./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI --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 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:18,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:18,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:55:18,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:18,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:18,227 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:18,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:18,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:18,231 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:18,237 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:18,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:18,239 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:18,240 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:18,242 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:18,242 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:18,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:18,243 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:18,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:18,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:18,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:18,246 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:18,246 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:18,247 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:18,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:18,248 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:18,248 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:18,249 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:18,249 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:18,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:18,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:18,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:18,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:18,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:18,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:18,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:18,272 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:55:18,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:55:18,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:18,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:18,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:18,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:18,274 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_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 [2023-11-24 21:55:18,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:18,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:18,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:18,686 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:18,686 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:18,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i [2023-11-24 21:55:21,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:22,170 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:22,171 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i [2023-11-24 21:55:22,200 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/22d862d1d/089df29a61d340c9b34978d08a191d13/FLAGa485491f1 [2023-11-24 21:55:22,219 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/22d862d1d/089df29a61d340c9b34978d08a191d13 [2023-11-24 21:55:22,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:22,228 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:22,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:22,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:22,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:22,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:22" (1/1) ... [2023-11-24 21:55:22,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75ee5f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:22, skipping insertion in model container [2023-11-24 21:55:22,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:22" (1/1) ... [2023-11-24 21:55:22,348 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:23,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:23,034 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:23,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:23,209 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:23,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23 WrapperNode [2023-11-24 21:55:23,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:23,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:23,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:23,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:23,222 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,306 INFO L138 Inliner]: procedures = 369, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 91 [2023-11-24 21:55:23,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:23,308 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:23,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:23,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:23,320 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,326 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,350 INFO L175 MemorySlicer]: Split 31 memory accesses to 4 slices as follows [5, 5, 1, 20]. 65 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [5, 5, 0, 0]. The 13 writes are split as follows [0, 0, 1, 12]. [2023-11-24 21:55:23,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,382 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:23,383 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:23,383 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:23,383 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:23,384 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (1/1) ... [2023-11-24 21:55:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:23,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:23,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:55:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:55:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:55:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:55:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:55:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:55:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:55:23,540 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:55:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:55:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:55:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:55:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:55:23,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:23,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:23,543 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:55:23,782 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:23,785 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:24,275 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:24,454 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:24,455 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:55:24,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:24 BoogieIcfgContainer [2023-11-24 21:55:24,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:24,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:24,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:24,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:24,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:22" (1/3) ... [2023-11-24 21:55:24,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de94cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:24, skipping insertion in model container [2023-11-24 21:55:24,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:23" (2/3) ... [2023-11-24 21:55:24,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de94cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:24, skipping insertion in model container [2023-11-24 21:55:24,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:24" (3/3) ... [2023-11-24 21:55:24,465 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2023-11-24 21:55:24,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:24,485 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-11-24 21:55:24,486 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:55:24,544 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:55:24,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 86 transitions, 176 flow [2023-11-24 21:55:24,644 INFO L124 PetriNetUnfolderBase]: 0/85 cut-off events. [2023-11-24 21:55:24,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:24,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-11-24 21:55:24,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 86 transitions, 176 flow [2023-11-24 21:55:24,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 173 flow [2023-11-24 21:55:24,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:24,694 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;@5a67c855, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:24,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-24 21:55:24,699 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:55:24,699 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:55:24,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:24,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:24,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:55:24,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:24,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash 11319, now seen corresponding path program 1 times [2023-11-24 21:55:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001893600] [2023-11-24 21:55:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001893600] [2023-11-24 21:55:25,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001893600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:25,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:25,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:25,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678130295] [2023-11-24 21:55:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:25,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:25,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:25,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:25,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 86 [2023-11-24 21:55:25,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 173 flow. Second operand has 3 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) [2023-11-24 21:55:25,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:25,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 86 [2023-11-24 21:55:25,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:25,460 INFO L124 PetriNetUnfolderBase]: 99/373 cut-off events. [2023-11-24 21:55:25,460 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:55:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 373 events. 99/373 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1841 event pairs, 99 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 564. Up to 223 conditions per place. [2023-11-24 21:55:25,468 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 28 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-24 21:55:25,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 221 flow [2023-11-24 21:55:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-24 21:55:25,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2023-11-24 21:55:25,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-24 21:55:25,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-24 21:55:25,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:25,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-24 21:55:25,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:25,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:25,507 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:25,509 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 173 flow. Second operand 3 states and 178 transitions. [2023-11-24 21:55:25,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 221 flow [2023-11-24 21:55:25,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:25,518 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 164 flow [2023-11-24 21:55:25,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-11-24 21:55:25,525 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2023-11-24 21:55:25,525 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 164 flow [2023-11-24 21:55:25,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:55:25,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:25,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:55:25,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:55:25,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:25,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash 11320, now seen corresponding path program 1 times [2023-11-24 21:55:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:25,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182768770] [2023-11-24 21:55:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:25,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:25,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182768770] [2023-11-24 21:55:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182768770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:25,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:25,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130543971] [2023-11-24 21:55:25,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:25,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:25,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:25,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 86 [2023-11-24 21:55:25,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:25,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:25,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 86 [2023-11-24 21:55:25,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:26,043 INFO L124 PetriNetUnfolderBase]: 99/365 cut-off events. [2023-11-24 21:55:26,044 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:55:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 365 events. 99/365 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1824 event pairs, 99 based on Foata normal form. 6/312 useless extension candidates. Maximal degree in co-relation 575. Up to 223 conditions per place. [2023-11-24 21:55:26,052 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 24 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-24 21:55:26,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 204 flow [2023-11-24 21:55:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-24 21:55:26,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7209302325581395 [2023-11-24 21:55:26,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-24 21:55:26,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-24 21:55:26,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:26,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-24 21:55:26,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,075 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 164 flow. Second operand 3 states and 186 transitions. [2023-11-24 21:55:26,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 204 flow [2023-11-24 21:55:26,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:26,085 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 148 flow [2023-11-24 21:55:26,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-11-24 21:55:26,086 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -15 predicate places. [2023-11-24 21:55:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 148 flow [2023-11-24 21:55:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:26,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:55:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:55:26,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:26,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1873301685, now seen corresponding path program 1 times [2023-11-24 21:55:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961265497] [2023-11-24 21:55:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:26,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961265497] [2023-11-24 21:55:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961265497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:55:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347323009] [2023-11-24 21:55:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:55:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:55:26,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:55:26,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 86 [2023-11-24 21:55:26,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:26,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 86 [2023-11-24 21:55:26,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:26,816 INFO L124 PetriNetUnfolderBase]: 118/451 cut-off events. [2023-11-24 21:55:26,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:26,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 451 events. 118/451 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2400 event pairs, 91 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 713. Up to 234 conditions per place. [2023-11-24 21:55:26,827 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 41 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-11-24 21:55:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 78 transitions, 256 flow [2023-11-24 21:55:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:55:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:55:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2023-11-24 21:55:26,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2023-11-24 21:55:26,830 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 216 transitions. [2023-11-24 21:55:26,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 216 transitions. [2023-11-24 21:55:26,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:26,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 216 transitions. [2023-11-24 21:55:26,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,837 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,837 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 148 flow. Second operand 4 states and 216 transitions. [2023-11-24 21:55:26,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 78 transitions, 256 flow [2023-11-24 21:55:26,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:26,844 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2023-11-24 21:55:26,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2023-11-24 21:55:26,847 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -14 predicate places. [2023-11-24 21:55:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2023-11-24 21:55:26,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:26,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:26,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:55:26,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:55:26,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:26,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1873301686, now seen corresponding path program 1 times [2023-11-24 21:55:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:26,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915232054] [2023-11-24 21:55:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:27,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:27,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915232054] [2023-11-24 21:55:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915232054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:27,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079685087] [2023-11-24 21:55:27,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:27,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 86 [2023-11-24 21:55:27,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 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) [2023-11-24 21:55:27,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:27,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 86 [2023-11-24 21:55:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:27,369 INFO L124 PetriNetUnfolderBase]: 107/397 cut-off events. [2023-11-24 21:55:27,369 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-24 21:55:27,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 397 events. 107/397 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2062 event pairs, 107 based on Foata normal form. 11/346 useless extension candidates. Maximal degree in co-relation 650. Up to 250 conditions per place. [2023-11-24 21:55:27,373 INFO L140 encePairwiseOnDemand]: 81/86 looper letters, 26 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-24 21:55:27,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 206 flow [2023-11-24 21:55:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:55:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:55:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2023-11-24 21:55:27,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7296511627906976 [2023-11-24 21:55:27,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 251 transitions. [2023-11-24 21:55:27,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 251 transitions. [2023-11-24 21:55:27,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:27,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 251 transitions. [2023-11-24 21:55:27,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,379 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 4 states and 251 transitions. [2023-11-24 21:55:27,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 206 flow [2023-11-24 21:55:27,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:27,383 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 149 flow [2023-11-24 21:55:27,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-11-24 21:55:27,385 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -16 predicate places. [2023-11-24 21:55:27,385 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 149 flow [2023-11-24 21:55:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 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) [2023-11-24 21:55:27,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:27,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:27,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:55:27,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:27,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash -428442148, now seen corresponding path program 1 times [2023-11-24 21:55:27,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:27,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596092814] [2023-11-24 21:55:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:27,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:27,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596092814] [2023-11-24 21:55:27,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596092814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:27,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:27,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260109176] [2023-11-24 21:55:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:27,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:27,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 86 [2023-11-24 21:55:27,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:27,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 86 [2023-11-24 21:55:27,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:27,985 INFO L124 PetriNetUnfolderBase]: 124/439 cut-off events. [2023-11-24 21:55:27,986 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-24 21:55:27,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 439 events. 124/439 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2274 event pairs, 96 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 759. Up to 236 conditions per place. [2023-11-24 21:55:27,989 INFO L140 encePairwiseOnDemand]: 80/86 looper letters, 42 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-24 21:55:27,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 257 flow [2023-11-24 21:55:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-24 21:55:27,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7674418604651163 [2023-11-24 21:55:27,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-24 21:55:27,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-24 21:55:27,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:27,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-24 21:55:27,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:27,995 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 149 flow. Second operand 3 states and 198 transitions. [2023-11-24 21:55:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 257 flow [2023-11-24 21:55:27,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:27,999 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 160 flow [2023-11-24 21:55:27,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-24 21:55:28,002 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -16 predicate places. [2023-11-24 21:55:28,002 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 160 flow [2023-11-24 21:55:28,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:28,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:28,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:55:28,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:28,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -428442147, now seen corresponding path program 1 times [2023-11-24 21:55:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:28,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443407183] [2023-11-24 21:55:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:28,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:28,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443407183] [2023-11-24 21:55:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443407183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:28,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:28,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:55:28,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380672516] [2023-11-24 21:55:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:28,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:28,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 86 [2023-11-24 21:55:28,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:28,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 86 [2023-11-24 21:55:28,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:28,480 INFO L124 PetriNetUnfolderBase]: 111/391 cut-off events. [2023-11-24 21:55:28,480 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-24 21:55:28,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 391 events. 111/391 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1930 event pairs, 111 based on Foata normal form. 14/362 useless extension candidates. Maximal degree in co-relation 718. Up to 263 conditions per place. [2023-11-24 21:55:28,484 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 27 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2023-11-24 21:55:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 61 transitions, 210 flow [2023-11-24 21:55:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-24 21:55:28,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7596899224806202 [2023-11-24 21:55:28,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-24 21:55:28,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-24 21:55:28,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:28,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-24 21:55:28,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,489 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 160 flow. Second operand 3 states and 196 transitions. [2023-11-24 21:55:28,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 61 transitions, 210 flow [2023-11-24 21:55:28,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:28,495 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 150 flow [2023-11-24 21:55:28,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-11-24 21:55:28,498 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -19 predicate places. [2023-11-24 21:55:28,499 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 150 flow [2023-11-24 21:55:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:28,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:28,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:55:28,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:28,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash -396804304, now seen corresponding path program 1 times [2023-11-24 21:55:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252797738] [2023-11-24 21:55:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252797738] [2023-11-24 21:55:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252797738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:29,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:29,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:55:29,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268161462] [2023-11-24 21:55:29,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:29,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:55:29,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:55:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:55:29,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 86 [2023-11-24 21:55:29,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 150 flow. Second operand has 8 states, 8 states have (on average 49.5) internal successors, (396), 8 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:29,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:29,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 86 [2023-11-24 21:55:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:29,591 INFO L124 PetriNetUnfolderBase]: 123/434 cut-off events. [2023-11-24 21:55:29,591 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-24 21:55:29,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 434 events. 123/434 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2210 event pairs, 35 based on Foata normal form. 0/390 useless extension candidates. Maximal degree in co-relation 784. Up to 147 conditions per place. [2023-11-24 21:55:29,595 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 52 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-11-24 21:55:29,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 298 flow [2023-11-24 21:55:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:55:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:55:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2023-11-24 21:55:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7209302325581395 [2023-11-24 21:55:29,597 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 248 transitions. [2023-11-24 21:55:29,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 248 transitions. [2023-11-24 21:55:29,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:29,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 248 transitions. [2023-11-24 21:55:29,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:29,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:29,601 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:29,601 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 150 flow. Second operand 4 states and 248 transitions. [2023-11-24 21:55:29,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 298 flow [2023-11-24 21:55:29,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:29,604 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 153 flow [2023-11-24 21:55:29,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=147, 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=4, PETRI_FLOW=153, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-24 21:55:29,605 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -18 predicate places. [2023-11-24 21:55:29,606 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 153 flow [2023-11-24 21:55:29,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 49.5) internal successors, (396), 8 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:29,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:29,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:55:29,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:29,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -396804303, now seen corresponding path program 1 times [2023-11-24 21:55:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308464405] [2023-11-24 21:55:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:30,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:30,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308464405] [2023-11-24 21:55:30,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308464405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:30,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:30,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:55:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346358946] [2023-11-24 21:55:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:55:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:55:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:55:30,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 86 [2023-11-24 21:55:30,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 153 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:30,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:30,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 86 [2023-11-24 21:55:30,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:30,661 INFO L124 PetriNetUnfolderBase]: 111/402 cut-off events. [2023-11-24 21:55:30,661 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-24 21:55:30,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 402 events. 111/402 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2054 event pairs, 30 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 734. Up to 133 conditions per place. [2023-11-24 21:55:30,665 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 43 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-11-24 21:55:30,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 279 flow [2023-11-24 21:55:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:55:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:55:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 275 transitions. [2023-11-24 21:55:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7994186046511628 [2023-11-24 21:55:30,668 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 275 transitions. [2023-11-24 21:55:30,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 275 transitions. [2023-11-24 21:55:30,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:30,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 275 transitions. [2023-11-24 21:55:30,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:30,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:30,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:30,672 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 153 flow. Second operand 4 states and 275 transitions. [2023-11-24 21:55:30,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 279 flow [2023-11-24 21:55:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 273 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:55:30,678 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 151 flow [2023-11-24 21:55:30,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-11-24 21:55:30,684 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -19 predicate places. [2023-11-24 21:55:30,685 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 151 flow [2023-11-24 21:55:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:55:30,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1430049960, now seen corresponding path program 1 times [2023-11-24 21:55:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790773406] [2023-11-24 21:55:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:32,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:32,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790773406] [2023-11-24 21:55:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790773406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:32,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:32,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:55:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819654840] [2023-11-24 21:55:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:55:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:55:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:55:34,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 86 [2023-11-24 21:55:34,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 34.25) internal successors, (411), 12 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:34,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:34,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 86 [2023-11-24 21:55:34,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:35,045 INFO L124 PetriNetUnfolderBase]: 191/593 cut-off events. [2023-11-24 21:55:35,045 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-24 21:55:35,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1167 conditions, 593 events. 191/593 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3272 event pairs, 14 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 1148. Up to 172 conditions per place. [2023-11-24 21:55:35,051 INFO L140 encePairwiseOnDemand]: 72/86 looper letters, 72 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2023-11-24 21:55:35,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 467 flow [2023-11-24 21:55:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:55:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-24 21:55:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 531 transitions. [2023-11-24 21:55:35,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749552772808587 [2023-11-24 21:55:35,056 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 531 transitions. [2023-11-24 21:55:35,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 531 transitions. [2023-11-24 21:55:35,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:35,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 531 transitions. [2023-11-24 21:55:35,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 40.84615384615385) internal successors, (531), 13 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 86.0) internal successors, (1204), 14 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,063 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 86.0) internal successors, (1204), 14 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,063 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 151 flow. Second operand 13 states and 531 transitions. [2023-11-24 21:55:35,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 467 flow [2023-11-24 21:55:35,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 112 transitions, 453 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:55:35,069 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 238 flow [2023-11-24 21:55:35,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=238, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2023-11-24 21:55:35,070 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -9 predicate places. [2023-11-24 21:55:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 238 flow [2023-11-24 21:55:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.25) internal successors, (411), 12 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:35,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:35,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:35,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:55:35,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:35,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:35,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1430049961, now seen corresponding path program 1 times [2023-11-24 21:55:35,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:35,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664569496] [2023-11-24 21:55:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:35,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664569496] [2023-11-24 21:55:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664569496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:35,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:35,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:55:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806151823] [2023-11-24 21:55:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:35,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:55:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:55:35,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:55:37,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 86 [2023-11-24 21:55:37,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 238 flow. Second operand has 13 states, 13 states have (on average 38.15384615384615) internal successors, (496), 13 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:37,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 86 [2023-11-24 21:55:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:37,781 INFO L124 PetriNetUnfolderBase]: 220/669 cut-off events. [2023-11-24 21:55:37,781 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-24 21:55:37,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 669 events. 220/669 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3910 event pairs, 63 based on Foata normal form. 15/617 useless extension candidates. Maximal degree in co-relation 1423. Up to 330 conditions per place. [2023-11-24 21:55:37,787 INFO L140 encePairwiseOnDemand]: 71/86 looper letters, 70 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2023-11-24 21:55:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 532 flow [2023-11-24 21:55:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:55:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:55:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 534 transitions. [2023-11-24 21:55:37,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174418604651163 [2023-11-24 21:55:37,791 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 534 transitions. [2023-11-24 21:55:37,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 534 transitions. [2023-11-24 21:55:37,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:37,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 534 transitions. [2023-11-24 21:55:37,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 44.5) internal successors, (534), 12 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,799 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,799 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 238 flow. Second operand 12 states and 534 transitions. [2023-11-24 21:55:37,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 532 flow [2023-11-24 21:55:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 108 transitions, 520 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-24 21:55:37,805 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 375 flow [2023-11-24 21:55:37,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2023-11-24 21:55:37,807 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2023-11-24 21:55:37,808 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 375 flow [2023-11-24 21:55:37,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.15384615384615) internal successors, (496), 13 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:37,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:37,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:55:37,809 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:37,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1755310156, now seen corresponding path program 1 times [2023-11-24 21:55:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731469779] [2023-11-24 21:55:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:37,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:37,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731469779] [2023-11-24 21:55:37,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731469779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:37,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:37,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771801765] [2023-11-24 21:55:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:37,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:55:37,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 86 [2023-11-24 21:55:37,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:37,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:37,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 86 [2023-11-24 21:55:37,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:38,172 INFO L124 PetriNetUnfolderBase]: 150/515 cut-off events. [2023-11-24 21:55:38,172 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2023-11-24 21:55:38,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 515 events. 150/515 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3018 event pairs, 64 based on Foata normal form. 6/485 useless extension candidates. Maximal degree in co-relation 1266. Up to 278 conditions per place. [2023-11-24 21:55:38,177 INFO L140 encePairwiseOnDemand]: 80/86 looper letters, 65 selfloop transitions, 6 changer transitions 0/102 dead transitions. [2023-11-24 21:55:38,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 102 transitions, 635 flow [2023-11-24 21:55:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:55:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:55:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-24 21:55:38,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8604651162790697 [2023-11-24 21:55:38,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-24 21:55:38,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-24 21:55:38,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:38,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-24 21:55:38,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,183 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 375 flow. Second operand 3 states and 222 transitions. [2023-11-24 21:55:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 102 transitions, 635 flow [2023-11-24 21:55:38,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 102 transitions, 611 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-11-24 21:55:38,190 INFO L231 Difference]: Finished difference. Result has 90 places, 81 transitions, 380 flow [2023-11-24 21:55:38,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2023-11-24 21:55:38,191 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 1 predicate places. [2023-11-24 21:55:38,191 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 380 flow [2023-11-24 21:55:38,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:38,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:38,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:55:38,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:38,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash -179667031, now seen corresponding path program 1 times [2023-11-24 21:55:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:38,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616030372] [2023-11-24 21:55:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:38,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:38,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616030372] [2023-11-24 21:55:38,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616030372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:55:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173048346] [2023-11-24 21:55:38,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:38,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:55:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:55:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:55:38,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 86 [2023-11-24 21:55:38,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:38,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 86 [2023-11-24 21:55:38,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:38,874 INFO L124 PetriNetUnfolderBase]: 168/557 cut-off events. [2023-11-24 21:55:38,874 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2023-11-24 21:55:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 557 events. 168/557 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3273 event pairs, 36 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 1470. Up to 241 conditions per place. [2023-11-24 21:55:38,880 INFO L140 encePairwiseOnDemand]: 79/86 looper letters, 66 selfloop transitions, 16 changer transitions 1/108 dead transitions. [2023-11-24 21:55:38,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 108 transitions, 654 flow [2023-11-24 21:55:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:55:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:55:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 320 transitions. [2023-11-24 21:55:38,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7441860465116279 [2023-11-24 21:55:38,883 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 320 transitions. [2023-11-24 21:55:38,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 320 transitions. [2023-11-24 21:55:38,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:38,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 320 transitions. [2023-11-24 21:55:38,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 86.0) internal successors, (516), 6 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,886 INFO L175 Difference]: Start difference. First operand has 90 places, 81 transitions, 380 flow. Second operand 5 states and 320 transitions. [2023-11-24 21:55:38,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 108 transitions, 654 flow [2023-11-24 21:55:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 108 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:55:38,893 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 443 flow [2023-11-24 21:55:38,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=443, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2023-11-24 21:55:38,894 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 5 predicate places. [2023-11-24 21:55:38,894 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 443 flow [2023-11-24 21:55:38,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:38,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:38,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:38,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:55:38,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:38,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash -179667032, now seen corresponding path program 1 times [2023-11-24 21:55:38,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:38,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950091207] [2023-11-24 21:55:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:38,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950091207] [2023-11-24 21:55:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950091207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:39,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:55:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611861348] [2023-11-24 21:55:39,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:39,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:39,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:39,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 86 [2023-11-24 21:55:39,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 443 flow. Second operand has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:39,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 86 [2023-11-24 21:55:39,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:39,708 INFO L124 PetriNetUnfolderBase]: 173/574 cut-off events. [2023-11-24 21:55:39,708 INFO L125 PetriNetUnfolderBase]: For 511/512 co-relation queries the response was YES. [2023-11-24 21:55:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 574 events. 173/574 cut-off events. For 511/512 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3399 event pairs, 54 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 1618. Up to 213 conditions per place. [2023-11-24 21:55:39,715 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 58 selfloop transitions, 22 changer transitions 0/105 dead transitions. [2023-11-24 21:55:39,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 669 flow [2023-11-24 21:55:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:55:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:55:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 320 transitions. [2023-11-24 21:55:39,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2023-11-24 21:55:39,718 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 320 transitions. [2023-11-24 21:55:39,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 320 transitions. [2023-11-24 21:55:39,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:39,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 320 transitions. [2023-11-24 21:55:39,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.333333333333336) internal successors, (320), 6 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,723 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,723 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 443 flow. Second operand 6 states and 320 transitions. [2023-11-24 21:55:39,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 105 transitions, 669 flow [2023-11-24 21:55:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 105 transitions, 667 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-24 21:55:39,730 INFO L231 Difference]: Finished difference. Result has 102 places, 87 transitions, 533 flow [2023-11-24 21:55:39,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=533, PETRI_PLACES=102, PETRI_TRANSITIONS=87} [2023-11-24 21:55:39,732 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 13 predicate places. [2023-11-24 21:55:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 87 transitions, 533 flow [2023-11-24 21:55:39,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:39,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:39,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:55:39,733 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:39,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1926163146, now seen corresponding path program 1 times [2023-11-24 21:55:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030403091] [2023-11-24 21:55:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:40,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:40,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030403091] [2023-11-24 21:55:40,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030403091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:40,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 21:55:40,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663863388] [2023-11-24 21:55:40,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:40,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:55:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:55:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:55:41,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 86 [2023-11-24 21:55:41,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 87 transitions, 533 flow. Second operand has 15 states, 15 states have (on average 39.4) internal successors, (591), 15 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:41,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:41,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 86 [2023-11-24 21:55:41,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:42,339 INFO L124 PetriNetUnfolderBase]: 187/608 cut-off events. [2023-11-24 21:55:42,339 INFO L125 PetriNetUnfolderBase]: For 1005/1005 co-relation queries the response was YES. [2023-11-24 21:55:42,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1969 conditions, 608 events. 187/608 cut-off events. For 1005/1005 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3644 event pairs, 29 based on Foata normal form. 6/579 useless extension candidates. Maximal degree in co-relation 1930. Up to 87 conditions per place. [2023-11-24 21:55:42,345 INFO L140 encePairwiseOnDemand]: 70/86 looper letters, 72 selfloop transitions, 46 changer transitions 2/138 dead transitions. [2023-11-24 21:55:42,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 138 transitions, 986 flow [2023-11-24 21:55:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:55:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:55:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 701 transitions. [2023-11-24 21:55:42,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094476744186046 [2023-11-24 21:55:42,349 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 701 transitions. [2023-11-24 21:55:42,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 701 transitions. [2023-11-24 21:55:42,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:42,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 701 transitions. [2023-11-24 21:55:42,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 43.8125) internal successors, (701), 16 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 86.0) internal successors, (1462), 17 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,398 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 86.0) internal successors, (1462), 17 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,398 INFO L175 Difference]: Start difference. First operand has 102 places, 87 transitions, 533 flow. Second operand 16 states and 701 transitions. [2023-11-24 21:55:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 138 transitions, 986 flow [2023-11-24 21:55:42,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 138 transitions, 982 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:55:42,407 INFO L231 Difference]: Finished difference. Result has 119 places, 98 transitions, 728 flow [2023-11-24 21:55:42,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=728, PETRI_PLACES=119, PETRI_TRANSITIONS=98} [2023-11-24 21:55:42,408 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 30 predicate places. [2023-11-24 21:55:42,408 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 98 transitions, 728 flow [2023-11-24 21:55:42,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 39.4) internal successors, (591), 15 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:42,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:42,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:55:42,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:42,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1162290833, now seen corresponding path program 1 times [2023-11-24 21:55:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122947815] [2023-11-24 21:55:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122947815] [2023-11-24 21:55:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122947815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:43,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 21:55:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002473993] [2023-11-24 21:55:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:43,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:55:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:43,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:55:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:55:44,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 86 [2023-11-24 21:55:44,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 98 transitions, 728 flow. Second operand has 14 states, 14 states have (on average 38.42857142857143) internal successors, (538), 14 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:44,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:44,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 86 [2023-11-24 21:55:44,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:45,453 INFO L124 PetriNetUnfolderBase]: 224/710 cut-off events. [2023-11-24 21:55:45,453 INFO L125 PetriNetUnfolderBase]: For 1876/1876 co-relation queries the response was YES. [2023-11-24 21:55:45,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 710 events. 224/710 cut-off events. For 1876/1876 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4401 event pairs, 36 based on Foata normal form. 45/741 useless extension candidates. Maximal degree in co-relation 2474. Up to 236 conditions per place. [2023-11-24 21:55:45,463 INFO L140 encePairwiseOnDemand]: 66/86 looper letters, 97 selfloop transitions, 53 changer transitions 0/166 dead transitions. [2023-11-24 21:55:45,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 166 transitions, 1398 flow [2023-11-24 21:55:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:55:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:55:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 832 transitions. [2023-11-24 21:55:45,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091799265605875 [2023-11-24 21:55:45,469 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 832 transitions. [2023-11-24 21:55:45,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 832 transitions. [2023-11-24 21:55:45,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:45,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 832 transitions. [2023-11-24 21:55:45,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 43.78947368421053) internal successors, (832), 19 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 86.0) internal successors, (1720), 20 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,480 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 86.0) internal successors, (1720), 20 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,481 INFO L175 Difference]: Start difference. First operand has 119 places, 98 transitions, 728 flow. Second operand 19 states and 832 transitions. [2023-11-24 21:55:45,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 166 transitions, 1398 flow [2023-11-24 21:55:45,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 166 transitions, 1326 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-24 21:55:45,496 INFO L231 Difference]: Finished difference. Result has 136 places, 116 transitions, 1036 flow [2023-11-24 21:55:45,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1036, PETRI_PLACES=136, PETRI_TRANSITIONS=116} [2023-11-24 21:55:45,498 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 47 predicate places. [2023-11-24 21:55:45,499 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 116 transitions, 1036 flow [2023-11-24 21:55:45,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.42857142857143) internal successors, (538), 14 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:45,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:45,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:45,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:55:45,500 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:45,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1162290834, now seen corresponding path program 1 times [2023-11-24 21:55:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:45,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919956340] [2023-11-24 21:55:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919956340] [2023-11-24 21:55:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919956340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:46,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:46,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 21:55:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992449946] [2023-11-24 21:55:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:46,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:55:46,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:55:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:55:48,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 86 [2023-11-24 21:55:48,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 116 transitions, 1036 flow. Second operand has 14 states, 14 states have (on average 36.42857142857143) internal successors, (510), 14 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) [2023-11-24 21:55:48,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:55:48,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 86 [2023-11-24 21:55:48,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:55:49,132 INFO L124 PetriNetUnfolderBase]: 234/670 cut-off events. [2023-11-24 21:55:49,133 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2023-11-24 21:55:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 670 events. 234/670 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3867 event pairs, 37 based on Foata normal form. 68/736 useless extension candidates. Maximal degree in co-relation 2738. Up to 212 conditions per place. [2023-11-24 21:55:49,142 INFO L140 encePairwiseOnDemand]: 72/86 looper letters, 94 selfloop transitions, 44 changer transitions 2/154 dead transitions. [2023-11-24 21:55:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 154 transitions, 1491 flow [2023-11-24 21:55:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:55:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-24 21:55:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 656 transitions. [2023-11-24 21:55:49,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2023-11-24 21:55:49,146 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 656 transitions. [2023-11-24 21:55:49,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 656 transitions. [2023-11-24 21:55:49,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:55:49,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 656 transitions. [2023-11-24 21:55:49,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 41.0) internal successors, (656), 16 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:49,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 86.0) internal successors, (1462), 17 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:49,157 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 86.0) internal successors, (1462), 17 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:55:49,158 INFO L175 Difference]: Start difference. First operand has 136 places, 116 transitions, 1036 flow. Second operand 16 states and 656 transitions. [2023-11-24 21:55:49,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 154 transitions, 1491 flow [2023-11-24 21:55:49,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 154 transitions, 1429 flow, removed 7 selfloop flow, removed 9 redundant places. [2023-11-24 21:55:49,181 INFO L231 Difference]: Finished difference. Result has 140 places, 115 transitions, 1067 flow [2023-11-24 21:55:49,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1067, PETRI_PLACES=140, PETRI_TRANSITIONS=115} [2023-11-24 21:55:49,182 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 51 predicate places. [2023-11-24 21:55:49,183 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 115 transitions, 1067 flow [2023-11-24 21:55:49,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.42857142857143) internal successors, (510), 14 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) [2023-11-24 21:55:49,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:49,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:49,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:55:49,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:49,185 INFO L85 PathProgramCache]: Analyzing trace with hash -930925543, now seen corresponding path program 1 times [2023-11-24 21:55:49,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:49,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921622317] [2023-11-24 21:55:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:55:49,252 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:55:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:55:49,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:55:49,331 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:55:49,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_LEAK (55 of 56 remaining) [2023-11-24 21:55:49,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 56 remaining) [2023-11-24 21:55:49,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 56 remaining) [2023-11-24 21:55:49,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 56 remaining) [2023-11-24 21:55:49,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 56 remaining) [2023-11-24 21:55:49,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 56 remaining) [2023-11-24 21:55:49,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 56 remaining) [2023-11-24 21:55:49,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 56 remaining) [2023-11-24 21:55:49,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 56 remaining) [2023-11-24 21:55:49,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 56 remaining) [2023-11-24 21:55:49,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 56 remaining) [2023-11-24 21:55:49,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 56 remaining) [2023-11-24 21:55:49,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 56 remaining) [2023-11-24 21:55:49,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 56 remaining) [2023-11-24 21:55:49,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 56 remaining) [2023-11-24 21:55:49,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 56 remaining) [2023-11-24 21:55:49,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 56 remaining) [2023-11-24 21:55:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 56 remaining) [2023-11-24 21:55:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 56 remaining) [2023-11-24 21:55:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 56 remaining) [2023-11-24 21:55:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 56 remaining) [2023-11-24 21:55:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 56 remaining) [2023-11-24 21:55:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 56 remaining) [2023-11-24 21:55:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 56 remaining) [2023-11-24 21:55:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 56 remaining) [2023-11-24 21:55:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 56 remaining) [2023-11-24 21:55:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 56 remaining) [2023-11-24 21:55:49,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 56 remaining) [2023-11-24 21:55:49,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 56 remaining) [2023-11-24 21:55:49,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 56 remaining) [2023-11-24 21:55:49,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 56 remaining) [2023-11-24 21:55:49,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 56 remaining) [2023-11-24 21:55:49,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 56 remaining) [2023-11-24 21:55:49,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 56 remaining) [2023-11-24 21:55:49,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 56 remaining) [2023-11-24 21:55:49,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 56 remaining) [2023-11-24 21:55:49,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 56 remaining) [2023-11-24 21:55:49,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 56 remaining) [2023-11-24 21:55:49,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 56 remaining) [2023-11-24 21:55:49,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 56 remaining) [2023-11-24 21:55:49,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 56 remaining) [2023-11-24 21:55:49,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 56 remaining) [2023-11-24 21:55:49,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 56 remaining) [2023-11-24 21:55:49,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 56 remaining) [2023-11-24 21:55:49,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 56 remaining) [2023-11-24 21:55:49,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 56 remaining) [2023-11-24 21:55:49,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 56 remaining) [2023-11-24 21:55:49,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 56 remaining) [2023-11-24 21:55:49,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 56 remaining) [2023-11-24 21:55:49,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 56 remaining) [2023-11-24 21:55:49,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 56 remaining) [2023-11-24 21:55:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:55:49,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:49,366 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 21:55:49,366 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:55:49,418 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre44 could not be translated [2023-11-24 21:55:49,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:55:49 BasicIcfg [2023-11-24 21:55:49,434 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:55:49,434 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:55:49,434 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:55:49,435 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:55:49,435 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:24" (3/4) ... [2023-11-24 21:55:49,437 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-24 21:55:49,438 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:55:49,439 INFO L158 Benchmark]: Toolchain (without parser) took 27211.28ms. Allocated memory was 178.3MB in the beginning and 448.8MB in the end (delta: 270.5MB). Free memory was 148.3MB in the beginning and 186.0MB in the end (delta: -37.6MB). Peak memory consumption was 233.9MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,439 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:55:49,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 979.58ms. Allocated memory is still 178.3MB. Free memory was 147.5MB in the beginning and 109.6MB in the end (delta: 37.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,440 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.50ms. Allocated memory is still 178.3MB. Free memory was 109.6MB in the beginning and 106.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,441 INFO L158 Benchmark]: Boogie Preprocessor took 74.16ms. Allocated memory is still 178.3MB. Free memory was 106.8MB in the beginning and 103.5MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,441 INFO L158 Benchmark]: RCFGBuilder took 1072.76ms. Allocated memory is still 178.3MB. Free memory was 103.5MB in the beginning and 100.1MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,441 INFO L158 Benchmark]: TraceAbstraction took 24975.56ms. Allocated memory was 178.3MB in the beginning and 448.8MB in the end (delta: 270.5MB). Free memory was 99.0MB in the beginning and 187.0MB in the end (delta: -88.1MB). Peak memory consumption was 183.4MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,442 INFO L158 Benchmark]: Witness Printer took 4.24ms. Allocated memory is still 448.8MB. Free memory was 187.0MB in the beginning and 186.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:55:49,444 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 979.58ms. Allocated memory is still 178.3MB. Free memory was 147.5MB in the beginning and 109.6MB in the end (delta: 37.9MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.50ms. Allocated memory is still 178.3MB. Free memory was 109.6MB in the beginning and 106.8MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.16ms. Allocated memory is still 178.3MB. Free memory was 106.8MB in the beginning and 103.5MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1072.76ms. Allocated memory is still 178.3MB. Free memory was 103.5MB in the beginning and 100.1MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 24975.56ms. Allocated memory was 178.3MB in the beginning and 448.8MB in the end (delta: 270.5MB). Free memory was 99.0MB in the beginning and 187.0MB in the end (delta: -88.1MB). Peak memory consumption was 183.4MB. Max. memory is 16.1GB. * Witness Printer took 4.24ms. Allocated memory is still 448.8MB. Free memory was 187.0MB in the beginning and 186.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre44 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1242]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1242. Possible FailurePath: [L1223-L1226] 0 struct s { int datum; struct s *next; } *A, *B; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1231] 0 pthread_mutex_t A_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1232] 0 pthread_mutex_t B_mutex = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1243] 0 pthread_t t1; [L1244] 0 struct s *p = malloc(sizeof(struct s)); [L1245] CALL 0 init(p,9) [L1228] 0 p -> datum = x VAL [A={0:0}, A_mutex={1:0}, B={0:0}, B_mutex={2:0}] [L1229] 0 p -> next = ((void *)0) [L1245] RET 0 init(p,9) [L1246] 0 A = malloc(sizeof(struct s)) [L1247] CALL 0 init(A,3) [L1228] 0 p -> datum = x VAL [A={-2:0}, A_mutex={1:0}, B={0:0}, B_mutex={2:0}] [L1229] 0 p -> next = ((void *)0) [L1247] RET 0 init(A,3) [L1248] 0 A->next = p [L1249] 0 B = malloc(sizeof(struct s)) [L1250] CALL 0 init(B,5) [L1228] 0 p -> datum = x VAL [A={-2:0}, A_mutex={1:0}, B={-3:0}, B_mutex={2:0}] [L1229] 0 p -> next = ((void *)0) [L1250] RET 0 init(B,5) [L1251] 0 p = malloc(sizeof(struct s)) [L1252] CALL 0 init(p,9) [L1228] 0 p -> datum = x VAL [A={-2:0}, A_mutex={1:0}, B={-3:0}, B_mutex={2:0}] [L1229] 0 p -> next = ((void *)0) [L1252] RET 0 init(p,9) [L1253] 0 B->next = p [L1254] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [A={-2:0}, A_mutex={1:0}, B={-3:0}, B_mutex={2:0}, arg={0:0}, p={11:0}, t1={13:0}] [L1256] EXPR 0 A->next [L1256] 0 p = A->next [L1257] 0 p->datum [L1260] EXPR 0 B->next [L1260] 0 p = B->next [L1261] 0 p->datum [L1263] 0 return 0; [L1263] 0 return 0; VAL [A={-2:0}, A_mutex={1:0}, B={-3:0}, B_mutex={2:0}, \result=0, arg={0:0}, p={11:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1254]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 116 locations, 56 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24.8s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 15.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4729 SdHoareTripleChecker+Valid, 11.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3740 mSDsluCounter, 2009 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1968 mSDsCounter, 322 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14339 IncrementalHoareTripleChecker+Invalid, 14661 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 322 mSolverCounterUnsat, 41 mSDtfsCounter, 14339 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1067occurred in iteration=16, InterpolantAutomatonStates: 118, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 229 ConstructedInterpolants, 0 QuantifiedInterpolants, 3280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-24 21:55:49,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI --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 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:52,213 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:52,317 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:55:52,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:52,324 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:52,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:52,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:52,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:52,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:52,367 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:52,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:52,368 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:52,369 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:52,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:52,375 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:52,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:52,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:52,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:52,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:52,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:52,379 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:55:52,380 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:55:52,381 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:55:52,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:52,382 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:55:52,382 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:55:52,383 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:55:52,383 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:55:52,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:52,384 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:52,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:52,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:52,387 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:52,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:52,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:52,388 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:52,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:52,389 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:55:52,390 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:55:52,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:52,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:52,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:52,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:52,391 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:55:52,392 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_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22e95fa30ebde8538537e9926c639bef97cab57433fef0bd6d73df06023fa7d1 [2023-11-24 21:55:52,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:52,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:52,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:52,870 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:52,870 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:52,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i [2023-11-24 21:55:56,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:56,639 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:56,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/sv-benchmarks/c/goblint-regression/09-regions_04-list2_nr.i [2023-11-24 21:55:56,674 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/537951130/e6f5dac33d1d4166af05f064b08d224a/FLAGdaa2d7446 [2023-11-24 21:55:56,695 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/data/537951130/e6f5dac33d1d4166af05f064b08d224a [2023-11-24 21:55:56,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:56,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:56,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:56,709 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:56,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:56,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:56" (1/1) ... [2023-11-24 21:55:56,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f19724d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:56, skipping insertion in model container [2023-11-24 21:55:56,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:56" (1/1) ... [2023-11-24 21:55:56,801 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:57,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:57,477 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:57,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:57,630 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:57,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57 WrapperNode [2023-11-24 21:55:57,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:57,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:57,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:57,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:57,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,703 INFO L138 Inliner]: procedures = 370, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 92 [2023-11-24 21:55:57,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:57,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:57,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:57,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:57,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,722 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,742 INFO L175 MemorySlicer]: Split 31 memory accesses to 4 slices as follows [5, 5, 1, 20]. 65 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [5, 5, 0, 0]. The 13 writes are split as follows [0, 0, 1, 12]. [2023-11-24 21:55:57,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,758 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,764 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,766 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:57,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:57,774 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:57,774 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:57,775 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (1/1) ... [2023-11-24 21:55:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:57,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:57,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:57,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-24 21:55:57,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-24 21:55:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-24 21:55:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-24 21:55:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:55:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:55:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:55:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:55:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:55:57,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:55:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:55:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:55:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-24 21:55:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-24 21:55:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2023-11-24 21:55:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2023-11-24 21:55:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2023-11-24 21:55:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2023-11-24 21:55:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:55:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:55:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:55:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:55:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:55:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:55:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:55:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:55:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:55:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:57,873 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:55:58,138 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:58,140 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:58,949 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:59,291 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:59,292 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 21:55:59,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:59 BoogieIcfgContainer [2023-11-24 21:55:59,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:59,296 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:59,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:59,299 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:59,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:56" (1/3) ... [2023-11-24 21:55:59,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b904ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:59, skipping insertion in model container [2023-11-24 21:55:59,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:57" (2/3) ... [2023-11-24 21:55:59,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b904ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:59, skipping insertion in model container [2023-11-24 21:55:59,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:59" (3/3) ... [2023-11-24 21:55:59,304 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_04-list2_nr.i [2023-11-24 21:55:59,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:59,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-11-24 21:55:59,326 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:55:59,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:55:59,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 86 transitions, 176 flow [2023-11-24 21:55:59,508 INFO L124 PetriNetUnfolderBase]: 0/85 cut-off events. [2023-11-24 21:55:59,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:59,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-11-24 21:55:59,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 86 transitions, 176 flow [2023-11-24 21:55:59,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 173 flow [2023-11-24 21:55:59,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:59,554 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;@61fb10b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:59,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-11-24 21:55:59,559 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:55:59,559 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:55:59,559 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:55:59,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:55:59,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:55:59,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:55:59,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash 11383, now seen corresponding path program 1 times [2023-11-24 21:55:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:55:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819668593] [2023-11-24 21:55:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:59,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:55:59,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:55:59,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:55:59,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-24 21:55:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:55:59,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:55:59,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:55:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:55:59,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:55:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:59,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:55:59,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:55:59,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819668593] [2023-11-24 21:55:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819668593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:59,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:59,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:55:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351633882] [2023-11-24 21:55:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:55:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:55:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:55:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:00,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 86 [2023-11-24 21:56:00,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 173 flow. Second operand has 3 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) [2023-11-24 21:56:00,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:00,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 86 [2023-11-24 21:56:00,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:00,480 INFO L124 PetriNetUnfolderBase]: 99/373 cut-off events. [2023-11-24 21:56:00,480 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:56:00,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 373 events. 99/373 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1841 event pairs, 99 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 564. Up to 223 conditions per place. [2023-11-24 21:56:00,488 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 28 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-24 21:56:00,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 221 flow [2023-11-24 21:56:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-11-24 21:56:00,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689922480620155 [2023-11-24 21:56:00,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-11-24 21:56:00,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-11-24 21:56:00,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:00,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-11-24 21:56:00,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:00,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:00,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:00,519 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 173 flow. Second operand 3 states and 178 transitions. [2023-11-24 21:56:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 221 flow [2023-11-24 21:56:00,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:56:00,528 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 164 flow [2023-11-24 21:56:00,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-11-24 21:56:00,534 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2023-11-24 21:56:00,534 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 164 flow [2023-11-24 21:56:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:56:00,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:00,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:56:00,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-24 21:56:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:00,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:56:00,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 11384, now seen corresponding path program 1 times [2023-11-24 21:56:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249958113] [2023-11-24 21:56:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:00,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:00,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:00,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:56:00,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-24 21:56:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:00,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 21:56:00,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:00,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-24 21:56:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:56:00,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-24 21:56:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:00,935 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:00,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249958113] [2023-11-24 21:56:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249958113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:00,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:56:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715892515] [2023-11-24 21:56:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:00,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:00,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:01,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 86 [2023-11-24 21:56:01,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:01,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:01,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 86 [2023-11-24 21:56:01,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:01,485 INFO L124 PetriNetUnfolderBase]: 99/365 cut-off events. [2023-11-24 21:56:01,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:56:01,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 365 events. 99/365 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1824 event pairs, 99 based on Foata normal form. 6/312 useless extension candidates. Maximal degree in co-relation 575. Up to 223 conditions per place. [2023-11-24 21:56:01,494 INFO L140 encePairwiseOnDemand]: 74/86 looper letters, 24 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-11-24 21:56:01,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 204 flow [2023-11-24 21:56:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:01,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 186 transitions. [2023-11-24 21:56:01,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7209302325581395 [2023-11-24 21:56:01,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 186 transitions. [2023-11-24 21:56:01,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 186 transitions. [2023-11-24 21:56:01,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:01,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 186 transitions. [2023-11-24 21:56:01,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:01,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:01,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:01,511 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 164 flow. Second operand 3 states and 186 transitions. [2023-11-24 21:56:01,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 204 flow [2023-11-24 21:56:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:01,515 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 148 flow [2023-11-24 21:56:01,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-11-24 21:56:01,516 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -15 predicate places. [2023-11-24 21:56:01,517 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 148 flow [2023-11-24 21:56:01,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:01,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:01,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:56:01,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:01,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:56:01,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1932468597, now seen corresponding path program 1 times [2023-11-24 21:56:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:01,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908536027] [2023-11-24 21:56:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:01,723 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:56:01,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-24 21:56:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:01,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:01,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:56:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:01,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:01,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:01,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908536027] [2023-11-24 21:56:01,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908536027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:01,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:01,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:01,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359405356] [2023-11-24 21:56:01,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:01,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:01,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:01,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:01,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:02,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2023-11-24 21:56:02,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:02,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2023-11-24 21:56:02,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:02,343 INFO L124 PetriNetUnfolderBase]: 118/451 cut-off events. [2023-11-24 21:56:02,344 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:56:02,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 451 events. 118/451 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2404 event pairs, 91 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 713. Up to 233 conditions per place. [2023-11-24 21:56:02,348 INFO L140 encePairwiseOnDemand]: 80/86 looper letters, 38 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-24 21:56:02,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 248 flow [2023-11-24 21:56:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-24 21:56:02,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7984496124031008 [2023-11-24 21:56:02,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-24 21:56:02,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-24 21:56:02,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:02,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-24 21:56:02,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,357 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 148 flow. Second operand 3 states and 206 transitions. [2023-11-24 21:56:02,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 248 flow [2023-11-24 21:56:02,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 78 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:02,360 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 154 flow [2023-11-24 21:56:02,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-11-24 21:56:02,362 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -15 predicate places. [2023-11-24 21:56:02,362 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 154 flow [2023-11-24 21:56:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:02,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:56:02,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:02,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:02,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:56:02,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1932468598, now seen corresponding path program 1 times [2023-11-24 21:56:02,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:02,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462836631] [2023-11-24 21:56:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:02,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:02,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:02,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:56:02,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-24 21:56:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:56:02,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:02,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:56:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:02,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:02,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:02,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462836631] [2023-11-24 21:56:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462836631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:02,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688983066] [2023-11-24 21:56:02,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:02,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 86 [2023-11-24 21:56:02,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:02,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:02,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 86 [2023-11-24 21:56:02,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:56:03,183 INFO L124 PetriNetUnfolderBase]: 107/397 cut-off events. [2023-11-24 21:56:03,184 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-24 21:56:03,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 397 events. 107/397 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2059 event pairs, 107 based on Foata normal form. 11/346 useless extension candidates. Maximal degree in co-relation 650. Up to 251 conditions per place. [2023-11-24 21:56:03,188 INFO L140 encePairwiseOnDemand]: 82/86 looper letters, 27 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-24 21:56:03,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 204 flow [2023-11-24 21:56:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:56:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2023-11-24 21:56:03,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7596899224806202 [2023-11-24 21:56:03,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2023-11-24 21:56:03,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2023-11-24 21:56:03,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:56:03,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2023-11-24 21:56:03,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:03,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:03,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:03,202 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 154 flow. Second operand 3 states and 196 transitions. [2023-11-24 21:56:03,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 204 flow [2023-11-24 21:56:03,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:56:03,208 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 144 flow [2023-11-24 21:56:03,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-11-24 21:56:03,210 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -18 predicate places. [2023-11-24 21:56:03,210 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 144 flow [2023-11-24 21:56:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:56:03,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:03,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:03,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:03,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-11-24 21:56:03,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1584481438, now seen corresponding path program 1 times [2023-11-24 21:56:03,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:56:03,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108252238] [2023-11-24 21:56:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:03,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-24 21:56:03,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:56:03,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-24 21:56:03,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_299880c2-bbb1-4879-9b56-360e19014c82/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-24 21:56:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:56:03,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:03,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:56:03,780 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:56:03,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:56:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:56:03,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:03,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:56:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108252238] [2023-11-24 21:56:03,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108252238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:03,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:03,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:56:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933080964] [2023-11-24 21:56:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:56:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:56:03,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 86 [2023-11-24 21:56:03,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:56:03,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:56:03,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 86 [2023-11-24 21:56:03,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand