./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU --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 b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:58:42,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:58:42,412 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 21:58:42,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:58:42,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:58:42,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:58:42,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:58:42,476 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:58:42,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:58:42,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:58:42,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:58:42,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:58:42,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:58:42,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:58:42,482 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:58:42,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:58:42,486 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:58:42,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:58:42,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:58:42,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:58:42,488 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 21:58:42,488 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 21:58:42,489 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 21:58:42,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:58:42,490 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 21:58:42,490 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:58:42,490 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 21:58:42,491 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:58:42,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:58:42,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:58:42,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:58:42,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:58:42,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:58:42,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:42,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:58:42,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:58:42,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:58:42,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:58:42,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:58:42,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:58:42,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:58:42,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:58:42,495 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_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-10-31 21:58:42,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:58:42,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:58:42,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:58:42,950 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:58:42,951 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:58:42,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c Unable to find full path for "g++" [2024-10-31 21:58:45,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:58:45,562 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:58:45,563 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-10-31 21:58:45,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/data/13ac72b9e/d33056cb9b444ba3b02a29504e6736ad/FLAG0b206464e [2024-10-31 21:58:45,589 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/data/13ac72b9e/d33056cb9b444ba3b02a29504e6736ad [2024-10-31 21:58:45,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:58:45,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:58:45,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:45,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:58:45,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:58:45,607 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:45" (1/1) ... [2024-10-31 21:58:45,608 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48927707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:45, skipping insertion in model container [2024-10-31 21:58:45,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:45" (1/1) ... [2024-10-31 21:58:45,652 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:58:45,947 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 21:58:45,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:45,967 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:58:46,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:46,026 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:58:46,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46 WrapperNode [2024-10-31 21:58:46,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:46,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:46,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:58:46,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:58:46,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,084 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 171 [2024-10-31 21:58:46,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:46,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:58:46,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:58:46,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:58:46,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,106 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,125 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 21:58:46,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,146 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:58:46,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:58:46,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:58:46,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:58:46,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (1/1) ... [2024-10-31 21:58:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:46,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:58:46,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:58:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:58:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 21:58:46,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 21:58:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 21:58:46,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 21:58:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:58:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:58:46,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:58:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:58:46,264 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 21:58:46,398 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:58:46,401 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:58:46,819 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 21:58:46,820 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:58:47,099 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:58:47,099 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 21:58:47,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:47 BoogieIcfgContainer [2024-10-31 21:58:47,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:58:47,102 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:58:47,102 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:58:47,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:58:47,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:58:45" (1/3) ... [2024-10-31 21:58:47,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b61a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:47, skipping insertion in model container [2024-10-31 21:58:47,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:46" (2/3) ... [2024-10-31 21:58:47,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b61a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:47, skipping insertion in model container [2024-10-31 21:58:47,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:47" (3/3) ... [2024-10-31 21:58:47,109 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-10-31 21:58:47,132 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:58:47,132 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-31 21:58:47,132 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 21:58:47,264 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 21:58:47,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-10-31 21:58:47,376 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-10-31 21:58:47,376 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 21:58:47,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-10-31 21:58:47,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-10-31 21:58:47,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-10-31 21:58:47,402 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:58:47,410 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45be1c32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:58:47,410 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-31 21:58:47,416 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 21:58:47,416 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 21:58:47,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 21:58:47,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:47,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:58:47,418 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:47,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 530117, now seen corresponding path program 1 times [2024-10-31 21:58:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573424915] [2024-10-31 21:58:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:47,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573424915] [2024-10-31 21:58:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573424915] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:47,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 21:58:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632937382] [2024-10-31 21:58:47,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:47,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:58:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:47,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:58:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 21:58:47,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 21:58:47,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:47,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:47,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 21:58:47,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:48,153 INFO L124 PetriNetUnfolderBase]: 183/426 cut-off events. [2024-10-31 21:58:48,153 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-31 21:58:48,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 426 events. 183/426 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2148 event pairs, 100 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 667. Up to 275 conditions per place. [2024-10-31 21:58:48,161 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-31 21:58:48,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 190 flow [2024-10-31 21:58:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:58:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-10-31 21:58:48,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-10-31 21:58:48,177 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-10-31 21:58:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 190 flow [2024-10-31 21:58:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:58:48,186 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-10-31 21:58:48,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-31 21:58:48,195 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-10-31 21:58:48,196 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-10-31 21:58:48,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:48,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:48,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 21:58:48,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:58:48,197 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:48,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 530118, now seen corresponding path program 1 times [2024-10-31 21:58:48,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:48,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009304056] [2024-10-31 21:58:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:48,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009304056] [2024-10-31 21:58:48,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009304056] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:48,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:48,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:58:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903881829] [2024-10-31 21:58:48,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:48,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:58:48,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:58:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:58:48,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 21:58:48,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:48,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:48,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 21:58:48,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:48,839 INFO L124 PetriNetUnfolderBase]: 183/430 cut-off events. [2024-10-31 21:58:48,840 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-31 21:58:48,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 430 events. 183/430 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2142 event pairs, 100 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 697. Up to 283 conditions per place. [2024-10-31 21:58:48,848 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 32 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-10-31 21:58:48,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 206 flow [2024-10-31 21:58:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 21:58:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-10-31 21:58:48,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-10-31 21:58:48,852 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 3 states and 136 transitions. [2024-10-31 21:58:48,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 206 flow [2024-10-31 21:58:48,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:58:48,856 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 148 flow [2024-10-31 21:58:48,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-10-31 21:58:48,859 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-10-31 21:58:48,859 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 148 flow [2024-10-31 21:58:48,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:48,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:48,860 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 21:58:48,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:58:48,861 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:48,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash 509460342, now seen corresponding path program 1 times [2024-10-31 21:58:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:48,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645393531] [2024-10-31 21:58:48,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:48,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645393531] [2024-10-31 21:58:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645393531] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011498556] [2024-10-31 21:58:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:49,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:49,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:49,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:49,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:58:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:49,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 21:58:49,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:49,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:58:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:49,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:49,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011498556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:49,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:49,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 21:58:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316244435] [2024-10-31 21:58:49,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:49,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:58:49,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:58:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:49,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 21:58:49,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:49,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:49,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 21:58:49,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:50,442 INFO L124 PetriNetUnfolderBase]: 187/446 cut-off events. [2024-10-31 21:58:50,442 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-31 21:58:50,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 446 events. 187/446 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2179 event pairs, 100 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 729. Up to 285 conditions per place. [2024-10-31 21:58:50,446 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 38 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-10-31 21:58:50,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 310 flow [2024-10-31 21:58:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:58:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:58:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2024-10-31 21:58:50,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-31 21:58:50,449 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 148 flow. Second operand 6 states and 252 transitions. [2024-10-31 21:58:50,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 310 flow [2024-10-31 21:58:50,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 21:58:50,452 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 246 flow [2024-10-31 21:58:50,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2024-10-31 21:58:50,453 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-10-31 21:58:50,453 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 246 flow [2024-10-31 21:58:50,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:50,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:50,454 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-31 21:58:50,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:50,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:50,657 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:50,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash -224513658, now seen corresponding path program 2 times [2024-10-31 21:58:50,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:50,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348042372] [2024-10-31 21:58:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:51,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348042372] [2024-10-31 21:58:51,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348042372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304085382] [2024-10-31 21:58:51,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:58:51,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:51,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:51,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:51,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:58:51,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:58:51,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:51,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 21:58:51,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:51,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:58:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:51,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304085382] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:51,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:51,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-31 21:58:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840314055] [2024-10-31 21:58:51,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:51,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 21:58:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 21:58:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-31 21:58:52,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 21:58:52,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 246 flow. Second operand has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:52,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:52,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 21:58:52,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:53,030 INFO L124 PetriNetUnfolderBase]: 183/446 cut-off events. [2024-10-31 21:58:53,031 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-31 21:58:53,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 446 events. 183/446 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2151 event pairs, 100 based on Foata normal form. 8/332 useless extension candidates. Maximal degree in co-relation 727. Up to 283 conditions per place. [2024-10-31 21:58:53,053 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-10-31 21:58:53,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 354 flow [2024-10-31 21:58:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:58:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 21:58:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2024-10-31 21:58:53,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2024-10-31 21:58:53,057 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 246 flow. Second operand 7 states and 284 transitions. [2024-10-31 21:58:53,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 354 flow [2024-10-31 21:58:53,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 338 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 21:58:53,061 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 252 flow [2024-10-31 21:58:53,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-10-31 21:58:53,062 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2024-10-31 21:58:53,062 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 252 flow [2024-10-31 21:58:53,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:53,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:53,063 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-10-31 21:58:53,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:58:53,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:53,268 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:53,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1009243594, now seen corresponding path program 3 times [2024-10-31 21:58:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:53,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933450620] [2024-10-31 21:58:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:53,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:58:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933450620] [2024-10-31 21:58:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933450620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798200713] [2024-10-31 21:58:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:58:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:53,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:53,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:58:53,594 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 21:58:53,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:53,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 21:58:53,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:53,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:58:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 21:58:53,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-31 21:58:54,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798200713] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:54,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-10-31 21:58:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111927332] [2024-10-31 21:58:54,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:54,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:58:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:58:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:58:54,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-10-31 21:58:54,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 252 flow. Second operand has 14 states, 14 states have (on average 33.785714285714285) internal successors, (473), 14 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:54,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:54,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-10-31 21:58:54,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:55,280 INFO L124 PetriNetUnfolderBase]: 181/440 cut-off events. [2024-10-31 21:58:55,280 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-31 21:58:55,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 440 events. 181/440 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2133 event pairs, 100 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 724. Up to 275 conditions per place. [2024-10-31 21:58:55,284 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 27 selfloop transitions, 19 changer transitions 0/73 dead transitions. [2024-10-31 21:58:55,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 320 flow [2024-10-31 21:58:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 21:58:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 21:58:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 400 transitions. [2024-10-31 21:58:55,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5509641873278237 [2024-10-31 21:58:55,286 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 252 flow. Second operand 11 states and 400 transitions. [2024-10-31 21:58:55,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 320 flow [2024-10-31 21:58:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 278 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-31 21:58:55,290 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 232 flow [2024-10-31 21:58:55,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=232, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-10-31 21:58:55,291 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2024-10-31 21:58:55,292 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 232 flow [2024-10-31 21:58:55,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.785714285714285) internal successors, (473), 14 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:55,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:55,292 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:55,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:58:55,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:55,493 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:55,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1825138744, now seen corresponding path program 1 times [2024-10-31 21:58:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:55,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054256512] [2024-10-31 21:58:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 21:58:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054256512] [2024-10-31 21:58:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054256512] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:55,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:58:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886968698] [2024-10-31 21:58:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:55,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:58:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:58:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:55,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-10-31 21:58:55,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:55,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:55,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-10-31 21:58:55,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:55,982 INFO L124 PetriNetUnfolderBase]: 258/568 cut-off events. [2024-10-31 21:58:55,982 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 21:58:55,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 568 events. 258/568 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2878 event pairs, 159 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 954. Up to 396 conditions per place. [2024-10-31 21:58:55,986 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 46 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-10-31 21:58:55,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 322 flow [2024-10-31 21:58:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:58:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 21:58:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-10-31 21:58:55,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-10-31 21:58:55,988 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 232 flow. Second operand 5 states and 162 transitions. [2024-10-31 21:58:55,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 322 flow [2024-10-31 21:58:55,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 284 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-10-31 21:58:55,991 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 192 flow [2024-10-31 21:58:55,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2024-10-31 21:58:55,992 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2024-10-31 21:58:55,992 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 192 flow [2024-10-31 21:58:55,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:55,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:55,993 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:55,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:58:55,993 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:55,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1825138745, now seen corresponding path program 1 times [2024-10-31 21:58:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039963606] [2024-10-31 21:58:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:58:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039963606] [2024-10-31 21:58:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039963606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:56,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741874204] [2024-10-31 21:58:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:56,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:56,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:58:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:56,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 21:58:56,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:56,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:58:56,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:58:57,058 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 21:58:57,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 21:58:57,081 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 [2024-10-31 21:58:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:58:57,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:58:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741874204] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:58,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:58:58,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-10-31 21:58:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352137919] [2024-10-31 21:58:58,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:58,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:58:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:58,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:58:58,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-10-31 21:58:58,964 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-31 21:58:58,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 192 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:58,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:58,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-31 21:58:58,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:59,280 INFO L124 PetriNetUnfolderBase]: 333/693 cut-off events. [2024-10-31 21:58:59,280 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 21:58:59,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 693 events. 333/693 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3324 event pairs, 97 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1200. Up to 324 conditions per place. [2024-10-31 21:58:59,284 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 60 selfloop transitions, 6 changer transitions 0/85 dead transitions. [2024-10-31 21:58:59,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 359 flow [2024-10-31 21:58:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:58:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:58:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-10-31 21:58:59,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-10-31 21:58:59,286 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 192 flow. Second operand 6 states and 232 transitions. [2024-10-31 21:58:59,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 359 flow [2024-10-31 21:58:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 21:58:59,292 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 210 flow [2024-10-31 21:58:59,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-10-31 21:58:59,294 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-10-31 21:58:59,294 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 210 flow [2024-10-31 21:58:59,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:59,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:59,294 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:59,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:58:59,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:59,496 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:59,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 744726742, now seen corresponding path program 1 times [2024-10-31 21:58:59,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:59,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194966425] [2024-10-31 21:58:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:59,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-31 21:58:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194966425] [2024-10-31 21:58:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194966425] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:59,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:58:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:58:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528419134] [2024-10-31 21:58:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:59,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:58:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:59,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:58:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:58:59,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-10-31 21:58:59,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:59,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:58:59,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-10-31 21:58:59,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:58:59,945 INFO L124 PetriNetUnfolderBase]: 357/710 cut-off events. [2024-10-31 21:58:59,945 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-10-31 21:58:59,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452 conditions, 710 events. 357/710 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3380 event pairs, 237 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1375. Up to 556 conditions per place. [2024-10-31 21:58:59,950 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 47 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-10-31 21:58:59,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 300 flow [2024-10-31 21:58:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:58:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:58:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-10-31 21:58:59,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-10-31 21:58:59,951 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 210 flow. Second operand 4 states and 137 transitions. [2024-10-31 21:58:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 300 flow [2024-10-31 21:58:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:58:59,956 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 198 flow [2024-10-31 21:58:59,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-10-31 21:58:59,958 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-31 21:58:59,959 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 198 flow [2024-10-31 21:58:59,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:58:59,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:58:59,959 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:59,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 21:58:59,960 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:58:59,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 744726743, now seen corresponding path program 1 times [2024-10-31 21:58:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313323216] [2024-10-31 21:58:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:00,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313323216] [2024-10-31 21:59:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313323216] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050021162] [2024-10-31 21:59:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:00,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:00,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:59:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:00,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 21:59:00,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:00,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:00,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 21:59:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050021162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:01,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:01,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 21:59:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028803097] [2024-10-31 21:59:01,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:01,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 21:59:01,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 21:59:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:59:02,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-31 21:59:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 198 flow. Second operand has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-31 21:59:02,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:02,707 INFO L124 PetriNetUnfolderBase]: 531/1032 cut-off events. [2024-10-31 21:59:02,707 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-10-31 21:59:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1032 events. 531/1032 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4837 event pairs, 93 based on Foata normal form. 0/931 useless extension candidates. Maximal degree in co-relation 1974. Up to 364 conditions per place. [2024-10-31 21:59:02,714 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 72 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-10-31 21:59:02,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 457 flow [2024-10-31 21:59:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:59:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 21:59:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-10-31 21:59:02,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6075757575757575 [2024-10-31 21:59:02,717 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 198 flow. Second operand 10 states and 401 transitions. [2024-10-31 21:59:02,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 457 flow [2024-10-31 21:59:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 21:59:02,721 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 245 flow [2024-10-31 21:59:02,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=245, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-10-31 21:59:02,722 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 6 predicate places. [2024-10-31 21:59:02,722 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 245 flow [2024-10-31 21:59:02,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:02,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:02,723 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:02,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:02,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:02,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:59:02,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1572386709, now seen corresponding path program 1 times [2024-10-31 21:59:02,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:02,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646875188] [2024-10-31 21:59:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:03,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:03,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646875188] [2024-10-31 21:59:03,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646875188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:03,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413244393] [2024-10-31 21:59:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:03,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:03,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:03,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:03,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:59:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:03,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 21:59:03,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:03,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:03,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 21:59:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:04,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413244393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:04,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-31 21:59:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931991107] [2024-10-31 21:59:04,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:04,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 21:59:04,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 21:59:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:59:04,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-10-31 21:59:04,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 245 flow. Second operand has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:04,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:04,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-10-31 21:59:04,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:05,800 INFO L124 PetriNetUnfolderBase]: 1253/2486 cut-off events. [2024-10-31 21:59:05,801 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2024-10-31 21:59:05,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5071 conditions, 2486 events. 1253/2486 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14343 event pairs, 245 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 4981. Up to 760 conditions per place. [2024-10-31 21:59:05,818 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 73 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-10-31 21:59:05,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 541 flow [2024-10-31 21:59:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:59:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 21:59:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 389 transitions. [2024-10-31 21:59:05,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5893939393939394 [2024-10-31 21:59:05,821 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 245 flow. Second operand 10 states and 389 transitions. [2024-10-31 21:59:05,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 541 flow [2024-10-31 21:59:05,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 520 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:59:05,825 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 271 flow [2024-10-31 21:59:05,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=271, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-10-31 21:59:05,827 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-10-31 21:59:05,827 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 271 flow [2024-10-31 21:59:05,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:05,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:05,828 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:05,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 21:59:06,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:06,033 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:59:06,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:06,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1499348240, now seen corresponding path program 1 times [2024-10-31 21:59:06,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:06,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972167214] [2024-10-31 21:59:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:06,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:06,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972167214] [2024-10-31 21:59:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972167214] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532752515] [2024-10-31 21:59:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:06,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:06,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:06,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:59:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:06,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-31 21:59:06,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:06,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:59:06,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:59:06,782 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 21:59:06,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 21:59:06,798 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 [2024-10-31 21:59:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:07,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532752515] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:07,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:59:07,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2024-10-31 21:59:07,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279268541] [2024-10-31 21:59:07,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:07,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:59:07,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:59:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2024-10-31 21:59:08,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-10-31 21:59:08,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:08,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:08,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-10-31 21:59:08,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:08,967 INFO L124 PetriNetUnfolderBase]: 1207/2408 cut-off events. [2024-10-31 21:59:08,967 INFO L125 PetriNetUnfolderBase]: For 1132/1132 co-relation queries the response was YES. [2024-10-31 21:59:08,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5307 conditions, 2408 events. 1207/2408 cut-off events. For 1132/1132 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14010 event pairs, 395 based on Foata normal form. 0/2329 useless extension candidates. Maximal degree in co-relation 5213. Up to 1136 conditions per place. [2024-10-31 21:59:08,989 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 59 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-10-31 21:59:08,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 456 flow [2024-10-31 21:59:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:59:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 21:59:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-10-31 21:59:08,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-10-31 21:59:08,991 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 271 flow. Second operand 6 states and 235 transitions. [2024-10-31 21:59:08,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 456 flow [2024-10-31 21:59:08,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 435 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 21:59:08,997 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 277 flow [2024-10-31 21:59:08,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-10-31 21:59:08,999 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-10-31 21:59:08,999 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 277 flow [2024-10-31 21:59:08,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:08,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:09,000 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:09,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:59:09,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:09,204 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:59:09,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1405812541, now seen corresponding path program 1 times [2024-10-31 21:59:09,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:09,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182673891] [2024-10-31 21:59:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:09,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-31 21:59:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:09,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182673891] [2024-10-31 21:59:09,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182673891] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:09,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:09,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:59:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210283878] [2024-10-31 21:59:09,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:09,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:59:09,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:59:09,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:09,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-10-31 21:59:09,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:09,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 21:59:09,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-10-31 21:59:09,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 21:59:09,862 INFO L124 PetriNetUnfolderBase]: 1522/3117 cut-off events. [2024-10-31 21:59:09,862 INFO L125 PetriNetUnfolderBase]: For 2580/2580 co-relation queries the response was YES. [2024-10-31 21:59:09,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7195 conditions, 3117 events. 1522/3117 cut-off events. For 2580/2580 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19746 event pairs, 795 based on Foata normal form. 68/3115 useless extension candidates. Maximal degree in co-relation 7106. Up to 1653 conditions per place. [2024-10-31 21:59:09,885 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 76 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-10-31 21:59:09,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 545 flow [2024-10-31 21:59:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:59:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 21:59:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-10-31 21:59:09,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2024-10-31 21:59:09,887 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 277 flow. Second operand 4 states and 195 transitions. [2024-10-31 21:59:09,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 545 flow [2024-10-31 21:59:09,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 530 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 21:59:09,894 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 283 flow [2024-10-31 21:59:09,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-10-31 21:59:09,895 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-10-31 21:59:09,896 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 283 flow [2024-10-31 21:59:09,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:09,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 21:59:09,896 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:09,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 21:59:09,897 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-31 21:59:09,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 954979816, now seen corresponding path program 1 times [2024-10-31 21:59:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353273184] [2024-10-31 21:59:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-31 21:59:10,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:10,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353273184] [2024-10-31 21:59:10,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353273184] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:10,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533031296] [2024-10-31 21:59:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:10,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:10,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:10,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:10,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66bcbbfa-efe2-4b14-af02-f3ec48f24848/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:59:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:10,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-31 21:59:10,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:10,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 21:59:10,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 21:59:10,868 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 21:59:10,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 21:59:10,883 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