11-26 10:44:11,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-11-26 10:44:11,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:11,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-11-26 10:44:11,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:11,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:11,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:11,415 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 247 flow. Second operand 3 states and 224 transitions. [2023-11-26 10:44:11,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 405 flow [2023-11-26 10:44:11,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 112 transitions, 405 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:11,424 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 199 flow [2023-11-26 10:44:11,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-11-26 10:44:11,426 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2023-11-26 10:44:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 199 flow [2023-11-26 10:44:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:11,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:11,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:11,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:44:11,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:11,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:11,428 INFO L85 PathProgramCache]: Analyzing trace with hash 566304, now seen corresponding path program 1 times [2023-11-26 10:44:11,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:11,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320615420] [2023-11-26 10:44:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:11,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:11,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320615420] [2023-11-26 10:44:11,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320615420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:11,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:11,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362523181] [2023-11-26 10:44:11,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:11,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:11,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 110 [2023-11-26 10:44:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 110 [2023-11-26 10:44:11,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:18,644 INFO L124 PetriNetUnfolderBase]: 40912/69720 cut-off events. [2023-11-26 10:44:18,645 INFO L125 PetriNetUnfolderBase]: For 2450/2450 co-relation queries the response was YES. [2023-11-26 10:44:18,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129080 conditions, 69720 events. 40912/69720 cut-off events. For 2450/2450 co-relation queries the response was YES. Maximal size of possible extension queue 1875. Compared 636705 event pairs, 26434 based on Foata normal form. 1/66891 useless extension candidates. Maximal degree in co-relation 117413. Up to 57216 conditions per place. [2023-11-26 10:44:19,117 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 57 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-26 10:44:19,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 339 flow [2023-11-26 10:44:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-26 10:44:19,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2023-11-26 10:44:19,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-26 10:44:19,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-26 10:44:19,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:19,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-26 10:44:19,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:19,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:19,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:19,124 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 199 flow. Second operand 3 states and 175 transitions. [2023-11-26 10:44:19,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 339 flow [2023-11-26 10:44:19,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:19,468 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 209 flow [2023-11-26 10:44:19,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-11-26 10:44:19,471 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2023-11-26 10:44:19,471 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 209 flow [2023-11-26 10:44:19,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:19,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:19,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:44:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:44:19,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:19,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -974693936, now seen corresponding path program 1 times [2023-11-26 10:44:19,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859322393] [2023-11-26 10:44:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859322393] [2023-11-26 10:44:19,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859322393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078995536] [2023-11-26 10:44:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:19,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:44:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:19,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:44:19,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:19,745 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 [2023-11-26 10:44:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:19,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078995536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:19,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:19,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 10:44:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214751168] [2023-11-26 10:44:19,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:19,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:44:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:44:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:19,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2023-11-26 10:44:19,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 209 flow. Second operand has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2023-11-26 10:44:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:21,998 INFO L124 PetriNetUnfolderBase]: 10557/18198 cut-off events. [2023-11-26 10:44:21,998 INFO L125 PetriNetUnfolderBase]: For 4469/4469 co-relation queries the response was YES. [2023-11-26 10:44:22,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34758 conditions, 18198 events. 10557/18198 cut-off events. For 4469/4469 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 140957 event pairs, 2880 based on Foata normal form. 2220/20174 useless extension candidates. Maximal degree in co-relation 3559. Up to 11100 conditions per place. [2023-11-26 10:44:22,079 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2023-11-26 10:44:22,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 462 flow [2023-11-26 10:44:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:44:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:44:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2023-11-26 10:44:22,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-26 10:44:22,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 324 transitions. [2023-11-26 10:44:22,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 324 transitions. [2023-11-26 10:44:22,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:22,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 324 transitions. [2023-11-26 10:44:22,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:22,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:22,088 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:22,088 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 209 flow. Second operand 6 states and 324 transitions. [2023-11-26 10:44:22,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 462 flow [2023-11-26 10:44:22,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:22,094 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 154 flow [2023-11-26 10:44:22,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-26 10:44:22,095 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -19 predicate places. [2023-11-26 10:44:22,095 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 154 flow [2023-11-26 10:44:22,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.333333333333336) internal successors, (354), 9 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:22,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:22,096 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-26 10:44:22,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:22,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888c26a-21a6-476b-a760-7e9c363a64b8/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 10:44:22,303 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:22,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1658943215, now seen corresponding path program 1 times [2023-11-26 10:44:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991935774] [2023-11-26 10:44:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:22,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:22,381 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:22,381 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:22,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 10:44:22,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 10:44:22,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 10:44:22,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 10:44:22,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 10:44:22,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 10:44:22,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 10:44:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:44:22,383 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:44:22,385 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:44:22,385 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-26 10:44:22,428 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 10:44:22,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 135 transitions, 310 flow [2023-11-26 10:44:22,486 INFO L124 PetriNetUnfolderBase]: 65/381 cut-off events. [2023-11-26 10:44:22,487 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-26 10:44:22,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 381 events. 65/381 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1890 event pairs, 6 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 272. Up to 32 conditions per place. [2023-11-26 10:44:22,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 135 transitions, 310 flow [2023-11-26 10:44:22,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 135 transitions, 310 flow [2023-11-26 10:44:22,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:22,498 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;@4738911f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:22,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 10:44:22,500 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:22,501 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:44:22,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:22,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:44:22,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash 700358, now seen corresponding path program 1 times [2023-11-26 10:44:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779578199] [2023-11-26 10:44:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:44:22,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:22,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779578199] [2023-11-26 10:44:22,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779578199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:22,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592397503] [2023-11-26 10:44:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:22,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:22,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 135 [2023-11-26 10:44:22,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:44:22,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 135 [2023-11-26 10:44:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand