./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/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_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/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_e9735c23-07bc-4140-bc10-9e7a6d288ff3/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 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:41:00,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:41:01,068 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:41:01,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:41:01,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:41:01,097 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:41:01,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:41:01,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:41:01,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:41:01,100 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:41:01,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:41:01,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:41:01,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:41:01,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:41:01,103 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:41:01,104 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:41:01,104 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:41:01,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:41:01,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:41:01,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:41:01,107 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:41:01,107 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:41:01,108 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:41:01,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:41:01,109 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:41:01,110 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:41:01,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:41:01,111 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:41:01,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:41:01,112 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:41:01,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:41:01,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:41:01,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:01,114 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:41:01,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:41:01,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:41:01,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:41:01,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:41:01,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:41:01,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:41:01,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:41:01,117 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_e9735c23-07bc-4140-bc10-9e7a6d288ff3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2023-11-24 21:41:01,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:41:01,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:41:01,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:41:01,444 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:41:01,444 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:41:01,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2023-11-24 21:41:04,650 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:05,080 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:05,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree-deref.i [2023-11-24 21:41:05,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/data/f134b6b0d/1b27ace82d7b4bffaf5a5a3fbb0df7fe/FLAGcc720ea87 [2023-11-24 21:41:05,137 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/data/f134b6b0d/1b27ace82d7b4bffaf5a5a3fbb0df7fe [2023-11-24 21:41:05,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:05,146 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:05,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:05,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:05,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:05,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:05,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394396d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05, skipping insertion in model container [2023-11-24 21:41:05,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:05,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:05,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:05,971 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:41:06,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:06,123 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:41:06,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06 WrapperNode [2023-11-24 21:41:06,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:06,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:06,126 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:41:06,126 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:41:06,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,224 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 253 [2023-11-24 21:41:06,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:06,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:41:06,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:41:06,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:41:06,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,245 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,279 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 5, 4, 5, 2, 1, 2, 14]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5, 0, 0, 0, 0]. The 13 writes are split as follows [0, 0, 2, 0, 1, 1, 1, 8]. [2023-11-24 21:41:06,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,309 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,321 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:41:06,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:41:06,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:41:06,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:41:06,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (1/1) ... [2023-11-24 21:41:06,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:06,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:06,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:41:06,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:41:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:41:06,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:41:06,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:41:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:41:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:41:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-24 21:41:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-24 21:41:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-24 21:41:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-24 21:41:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-24 21:41:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-24 21:41:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:41:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:41:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:41:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:41:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:41:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:41:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:41:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:41:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:41:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-24 21:41:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-24 21:41:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-24 21:41:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:41:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:41:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:41:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:41:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:41:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:41:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:41:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-24 21:41:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:41:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:41:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:41:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:41:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:41:06,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:41:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:41:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:41:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-24 21:41:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:41:06,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:41:06,440 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 21:41:06,732 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:41:06,735 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:41:07,432 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:41:07,692 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:41:07,693 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-24 21:41:07,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:07 BoogieIcfgContainer [2023-11-24 21:41:07,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:41:07,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:41:07,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:41:07,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:41:07,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:41:05" (1/3) ... [2023-11-24 21:41:07,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d23e49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:07, skipping insertion in model container [2023-11-24 21:41:07,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:06" (2/3) ... [2023-11-24 21:41:07,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d23e49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:07, skipping insertion in model container [2023-11-24 21:41:07,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:07" (3/3) ... [2023-11-24 21:41:07,702 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree-deref.i [2023-11-24 21:41:07,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:41:07,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-24 21:41:07,722 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:41:07,848 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-24 21:41:07,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2023-11-24 21:41:07,998 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2023-11-24 21:41:07,998 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-24 21:41:08,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1529 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-11-24 21:41:08,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2023-11-24 21:41:08,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2023-11-24 21:41:08,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:41:08,032 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;@17d86b1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:41:08,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-24 21:41:08,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:41:08,038 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:41:08,038 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:41:08,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:08,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:08,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:08,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 668337, now seen corresponding path program 1 times [2023-11-24 21:41:08,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:08,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213072567] [2023-11-24 21:41:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:08,490 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 21:41:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213072567] [2023-11-24 21:41:08,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213072567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:08,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:08,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534120921] [2023-11-24 21:41:08,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:08,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:08,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-11-24 21:41:08,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:08,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:08,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-11-24 21:41:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:10,256 INFO L124 PetriNetUnfolderBase]: 3268/7594 cut-off events. [2023-11-24 21:41:10,256 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-24 21:41:10,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7594 events. 3268/7594 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61785 event pairs, 3059 based on Foata normal form. 520/6970 useless extension candidates. Maximal degree in co-relation 11382. Up to 5189 conditions per place. [2023-11-24 21:41:10,337 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-11-24 21:41:10,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2023-11-24 21:41:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-24 21:41:10,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2023-11-24 21:41:10,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-24 21:41:10,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-24 21:41:10,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:10,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-24 21:41:10,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 21:41:10,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:10,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:10,385 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2023-11-24 21:41:10,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2023-11-24 21:41:10,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:41:10,401 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2023-11-24 21:41:10,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2023-11-24 21:41:10,410 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2023-11-24 21:41:10,411 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2023-11-24 21:41:10,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:10,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:10,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:41:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:41:10,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:10,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 668338, now seen corresponding path program 1 times [2023-11-24 21:41:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:10,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411165015] [2023-11-24 21:41:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:10,626 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 21:41:10,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:10,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411165015] [2023-11-24 21:41:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411165015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:10,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:10,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855044778] [2023-11-24 21:41:10,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:10,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:10,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:10,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2023-11-24 21:41:10,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 21:41:10,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:10,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2023-11-24 21:41:10,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:12,081 INFO L124 PetriNetUnfolderBase]: 3268/7592 cut-off events. [2023-11-24 21:41:12,082 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-24 21:41:12,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 7592 events. 3268/7592 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61707 event pairs, 3059 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 12870. Up to 5189 conditions per place. [2023-11-24 21:41:12,150 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-11-24 21:41:12,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2023-11-24 21:41:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-24 21:41:12,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-24 21:41:12,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-24 21:41:12,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-24 21:41:12,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:12,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-24 21:41:12,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 21:41:12,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:12,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:12,158 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2023-11-24 21:41:12,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2023-11-24 21:41:12,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:12,165 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2023-11-24 21:41:12,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2023-11-24 21:41:12,167 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2023-11-24 21:41:12,167 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2023-11-24 21:41:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 21:41:12,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:12,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:41:12,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:41:12,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:12,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:12,169 INFO L85 PathProgramCache]: Analyzing trace with hash 20721810, now seen corresponding path program 1 times [2023-11-24 21:41:12,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:12,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755386] [2023-11-24 21:41:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:12,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:12,206 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 21:41:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755386] [2023-11-24 21:41:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493595167] [2023-11-24 21:41:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:12,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:12,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-24 21:41:12,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 21:41:12,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:12,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-24 21:41:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:13,325 INFO L124 PetriNetUnfolderBase]: 3268/7598 cut-off events. [2023-11-24 21:41:13,325 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-24 21:41:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12897 conditions, 7598 events. 3268/7598 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61713 event pairs, 3059 based on Foata normal form. 1/6455 useless extension candidates. Maximal degree in co-relation 12872. Up to 5190 conditions per place. [2023-11-24 21:41:13,388 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-11-24 21:41:13,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2023-11-24 21:41:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-24 21:41:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2023-11-24 21:41:13,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-24 21:41:13,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-24 21:41:13,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:13,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-24 21:41:13,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 21:41:13,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:13,396 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:13,396 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2023-11-24 21:41:13,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2023-11-24 21:41:13,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:13,404 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2023-11-24 21:41:13,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2023-11-24 21:41:13,406 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2023-11-24 21:41:13,406 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2023-11-24 21:41:13,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 21:41:13,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:13,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:13,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:41:13,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:13,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 642291969, now seen corresponding path program 1 times [2023-11-24 21:41:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:13,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88078107] [2023-11-24 21:41:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:13,602 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 21:41:13,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:13,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88078107] [2023-11-24 21:41:13,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88078107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:13,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:13,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168274681] [2023-11-24 21:41:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:13,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:41:13,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:41:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:41:13,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-24 21:41:13,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 21:41:13,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:13,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-24 21:41:13,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:15,349 INFO L124 PetriNetUnfolderBase]: 4054/9541 cut-off events. [2023-11-24 21:41:15,350 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-24 21:41:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16298 conditions, 9541 events. 4054/9541 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83602 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16278. Up to 3712 conditions per place. [2023-11-24 21:41:15,418 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2023-11-24 21:41:15,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2023-11-24 21:41:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:41:15,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-11-24 21:41:15,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2023-11-24 21:41:15,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-11-24 21:41:15,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-11-24 21:41:15,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:15,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-11-24 21:41:15,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 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 21:41:15,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 21:41:15,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states 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 21:41:15,426 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2023-11-24 21:41:15,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2023-11-24 21:41:15,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:15,436 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2023-11-24 21:41:15,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2023-11-24 21:41:15,437 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2023-11-24 21:41:15,437 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2023-11-24 21:41:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 21:41:15,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:15,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:41:15,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:41:15,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:15,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 642291970, now seen corresponding path program 1 times [2023-11-24 21:41:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:15,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191029084] [2023-11-24 21:41:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:15,580 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 21:41:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:15,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191029084] [2023-11-24 21:41:15,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191029084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:15,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:15,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:15,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630608921] [2023-11-24 21:41:15,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:15,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:15,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:15,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-24 21:41:15,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:41:15,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:15,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-24 21:41:15,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:17,052 INFO L124 PetriNetUnfolderBase]: 4084/9802 cut-off events. [2023-11-24 21:41:17,052 INFO L125 PetriNetUnfolderBase]: For 1608/1608 co-relation queries the response was YES. [2023-11-24 21:41:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17694 conditions, 9802 events. 4084/9802 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85854 event pairs, 3767 based on Foata normal form. 1/8406 useless extension candidates. Maximal degree in co-relation 17660. Up to 6645 conditions per place. [2023-11-24 21:41:17,248 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-24 21:41:17,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2023-11-24 21:41:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-24 21:41:17,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2023-11-24 21:41:17,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-24 21:41:17,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-24 21:41:17,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:17,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-24 21:41:17,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states 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 21:41:17,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:17,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:17,256 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2023-11-24 21:41:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2023-11-24 21:41:17,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:17,286 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2023-11-24 21:41:17,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2023-11-24 21:41:17,292 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2023-11-24 21:41:17,293 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2023-11-24 21:41:17,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states 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 21:41:17,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:17,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:41:17,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:17,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash 441447057, now seen corresponding path program 1 times [2023-11-24 21:41:17,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:17,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121493047] [2023-11-24 21:41:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:17,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:17,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:17,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121493047] [2023-11-24 21:41:17,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121493047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:17,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865926165] [2023-11-24 21:41:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:17,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:17,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:17,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:41:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:17,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:41:17,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:17,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:17,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865926165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:17,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:17,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 21:41:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429849917] [2023-11-24 21:41:17,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:17,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:41:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:41:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:41:17,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-24 21:41:17,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 21:41:17,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:17,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-24 21:41:17,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:19,353 INFO L124 PetriNetUnfolderBase]: 3973/9582 cut-off events. [2023-11-24 21:41:19,353 INFO L125 PetriNetUnfolderBase]: For 897/955 co-relation queries the response was YES. [2023-11-24 21:41:19,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 9582 events. 3973/9582 cut-off events. For 897/955 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83676 event pairs, 3660 based on Foata normal form. 3/8202 useless extension candidates. Maximal degree in co-relation 17132. Up to 6451 conditions per place. [2023-11-24 21:41:19,451 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-11-24 21:41:19,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2023-11-24 21:41:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2023-11-24 21:41:19,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2023-11-24 21:41:19,455 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 503 transitions. [2023-11-24 21:41:19,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 503 transitions. [2023-11-24 21:41:19,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:19,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 503 transitions. [2023-11-24 21:41:19,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states 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 21:41:19,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 21:41:19,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 21:41:19,463 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2023-11-24 21:41:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2023-11-24 21:41:19,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:19,473 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2023-11-24 21:41:19,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2023-11-24 21:41:19,476 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2023-11-24 21:41:19,478 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2023-11-24 21:41:19,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states 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 21:41:19,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2023-11-24 21:41:19,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:19,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:19,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 799872739, now seen corresponding path program 1 times [2023-11-24 21:41:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106834538] [2023-11-24 21:41:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:20,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106834538] [2023-11-24 21:41:20,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106834538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512532857] [2023-11-24 21:41:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:20,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:20,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:20,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:20,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:41:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:20,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:41:20,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:20,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:20,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:20,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:20,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:20,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:20,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:41:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:21,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512532857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:21,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-24 21:41:21,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582019187] [2023-11-24 21:41:21,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:21,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:41:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:41:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-24 21:41:23,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-24 21:41:23,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 21:41:23,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:23,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-24 21:41:23,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:25,627 INFO L124 PetriNetUnfolderBase]: 4084/9814 cut-off events. [2023-11-24 21:41:25,627 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2023-11-24 21:41:25,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17744 conditions, 9814 events. 4084/9814 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85824 event pairs, 3767 based on Foata normal form. 3/8420 useless extension candidates. Maximal degree in co-relation 17711. Up to 6645 conditions per place. [2023-11-24 21:41:25,712 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 70 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2023-11-24 21:41:25,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 532 flow [2023-11-24 21:41:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:41:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:41:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2023-11-24 21:41:25,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2023-11-24 21:41:25,716 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 484 transitions. [2023-11-24 21:41:25,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 484 transitions. [2023-11-24 21:41:25,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:25,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 484 transitions. [2023-11-24 21:41:25,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.66666666666667) internal successors, (484), 6 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 21:41:25,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 21:41:25,724 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states 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 21:41:25,724 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 6 states and 484 transitions. [2023-11-24 21:41:25,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 532 flow [2023-11-24 21:41:25,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-24 21:41:25,732 INFO L231 Difference]: Finished difference. Result has 147 places, 132 transitions, 376 flow [2023-11-24 21:41:25,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=147, PETRI_TRANSITIONS=132} [2023-11-24 21:41:25,734 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 18 predicate places. [2023-11-24 21:41:25,735 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 132 transitions, 376 flow [2023-11-24 21:41:25,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states 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 21:41:25,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:25,737 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-24 21:41:25,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:41:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:25,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:25,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash 781167502, now seen corresponding path program 2 times [2023-11-24 21:41:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:25,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352655178] [2023-11-24 21:41:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:25,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-24 21:41:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352655178] [2023-11-24 21:41:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352655178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:26,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:26,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099152857] [2023-11-24 21:41:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:26,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:26,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:26,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:26,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-24 21:41:26,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 132 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:26,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:26,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-24 21:41:26,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:27,724 INFO L124 PetriNetUnfolderBase]: 4432/10447 cut-off events. [2023-11-24 21:41:27,724 INFO L125 PetriNetUnfolderBase]: For 929/929 co-relation queries the response was YES. [2023-11-24 21:41:27,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18912 conditions, 10447 events. 4432/10447 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93497 event pairs, 2895 based on Foata normal form. 0/8958 useless extension candidates. Maximal degree in co-relation 18872. Up to 4460 conditions per place. [2023-11-24 21:41:27,808 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 101 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2023-11-24 21:41:27,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 166 transitions, 654 flow [2023-11-24 21:41:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:41:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-11-24 21:41:27,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2023-11-24 21:41:27,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-11-24 21:41:27,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-11-24 21:41:27,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:27,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-11-24 21:41:27,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states 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 21:41:27,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:27,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:27,828 INFO L175 Difference]: Start difference. First operand has 147 places, 132 transitions, 376 flow. Second operand 3 states and 302 transitions. [2023-11-24 21:41:27,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 166 transitions, 654 flow [2023-11-24 21:41:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 646 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:41:27,838 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 368 flow [2023-11-24 21:41:27,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2023-11-24 21:41:27,839 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2023-11-24 21:41:27,839 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 368 flow [2023-11-24 21:41:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:27,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:27,850 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-24 21:41:27,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:41:27,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash 781167503, now seen corresponding path program 1 times [2023-11-24 21:41:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:27,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039816090] [2023-11-24 21:41:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:28,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039816090] [2023-11-24 21:41:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039816090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908523475] [2023-11-24 21:41:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:28,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:28,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:28,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:41:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:28,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:41:28,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:28,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:28,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908523475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:28,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:28,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-24 21:41:28,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953731019] [2023-11-24 21:41:28,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:28,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:41:28,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:41:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:41:28,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-24 21:41:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 130 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 21:41:28,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:28,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-24 21:41:28,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:41:30,078 INFO L124 PetriNetUnfolderBase]: 3973/9593 cut-off events. [2023-11-24 21:41:30,078 INFO L125 PetriNetUnfolderBase]: For 1524/1582 co-relation queries the response was YES. [2023-11-24 21:41:30,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17531 conditions, 9593 events. 3973/9593 cut-off events. For 1524/1582 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 83468 event pairs, 3660 based on Foata normal form. 6/8232 useless extension candidates. Maximal degree in co-relation 17468. Up to 6451 conditions per place. [2023-11-24 21:41:30,151 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2023-11-24 21:41:30,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 153 transitions, 650 flow [2023-11-24 21:41:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:41:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:41:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2023-11-24 21:41:30,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2023-11-24 21:41:30,157 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 956 transitions. [2023-11-24 21:41:30,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 956 transitions. [2023-11-24 21:41:30,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:41:30,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 956 transitions. [2023-11-24 21:41:30,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.66666666666667) internal successors, (956), 12 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 21:41:30,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 21:41:30,168 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states 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 21:41:30,168 INFO L175 Difference]: Start difference. First operand has 143 places, 130 transitions, 368 flow. Second operand 12 states and 956 transitions. [2023-11-24 21:41:30,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 153 transitions, 650 flow [2023-11-24 21:41:30,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:41:30,178 INFO L231 Difference]: Finished difference. Result has 159 places, 136 transitions, 464 flow [2023-11-24 21:41:30,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=464, PETRI_PLACES=159, PETRI_TRANSITIONS=136} [2023-11-24 21:41:30,179 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 30 predicate places. [2023-11-24 21:41:30,179 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 136 transitions, 464 flow [2023-11-24 21:41:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 21:41:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:41:30,181 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2023-11-24 21:41:30,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:41:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:30,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-24 21:41:30,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1553695354, now seen corresponding path program 2 times [2023-11-24 21:41:30,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:30,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614310769] [2023-11-24 21:41:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:30,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:31,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:31,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614310769] [2023-11-24 21:41:31,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614310769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:41:31,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413401034] [2023-11-24 21:41:31,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:41:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:41:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:31,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:41:31,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9735c23-07bc-4140-bc10-9e7a6d288ff3/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:41:31,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:41:31,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:41:31,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-24 21:41:31,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:41:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:32,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:32,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:32,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:32,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:32,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:41:32,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:41:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:32,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:41:32,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:32,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-24 21:41:32,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:32,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2023-11-24 21:41:33,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:33,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2023-11-24 21:41:34,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:41:34,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 79 [2023-11-24 21:41:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:34,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413401034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:41:34,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:41:34,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-11-24 21:41:34,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019897979] [2023-11-24 21:41:34,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:41:34,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:41:34,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:41:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:41:51,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-24 21:41:51,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 136 transitions, 464 flow. Second operand has 31 states, 31 states have (on average 69.54838709677419) internal successors, (2156), 31 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states 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 21:41:51,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:41:51,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-24 21:41:51,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand