./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC --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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:54:57,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:54:57,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:54:57,993 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:54:57,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:54:58,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:54:58,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:54:58,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:54:58,051 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:54:58,052 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:54:58,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:54:58,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:54:58,054 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:54:58,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:54:58,056 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:54:58,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:54:58,057 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:54:58,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:54:58,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:54:58,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:54:58,058 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:54:58,059 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:54:58,060 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:54:58,060 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:54:58,060 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:54:58,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:54:58,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:54:58,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:54:58,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:54:58,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:54:58,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:54:58,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:54:58,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:54:58,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:54:58,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:54:58,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:54:58,063 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:54:58,064 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC 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 -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2024-11-23 23:54:58,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:54:58,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:54:58,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:54:58,509 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:54:58,511 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:54:58,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-23 23:55:02,265 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/data/1598ecf50/d70e8d5a15664882a0ea4be64df44bd3/FLAGd51c585ad [2024-11-23 23:55:02,622 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:55:02,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2024-11-23 23:55:02,632 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/data/1598ecf50/d70e8d5a15664882a0ea4be64df44bd3/FLAGd51c585ad [2024-11-23 23:55:02,690 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/data/1598ecf50/d70e8d5a15664882a0ea4be64df44bd3 [2024-11-23 23:55:02,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:55:02,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:55:02,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:55:02,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:55:02,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:55:02,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:02" (1/1) ... [2024-11-23 23:55:02,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce9f962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:02, skipping insertion in model container [2024-11-23 23:55:02,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:02" (1/1) ... [2024-11-23 23:55:02,741 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:55:03,036 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:55:03,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:55:03,068 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:55:03,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:55:03,139 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:55:03,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03 WrapperNode [2024-11-23 23:55:03,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:55:03,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:55:03,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:55:03,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:55:03,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,219 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-23 23:55:03,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:55:03,220 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:55:03,220 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:55:03,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:55:03,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,251 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,271 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-11-23 23:55:03,271 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,282 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,289 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,297 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:55:03,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:55:03,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:55:03,298 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:55:03,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (1/1) ... [2024-11-23 23:55:03,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:55:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:03,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:55:03,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:55:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:55:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:55:03,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:55:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:55:03,397 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:55:03,397 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:55:03,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:55:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:55:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:55:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:55:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:55:03,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:55:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:55:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:55:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:55:03,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:55:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:55:03,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:55:03,405 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:55:03,602 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:55:03,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:55:04,375 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:55:04,376 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:55:05,186 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:55:05,186 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-23 23:55:05,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:05 BoogieIcfgContainer [2024-11-23 23:55:05,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:55:05,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:55:05,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:55:05,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:55:05,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:55:02" (1/3) ... [2024-11-23 23:55:05,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c2e83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:55:05, skipping insertion in model container [2024-11-23 23:55:05,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:03" (2/3) ... [2024-11-23 23:55:05,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c2e83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:55:05, skipping insertion in model container [2024-11-23 23:55:05,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:05" (3/3) ... [2024-11-23 23:55:05,202 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2024-11-23 23:55:05,223 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:55:05,225 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum2.wvr.c that has 4 procedures, 51 locations, 1 initial locations, 5 loop locations, and 18 error locations. [2024-11-23 23:55:05,225 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:55:05,347 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:55:05,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 131 flow [2024-11-23 23:55:05,516 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2024-11-23 23:55:05,522 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:55:05,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 5/52 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-11-23 23:55:05,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 131 flow [2024-11-23 23:55:05,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 51 transitions, 120 flow [2024-11-23 23:55:05,549 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:55:05,576 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;@5491ac0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:55:05,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-23 23:55:05,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:55:05,584 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:55:05,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:55:05,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:05,586 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:55:05,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:05,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 910290, now seen corresponding path program 1 times [2024-11-23 23:55:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224726301] [2024-11-23 23:55:05,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:05,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:05,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:05,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224726301] [2024-11-23 23:55:05,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224726301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:05,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:05,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:55:05,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55340853] [2024-11-23 23:55:05,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:05,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:06,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:06,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:06,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:06,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:06,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:06,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:06,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:06,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:07,448 INFO L124 PetriNetUnfolderBase]: 2971/4367 cut-off events. [2024-11-23 23:55:07,448 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-11-23 23:55:07,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 4367 events. 2971/4367 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26147 event pairs, 2534 based on Foata normal form. 1/2617 useless extension candidates. Maximal degree in co-relation 8290. Up to 4213 conditions per place. [2024-11-23 23:55:07,517 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-23 23:55:07,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 194 flow [2024-11-23 23:55:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-23 23:55:07,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-11-23 23:55:07,544 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 120 flow. Second operand 3 states and 74 transitions. [2024-11-23 23:55:07,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 194 flow [2024-11-23 23:55:07,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:55:07,568 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 104 flow [2024-11-23 23:55:07,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-23 23:55:07,576 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-11-23 23:55:07,577 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 104 flow [2024-11-23 23:55:07,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:07,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:07,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:55:07,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:55:07,578 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:07,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash 910291, now seen corresponding path program 1 times [2024-11-23 23:55:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270748792] [2024-11-23 23:55:07,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:08,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:08,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270748792] [2024-11-23 23:55:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270748792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:08,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776219144] [2024-11-23 23:55:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:08,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:55:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:08,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:55:08,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:55:08,193 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:08,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:08,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:08,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:08,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:09,152 INFO L124 PetriNetUnfolderBase]: 2971/4366 cut-off events. [2024-11-23 23:55:09,153 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-23 23:55:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8663 conditions, 4366 events. 2971/4366 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26177 event pairs, 2534 based on Foata normal form. 0/2615 useless extension candidates. Maximal degree in co-relation 8642. Up to 4217 conditions per place. [2024-11-23 23:55:09,193 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 38 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-23 23:55:09,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 186 flow [2024-11-23 23:55:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:55:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:55:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-23 23:55:09,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37727272727272726 [2024-11-23 23:55:09,200 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 104 flow. Second operand 4 states and 83 transitions. [2024-11-23 23:55:09,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 186 flow [2024-11-23 23:55:09,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:09,202 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 106 flow [2024-11-23 23:55:09,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-23 23:55:09,203 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-11-23 23:55:09,205 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 106 flow [2024-11-23 23:55:09,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:09,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:09,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 23:55:09,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:55:09,209 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:09,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash 28221618, now seen corresponding path program 1 times [2024-11-23 23:55:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:09,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433983287] [2024-11-23 23:55:09,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433983287] [2024-11-23 23:55:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433983287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:09,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195436596] [2024-11-23 23:55:09,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:09,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:55:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:09,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:55:09,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:55:09,477 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:55:09,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:09,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:09,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:55:09,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:10,289 INFO L124 PetriNetUnfolderBase]: 2971/4372 cut-off events. [2024-11-23 23:55:10,290 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-23 23:55:10,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 4372 events. 2971/4372 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26270 event pairs, 2534 based on Foata normal form. 1/2621 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-11-23 23:55:10,334 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 41 selfloop transitions, 4 changer transitions 1/51 dead transitions. [2024-11-23 23:55:10,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 214 flow [2024-11-23 23:55:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:55:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:55:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-23 23:55:10,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-23 23:55:10,336 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 106 flow. Second operand 4 states and 97 transitions. [2024-11-23 23:55:10,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 214 flow [2024-11-23 23:55:10,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:10,341 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 124 flow [2024-11-23 23:55:10,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-23 23:55:10,342 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-11-23 23:55:10,342 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 124 flow [2024-11-23 23:55:10,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:10,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:10,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:55:10,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:55:10,343 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:10,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1349578676, now seen corresponding path program 1 times [2024-11-23 23:55:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878046713] [2024-11-23 23:55:10,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:10,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878046713] [2024-11-23 23:55:10,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878046713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94005983] [2024-11-23 23:55:10,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:10,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:10,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:10,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:10,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:55:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:11,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:55:11,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:11,107 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 [2024-11-23 23:55:11,344 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:55:11,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-23 23:55:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:11,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:11,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94005983] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:11,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:55:11,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-23 23:55:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326892423] [2024-11-23 23:55:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:11,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:55:11,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:11,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:55:11,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:55:11,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:11,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:12,509 INFO L124 PetriNetUnfolderBase]: 2971/4370 cut-off events. [2024-11-23 23:55:12,510 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-23 23:55:12,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 4370 events. 2971/4370 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 26211 event pairs, 2534 based on Foata normal form. 1/2622 useless extension candidates. Maximal degree in co-relation 8654. Up to 4219 conditions per place. [2024-11-23 23:55:12,543 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-23 23:55:12,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 222 flow [2024-11-23 23:55:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:55:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:55:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-23 23:55:12,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2024-11-23 23:55:12,546 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 124 flow. Second operand 5 states and 97 transitions. [2024-11-23 23:55:12,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 222 flow [2024-11-23 23:55:12,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 212 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:12,548 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 128 flow [2024-11-23 23:55:12,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-23 23:55:12,553 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-11-23 23:55:12,553 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 128 flow [2024-11-23 23:55:12,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:12,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:12,554 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:12,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:55:12,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:12,755 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:12,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -134986034, now seen corresponding path program 1 times [2024-11-23 23:55:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:12,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7636498] [2024-11-23 23:55:12,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:13,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7636498] [2024-11-23 23:55:13,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7636498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:13,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57650900] [2024-11-23 23:55:13,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:13,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:13,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:55:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:13,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:55:13,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:13,269 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57650900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:13,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:13,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:55:13,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783713290] [2024-11-23 23:55:13,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:13,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:55:13,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:13,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:55:13,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:55:13,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:55:13,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:13,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:13,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:55:13,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:15,151 INFO L124 PetriNetUnfolderBase]: 5941/8738 cut-off events. [2024-11-23 23:55:15,152 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-23 23:55:15,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17354 conditions, 8738 events. 5941/8738 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 55422 event pairs, 5068 based on Foata normal form. 1/5250 useless extension candidates. Maximal degree in co-relation 8662. Up to 4217 conditions per place. [2024-11-23 23:55:15,209 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 74 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2024-11-23 23:55:15,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 418 flow [2024-11-23 23:55:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:55:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:55:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-11-23 23:55:15,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-11-23 23:55:15,215 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 128 flow. Second operand 8 states and 185 transitions. [2024-11-23 23:55:15,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 418 flow [2024-11-23 23:55:15,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:15,219 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 201 flow [2024-11-23 23:55:15,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=201, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-11-23 23:55:15,220 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-11-23 23:55:15,221 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 201 flow [2024-11-23 23:55:15,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:15,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:15,225 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-23 23:55:15,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:55:15,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:15,430 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:15,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1863533776, now seen corresponding path program 2 times [2024-11-23 23:55:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413041225] [2024-11-23 23:55:15,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:15,467 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:15,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:55:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413041225] [2024-11-23 23:55:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413041225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729722836] [2024-11-23 23:55:15,803 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:15,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:15,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:55:15,941 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:15,942 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:15,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:55:15,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:16,027 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 [2024-11-23 23:55:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:55:16,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:55:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729722836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:16,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:16,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-23 23:55:16,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689331002] [2024-11-23 23:55:16,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:16,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:55:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:16,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:55:16,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:55:16,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:16,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:16,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:16,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:16,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:18,461 INFO L124 PetriNetUnfolderBase]: 5941/8736 cut-off events. [2024-11-23 23:55:18,461 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-23 23:55:18,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17376 conditions, 8736 events. 5941/8736 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 55626 event pairs, 5068 based on Foata normal form. 2/5240 useless extension candidates. Maximal degree in co-relation 8666. Up to 8425 conditions per place. [2024-11-23 23:55:18,515 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 34 selfloop transitions, 19 changer transitions 0/57 dead transitions. [2024-11-23 23:55:18,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 313 flow [2024-11-23 23:55:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:55:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:55:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-11-23 23:55:18,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3012987012987013 [2024-11-23 23:55:18,517 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 201 flow. Second operand 7 states and 116 transitions. [2024-11-23 23:55:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 313 flow [2024-11-23 23:55:18,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 289 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:18,523 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 221 flow [2024-11-23 23:55:18,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-11-23 23:55:18,526 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-11-23 23:55:18,526 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 221 flow [2024-11-23 23:55:18,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:18,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:18,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:18,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:55:18,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 23:55:18,727 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:18,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046413, now seen corresponding path program 1 times [2024-11-23 23:55:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:18,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271132080] [2024-11-23 23:55:18,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:18,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:55:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271132080] [2024-11-23 23:55:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271132080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:18,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:18,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193725189] [2024-11-23 23:55:18,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:18,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:55:18,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:18,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:55:18,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:55:18,945 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:18,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:18,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:18,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:19,961 INFO L124 PetriNetUnfolderBase]: 4065/6024 cut-off events. [2024-11-23 23:55:19,962 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-23 23:55:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11991 conditions, 6024 events. 4065/6024 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36131 event pairs, 3384 based on Foata normal form. 0/3973 useless extension candidates. Maximal degree in co-relation 5972. Up to 5777 conditions per place. [2024-11-23 23:55:20,009 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 44 selfloop transitions, 6 changer transitions 0/54 dead transitions. [2024-11-23 23:55:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 315 flow [2024-11-23 23:55:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:55:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:55:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-23 23:55:20,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33090909090909093 [2024-11-23 23:55:20,012 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 221 flow. Second operand 5 states and 91 transitions. [2024-11-23 23:55:20,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 315 flow [2024-11-23 23:55:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 303 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:20,018 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 215 flow [2024-11-23 23:55:20,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-11-23 23:55:20,019 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-11-23 23:55:20,022 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 215 flow [2024-11-23 23:55:20,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:20,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:20,022 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:20,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:55:20,023 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:20,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046412, now seen corresponding path program 1 times [2024-11-23 23:55:20,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:20,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254403593] [2024-11-23 23:55:20,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:20,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254403593] [2024-11-23 23:55:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254403593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292384897] [2024-11-23 23:55:20,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:20,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:20,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:55:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:20,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:55:20,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:20,559 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 [2024-11-23 23:55:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:55:20,623 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 16 treesize of output 11 [2024-11-23 23:55:20,635 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:55:20,635 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 [2024-11-23 23:55:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:20,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:20,851 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 52 treesize of output 48 [2024-11-23 23:55:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:20,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292384897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:20,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:20,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-23 23:55:20,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469020864] [2024-11-23 23:55:20,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:20,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:55:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:20,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:55:20,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:55:21,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:21,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:21,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:21,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:21,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:22,360 INFO L124 PetriNetUnfolderBase]: 6493/9448 cut-off events. [2024-11-23 23:55:22,360 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-23 23:55:22,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18817 conditions, 9448 events. 6493/9448 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 58112 event pairs, 1858 based on Foata normal form. 0/6228 useless extension candidates. Maximal degree in co-relation 9386. Up to 3671 conditions per place. [2024-11-23 23:55:22,419 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 77 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-11-23 23:55:22,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 491 flow [2024-11-23 23:55:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:55:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:55:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-11-23 23:55:22,421 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-11-23 23:55:22,421 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 215 flow. Second operand 9 states and 176 transitions. [2024-11-23 23:55:22,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 491 flow [2024-11-23 23:55:22,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:22,425 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 271 flow [2024-11-23 23:55:22,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=271, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-11-23 23:55:22,426 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-11-23 23:55:22,426 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 271 flow [2024-11-23 23:55:22,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:22,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:22,426 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:22,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:55:22,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-23 23:55:22,631 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:22,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046411, now seen corresponding path program 1 times [2024-11-23 23:55:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477814164] [2024-11-23 23:55:22,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:22,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477814164] [2024-11-23 23:55:22,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477814164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:22,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:22,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:22,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140392259] [2024-11-23 23:55:22,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:22,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:55:22,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:22,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:55:22,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:55:22,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:22,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:22,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:22,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:22,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:23,505 INFO L124 PetriNetUnfolderBase]: 4041/5976 cut-off events. [2024-11-23 23:55:23,505 INFO L125 PetriNetUnfolderBase]: For 2638/2638 co-relation queries the response was YES. [2024-11-23 23:55:23,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14443 conditions, 5976 events. 4041/5976 cut-off events. For 2638/2638 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35148 event pairs, 3200 based on Foata normal form. 0/4632 useless extension candidates. Maximal degree in co-relation 7198. Up to 5677 conditions per place. [2024-11-23 23:55:23,548 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 47 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-23 23:55:23,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 360 flow [2024-11-23 23:55:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:55:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:55:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-23 23:55:23,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-11-23 23:55:23,550 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 271 flow. Second operand 4 states and 78 transitions. [2024-11-23 23:55:23,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 360 flow [2024-11-23 23:55:23,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:23,554 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 259 flow [2024-11-23 23:55:23,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-23 23:55:23,556 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-11-23 23:55:23,557 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 259 flow [2024-11-23 23:55:23,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:23,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:23,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:23,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:55:23,558 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:23,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1276046410, now seen corresponding path program 1 times [2024-11-23 23:55:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:23,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786241251] [2024-11-23 23:55:23,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:23,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786241251] [2024-11-23 23:55:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786241251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:23,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013769273] [2024-11-23 23:55:23,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:23,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:23,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:23,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:55:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:23,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:55:23,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:24,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:24,133 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 [2024-11-23 23:55:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013769273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:24,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:55:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424864765] [2024-11-23 23:55:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:24,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:55:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:24,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:55:24,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:55:24,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:55:24,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:24,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:24,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:55:24,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:25,278 INFO L124 PetriNetUnfolderBase]: 3629/5428 cut-off events. [2024-11-23 23:55:25,278 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2024-11-23 23:55:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 5428 events. 3629/5428 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31877 event pairs, 1760 based on Foata normal form. 0/4358 useless extension candidates. Maximal degree in co-relation 6539. Up to 3341 conditions per place. [2024-11-23 23:55:25,309 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 70 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-11-23 23:55:25,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 495 flow [2024-11-23 23:55:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:55:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:55:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-23 23:55:25,311 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-11-23 23:55:25,311 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 259 flow. Second operand 7 states and 161 transitions. [2024-11-23 23:55:25,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 495 flow [2024-11-23 23:55:25,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:25,317 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 278 flow [2024-11-23 23:55:25,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2024-11-23 23:55:25,318 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-11-23 23:55:25,318 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 278 flow [2024-11-23 23:55:25,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:25,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:25,318 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:25,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:55:25,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:55:25,520 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:25,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2060685287, now seen corresponding path program 1 times [2024-11-23 23:55:25,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149105807] [2024-11-23 23:55:25,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:25,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:25,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149105807] [2024-11-23 23:55:25,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149105807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:25,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200506432] [2024-11-23 23:55:25,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:25,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:25,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:25,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:55:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:25,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:55:25,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:25,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:26,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200506432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:26,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:26,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:55:26,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779388486] [2024-11-23 23:55:26,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:26,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:55:26,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:26,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:55:26,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:55:26,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:55:26,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:26,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:26,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:55:26,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:27,230 INFO L124 PetriNetUnfolderBase]: 2915/4276 cut-off events. [2024-11-23 23:55:27,231 INFO L125 PetriNetUnfolderBase]: For 4387/4387 co-relation queries the response was YES. [2024-11-23 23:55:27,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 4276 events. 2915/4276 cut-off events. For 4387/4387 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22258 event pairs, 2027 based on Foata normal form. 0/3577 useless extension candidates. Maximal degree in co-relation 7981. Up to 2967 conditions per place. [2024-11-23 23:55:27,267 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 82 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-11-23 23:55:27,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 652 flow [2024-11-23 23:55:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:55:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:55:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-11-23 23:55:27,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-23 23:55:27,270 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 278 flow. Second operand 9 states and 189 transitions. [2024-11-23 23:55:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 652 flow [2024-11-23 23:55:27,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 601 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:55:27,279 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 297 flow [2024-11-23 23:55:27,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=297, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-11-23 23:55:27,281 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-11-23 23:55:27,282 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 297 flow [2024-11-23 23:55:27,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:27,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:27,282 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:27,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:55:27,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:27,483 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:27,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 57885676, now seen corresponding path program 1 times [2024-11-23 23:55:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264803979] [2024-11-23 23:55:27,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:27,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264803979] [2024-11-23 23:55:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264803979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108747746] [2024-11-23 23:55:27,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:27,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:27,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:55:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:27,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:55:27,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:27,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:28,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108747746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:28,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:28,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:55:28,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220908948] [2024-11-23 23:55:28,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:28,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:55:28,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:28,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:55:28,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:55:28,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:55:28,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:28,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:28,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:55:28,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:28,968 INFO L124 PetriNetUnfolderBase]: 2805/4118 cut-off events. [2024-11-23 23:55:28,968 INFO L125 PetriNetUnfolderBase]: For 2014/2151 co-relation queries the response was YES. [2024-11-23 23:55:28,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 4118 events. 2805/4118 cut-off events. For 2014/2151 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21596 event pairs, 1937 based on Foata normal form. 44/3445 useless extension candidates. Maximal degree in co-relation 7855. Up to 3135 conditions per place. [2024-11-23 23:55:28,984 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 84 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2024-11-23 23:55:28,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 105 transitions, 643 flow [2024-11-23 23:55:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:55:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:55:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-11-23 23:55:28,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-23 23:55:28,987 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 297 flow. Second operand 10 states and 210 transitions. [2024-11-23 23:55:28,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 105 transitions, 643 flow [2024-11-23 23:55:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 617 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:55:28,993 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 349 flow [2024-11-23 23:55:28,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2024-11-23 23:55:28,994 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-11-23 23:55:28,994 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 349 flow [2024-11-23 23:55:28,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:28,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:28,994 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:29,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:55:29,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:29,199 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:29,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 312426272, now seen corresponding path program 1 times [2024-11-23 23:55:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294465185] [2024-11-23 23:55:29,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:29,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:29,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294465185] [2024-11-23 23:55:29,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294465185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:29,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:29,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:55:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500554321] [2024-11-23 23:55:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:29,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:55:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:29,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:55:29,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:55:29,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:55:29,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:29,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:29,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:55:29,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:30,307 INFO L124 PetriNetUnfolderBase]: 2913/4329 cut-off events. [2024-11-23 23:55:30,307 INFO L125 PetriNetUnfolderBase]: For 4803/4926 co-relation queries the response was YES. [2024-11-23 23:55:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11731 conditions, 4329 events. 2913/4329 cut-off events. For 4803/4926 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22478 event pairs, 1251 based on Foata normal form. 0/3547 useless extension candidates. Maximal degree in co-relation 8578. Up to 2335 conditions per place. [2024-11-23 23:55:30,327 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 72 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-11-23 23:55:30,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 647 flow [2024-11-23 23:55:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:55:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:55:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-11-23 23:55:30,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-11-23 23:55:30,329 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 349 flow. Second operand 6 states and 114 transitions. [2024-11-23 23:55:30,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 647 flow [2024-11-23 23:55:30,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 617 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-23 23:55:30,334 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 370 flow [2024-11-23 23:55:30,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-11-23 23:55:30,335 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-11-23 23:55:30,335 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 370 flow [2024-11-23 23:55:30,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:30,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:30,336 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:30,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:55:30,336 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:30,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 312426274, now seen corresponding path program 1 times [2024-11-23 23:55:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:30,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944156917] [2024-11-23 23:55:30,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:30,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944156917] [2024-11-23 23:55:30,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944156917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902145077] [2024-11-23 23:55:30,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:30,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:30,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:30,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:30,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:55:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:30,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 23:55:30,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:31,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:31,272 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 36 treesize of output 32 [2024-11-23 23:55:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:31,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902145077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:31,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-23 23:55:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111020391] [2024-11-23 23:55:31,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:31,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:55:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:31,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:55:31,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:55:32,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:55:32,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 370 flow. Second operand has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:32,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:32,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:55:32,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:33,648 INFO L124 PetriNetUnfolderBase]: 2884/4372 cut-off events. [2024-11-23 23:55:33,648 INFO L125 PetriNetUnfolderBase]: For 6654/6866 co-relation queries the response was YES. [2024-11-23 23:55:33,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13789 conditions, 4372 events. 2884/4372 cut-off events. For 6654/6866 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23622 event pairs, 1540 based on Foata normal form. 0/3861 useless extension candidates. Maximal degree in co-relation 9621. Up to 2178 conditions per place. [2024-11-23 23:55:33,668 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 104 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-11-23 23:55:33,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 967 flow [2024-11-23 23:55:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:55:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:55:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 301 transitions. [2024-11-23 23:55:33,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36484848484848487 [2024-11-23 23:55:33,670 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 370 flow. Second operand 15 states and 301 transitions. [2024-11-23 23:55:33,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 967 flow [2024-11-23 23:55:33,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 133 transitions, 958 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:33,685 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 445 flow [2024-11-23 23:55:33,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=445, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-11-23 23:55:33,686 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-11-23 23:55:33,686 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 445 flow [2024-11-23 23:55:33,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:33,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:33,687 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:33,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:55:33,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:55:33,891 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:33,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 578323275, now seen corresponding path program 2 times [2024-11-23 23:55:33,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:33,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73244538] [2024-11-23 23:55:33,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:33,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:33,920 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:34,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73244538] [2024-11-23 23:55:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73244538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884690285] [2024-11-23 23:55:34,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:34,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:34,237 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:34,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:55:34,360 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:34,360 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:34,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:55:34,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:34,372 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 [2024-11-23 23:55:34,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:55:34,436 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 16 treesize of output 11 [2024-11-23 23:55:34,450 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:55:34,451 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 [2024-11-23 23:55:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:34,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:34,715 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 52 treesize of output 48 [2024-11-23 23:55:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:34,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884690285] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:34,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:34,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:55:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512934285] [2024-11-23 23:55:34,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:34,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:55:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:34,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:55:34,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:55:38,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:55:43,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:55:47,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:55:47,130 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-23 23:55:47,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 445 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:47,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:47,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-23 23:55:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:48,961 INFO L124 PetriNetUnfolderBase]: 5424/8061 cut-off events. [2024-11-23 23:55:48,961 INFO L125 PetriNetUnfolderBase]: For 15627/15886 co-relation queries the response was YES. [2024-11-23 23:55:48,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26412 conditions, 8061 events. 5424/8061 cut-off events. For 15627/15886 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 44928 event pairs, 1735 based on Foata normal form. 0/7354 useless extension candidates. Maximal degree in co-relation 22095. Up to 2843 conditions per place. [2024-11-23 23:55:49,004 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 144 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-11-23 23:55:49,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1339 flow [2024-11-23 23:55:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:55:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:55:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 260 transitions. [2024-11-23 23:55:49,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3151515151515151 [2024-11-23 23:55:49,006 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 445 flow. Second operand 15 states and 260 transitions. [2024-11-23 23:55:49,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1339 flow [2024-11-23 23:55:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1273 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-23 23:55:49,032 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 506 flow [2024-11-23 23:55:49,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=506, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2024-11-23 23:55:49,032 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-11-23 23:55:49,033 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 506 flow [2024-11-23 23:55:49,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:49,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:49,033 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:49,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:55:49,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 23:55:49,234 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:49,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 578323277, now seen corresponding path program 1 times [2024-11-23 23:55:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:49,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568407132] [2024-11-23 23:55:49,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:55:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568407132] [2024-11-23 23:55:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568407132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944481826] [2024-11-23 23:55:49,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:49,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:49,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:49,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:55:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:49,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:55:49,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:55:49,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:50,029 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 [2024-11-23 23:55:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:55:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944481826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:50,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-23 23:55:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216933987] [2024-11-23 23:55:50,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:50,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:55:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:50,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:55:50,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:55:50,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:55:50,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 506 flow. Second operand has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:50,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:50,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:55:50,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:52,217 INFO L124 PetriNetUnfolderBase]: 4930/7464 cut-off events. [2024-11-23 23:55:52,217 INFO L125 PetriNetUnfolderBase]: For 17350/17590 co-relation queries the response was YES. [2024-11-23 23:55:52,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 7464 events. 4930/7464 cut-off events. For 17350/17590 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 42411 event pairs, 2028 based on Foata normal form. 0/7168 useless extension candidates. Maximal degree in co-relation 22735. Up to 3337 conditions per place. [2024-11-23 23:55:52,271 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 142 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2024-11-23 23:55:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 168 transitions, 1339 flow [2024-11-23 23:55:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:55:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 23:55:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 291 transitions. [2024-11-23 23:55:52,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37792207792207794 [2024-11-23 23:55:52,273 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 506 flow. Second operand 14 states and 291 transitions. [2024-11-23 23:55:52,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 168 transitions, 1339 flow [2024-11-23 23:55:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1310 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-23 23:55:52,308 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 517 flow [2024-11-23 23:55:52,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=517, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-11-23 23:55:52,308 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-11-23 23:55:52,309 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 517 flow [2024-11-23 23:55:52,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:52,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:52,309 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:52,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:55:52,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:55:52,510 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:52,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303560, now seen corresponding path program 2 times [2024-11-23 23:55:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:52,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721493979] [2024-11-23 23:55:52,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:52,538 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:52,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:53,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:53,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721493979] [2024-11-23 23:55:53,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721493979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962124038] [2024-11-23 23:55:53,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:55:53,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:53,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:53,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:55:53,330 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:55:53,330 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:55:53,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 23:55:53,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:53,357 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 [2024-11-23 23:55:53,530 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:55:53,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-23 23:55:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:53,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:54,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962124038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:54,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:54,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-23 23:55:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801244752] [2024-11-23 23:55:54,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:54,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:55:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:54,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:55:54,225 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:55:54,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-23 23:55:54,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 517 flow. Second operand has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:54,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:54,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-23 23:55:54,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:58,648 INFO L124 PetriNetUnfolderBase]: 6524/9258 cut-off events. [2024-11-23 23:55:58,649 INFO L125 PetriNetUnfolderBase]: For 26573/27050 co-relation queries the response was YES. [2024-11-23 23:55:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34664 conditions, 9258 events. 6524/9258 cut-off events. For 26573/27050 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 46978 event pairs, 1481 based on Foata normal form. 2/9257 useless extension candidates. Maximal degree in co-relation 29237. Up to 2196 conditions per place. [2024-11-23 23:55:58,702 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 198 selfloop transitions, 31 changer transitions 0/232 dead transitions. [2024-11-23 23:55:58,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 1854 flow [2024-11-23 23:55:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-23 23:55:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-23 23:55:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 391 transitions. [2024-11-23 23:55:58,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3231404958677686 [2024-11-23 23:55:58,705 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 517 flow. Second operand 22 states and 391 transitions. [2024-11-23 23:55:58,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 1854 flow [2024-11-23 23:55:58,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 232 transitions, 1718 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-11-23 23:55:58,724 INFO L231 Difference]: Finished difference. Result has 118 places, 85 transitions, 647 flow [2024-11-23 23:55:58,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=647, PETRI_PLACES=118, PETRI_TRANSITIONS=85} [2024-11-23 23:55:58,725 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-11-23 23:55:58,725 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 85 transitions, 647 flow [2024-11-23 23:55:58,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.0) internal successors, (275), 25 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:58,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:58,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:58,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:55:58,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:55:58,926 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:55:58,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1349303558, now seen corresponding path program 1 times [2024-11-23 23:55:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658599744] [2024-11-23 23:55:58,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:55:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658599744] [2024-11-23 23:55:59,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658599744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949311319] [2024-11-23 23:55:59,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:59,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:59,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:59,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:59,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:55:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:59,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:55:59,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:59,470 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 [2024-11-23 23:55:59,476 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 [2024-11-23 23:55:59,613 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:55:59,613 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 [2024-11-23 23:55:59,655 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 31 treesize of output 24 [2024-11-23 23:56:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:56:00,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:56:00,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949311319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:00,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:00,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-23 23:56:00,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983964072] [2024-11-23 23:56:00,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:00,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:56:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:00,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:56:00,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:56:01,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 55 [2024-11-23 23:56:01,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 85 transitions, 647 flow. Second operand has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:01,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:01,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 55 [2024-11-23 23:56:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:03,617 INFO L124 PetriNetUnfolderBase]: 4783/7061 cut-off events. [2024-11-23 23:56:03,618 INFO L125 PetriNetUnfolderBase]: For 21077/21781 co-relation queries the response was YES. [2024-11-23 23:56:03,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 7061 events. 4783/7061 cut-off events. For 21077/21781 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 36633 event pairs, 1582 based on Foata normal form. 321/7194 useless extension candidates. Maximal degree in co-relation 22936. Up to 2722 conditions per place. [2024-11-23 23:56:03,682 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 153 selfloop transitions, 25 changer transitions 0/184 dead transitions. [2024-11-23 23:56:03,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 184 transitions, 1474 flow [2024-11-23 23:56:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:56:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:56:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 259 transitions. [2024-11-23 23:56:03,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31393939393939396 [2024-11-23 23:56:03,685 INFO L175 Difference]: Start difference. First operand has 118 places, 85 transitions, 647 flow. Second operand 15 states and 259 transitions. [2024-11-23 23:56:03,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 184 transitions, 1474 flow [2024-11-23 23:56:03,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 184 transitions, 1432 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-23 23:56:03,732 INFO L231 Difference]: Finished difference. Result has 123 places, 85 transitions, 660 flow [2024-11-23 23:56:03,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=660, PETRI_PLACES=123, PETRI_TRANSITIONS=85} [2024-11-23 23:56:03,733 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-11-23 23:56:03,733 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 85 transitions, 660 flow [2024-11-23 23:56:03,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.095238095238095) internal successors, (212), 21 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:03,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:03,733 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:03,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 23:56:03,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:56:03,934 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:03,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 297965264, now seen corresponding path program 1 times [2024-11-23 23:56:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879619044] [2024-11-23 23:56:03,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:56:04,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879619044] [2024-11-23 23:56:04,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879619044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:04,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208242709] [2024-11-23 23:56:04,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:04,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:04,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:04,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:04,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:56:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:04,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:56:04,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:56:04,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:56:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208242709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:04,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:04,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-23 23:56:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977673499] [2024-11-23 23:56:04,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:04,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:56:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:04,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:56:04,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:56:04,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:04,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 85 transitions, 660 flow. Second operand has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:05,985 INFO L124 PetriNetUnfolderBase]: 5603/7930 cut-off events. [2024-11-23 23:56:05,986 INFO L125 PetriNetUnfolderBase]: For 28402/29528 co-relation queries the response was YES. [2024-11-23 23:56:06,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31336 conditions, 7930 events. 5603/7930 cut-off events. For 28402/29528 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 38135 event pairs, 3830 based on Foata normal form. 177/7888 useless extension candidates. Maximal degree in co-relation 28160. Up to 6817 conditions per place. [2024-11-23 23:56:06,049 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 88 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-11-23 23:56:06,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 1018 flow [2024-11-23 23:56:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:56:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:56:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-11-23 23:56:06,051 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-11-23 23:56:06,051 INFO L175 Difference]: Start difference. First operand has 123 places, 85 transitions, 660 flow. Second operand 10 states and 198 transitions. [2024-11-23 23:56:06,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 1018 flow [2024-11-23 23:56:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 116 transitions, 960 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-23 23:56:06,078 INFO L231 Difference]: Finished difference. Result has 118 places, 84 transitions, 652 flow [2024-11-23 23:56:06,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=118, PETRI_TRANSITIONS=84} [2024-11-23 23:56:06,079 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-11-23 23:56:06,079 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 84 transitions, 652 flow [2024-11-23 23:56:06,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:06,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:06,079 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:06,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 23:56:06,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:06,280 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:06,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash 504381784, now seen corresponding path program 2 times [2024-11-23 23:56:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:06,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361536445] [2024-11-23 23:56:06,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:06,306 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:06,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:56:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361536445] [2024-11-23 23:56:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361536445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332602676] [2024-11-23 23:56:06,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:06,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:06,527 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:06,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:56:06,664 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:06,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:06,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:56:06,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:56:06,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:56:06,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332602676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:06,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:06,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-23 23:56:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371884206] [2024-11-23 23:56:06,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:06,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:56:06,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:06,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:56:06,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:56:07,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:07,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 84 transitions, 652 flow. Second operand has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:07,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:07,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:07,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:09,336 INFO L124 PetriNetUnfolderBase]: 9759/13820 cut-off events. [2024-11-23 23:56:09,336 INFO L125 PetriNetUnfolderBase]: For 34689/35658 co-relation queries the response was YES. [2024-11-23 23:56:09,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53609 conditions, 13820 events. 9759/13820 cut-off events. For 34689/35658 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 73280 event pairs, 4565 based on Foata normal form. 146/13616 useless extension candidates. Maximal degree in co-relation 36042. Up to 7116 conditions per place. [2024-11-23 23:56:09,440 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 172 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-11-23 23:56:09,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 1783 flow [2024-11-23 23:56:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:56:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-23 23:56:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-11-23 23:56:09,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3972027972027972 [2024-11-23 23:56:09,442 INFO L175 Difference]: Start difference. First operand has 118 places, 84 transitions, 652 flow. Second operand 13 states and 284 transitions. [2024-11-23 23:56:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 1783 flow [2024-11-23 23:56:09,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 209 transitions, 1723 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-23 23:56:09,525 INFO L231 Difference]: Finished difference. Result has 128 places, 94 transitions, 812 flow [2024-11-23 23:56:09,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=812, PETRI_PLACES=128, PETRI_TRANSITIONS=94} [2024-11-23 23:56:09,526 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-11-23 23:56:09,526 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 94 transitions, 812 flow [2024-11-23 23:56:09,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.3) internal successors, (266), 20 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:09,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:09,527 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:09,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-23 23:56:09,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:09,727 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:09,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash -454942228, now seen corresponding path program 2 times [2024-11-23 23:56:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907565276] [2024-11-23 23:56:09,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:09,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:09,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:56:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907565276] [2024-11-23 23:56:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907565276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802202934] [2024-11-23 23:56:10,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:10,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:10,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:10,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:10,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:56:10,453 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:10,454 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:10,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:56:10,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:10,466 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 [2024-11-23 23:56:10,558 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:56:10,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-23 23:56:10,573 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:56:10,574 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 [2024-11-23 23:56:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:56:10,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:11,390 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 65 treesize of output 61 [2024-11-23 23:56:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:56:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802202934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:11,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:11,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-23 23:56:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466990444] [2024-11-23 23:56:11,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:11,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:56:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:11,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:56:11,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:56:12,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-23 23:56:12,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 94 transitions, 812 flow. Second operand has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:12,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:12,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-23 23:56:12,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:14,547 INFO L124 PetriNetUnfolderBase]: 9491/13207 cut-off events. [2024-11-23 23:56:14,547 INFO L125 PetriNetUnfolderBase]: For 55770/58052 co-relation queries the response was YES. [2024-11-23 23:56:14,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55706 conditions, 13207 events. 9491/13207 cut-off events. For 55770/58052 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 68800 event pairs, 1820 based on Foata normal form. 463/13330 useless extension candidates. Maximal degree in co-relation 43695. Up to 3879 conditions per place. [2024-11-23 23:56:14,664 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 175 selfloop transitions, 19 changer transitions 0/199 dead transitions. [2024-11-23 23:56:14,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 199 transitions, 2061 flow [2024-11-23 23:56:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:56:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:56:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-11-23 23:56:14,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3477272727272727 [2024-11-23 23:56:14,666 INFO L175 Difference]: Start difference. First operand has 128 places, 94 transitions, 812 flow. Second operand 8 states and 153 transitions. [2024-11-23 23:56:14,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 199 transitions, 2061 flow [2024-11-23 23:56:14,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 199 transitions, 2004 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-11-23 23:56:14,737 INFO L231 Difference]: Finished difference. Result has 130 places, 95 transitions, 826 flow [2024-11-23 23:56:14,737 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=130, PETRI_TRANSITIONS=95} [2024-11-23 23:56:14,738 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-11-23 23:56:14,738 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 95 transitions, 826 flow [2024-11-23 23:56:14,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.4) internal successors, (285), 25 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:14,738 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:14,739 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:14,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:56:14,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:14,939 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:14,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -454942226, now seen corresponding path program 1 times [2024-11-23 23:56:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:14,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107873697] [2024-11-23 23:56:14,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:14,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:56:15,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107873697] [2024-11-23 23:56:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107873697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527527987] [2024-11-23 23:56:15,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:15,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:15,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:15,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:15,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:56:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:15,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:56:15,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:56:15,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:16,193 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 36 treesize of output 32 [2024-11-23 23:56:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:56:16,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527527987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:16,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:16,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-23 23:56:16,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40116562] [2024-11-23 23:56:16,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:16,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:56:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:16,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:56:16,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:56:17,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:17,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 95 transitions, 826 flow. Second operand has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:17,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:17,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:17,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:22,094 INFO L124 PetriNetUnfolderBase]: 12117/16793 cut-off events. [2024-11-23 23:56:22,094 INFO L125 PetriNetUnfolderBase]: For 77718/80676 co-relation queries the response was YES. [2024-11-23 23:56:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74940 conditions, 16793 events. 12117/16793 cut-off events. For 77718/80676 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 90061 event pairs, 2519 based on Foata normal form. 605/16954 useless extension candidates. Maximal degree in co-relation 60346. Up to 2191 conditions per place. [2024-11-23 23:56:22,241 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 397 selfloop transitions, 48 changer transitions 0/450 dead transitions. [2024-11-23 23:56:22,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 450 transitions, 4125 flow [2024-11-23 23:56:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-23 23:56:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-23 23:56:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 707 transitions. [2024-11-23 23:56:22,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36727272727272725 [2024-11-23 23:56:22,243 INFO L175 Difference]: Start difference. First operand has 130 places, 95 transitions, 826 flow. Second operand 35 states and 707 transitions. [2024-11-23 23:56:22,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 450 transitions, 4125 flow [2024-11-23 23:56:22,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 450 transitions, 4058 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-23 23:56:22,344 INFO L231 Difference]: Finished difference. Result has 158 places, 109 transitions, 980 flow [2024-11-23 23:56:22,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=980, PETRI_PLACES=158, PETRI_TRANSITIONS=109} [2024-11-23 23:56:22,344 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-11-23 23:56:22,345 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 109 transitions, 980 flow [2024-11-23 23:56:22,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.25) internal successors, (371), 28 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:22,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:22,345 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:22,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:56:22,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 23:56:22,546 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:22,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash -952144469, now seen corresponding path program 1 times [2024-11-23 23:56:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:22,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39036151] [2024-11-23 23:56:22,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:56:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39036151] [2024-11-23 23:56:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39036151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215366434] [2024-11-23 23:56:22,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:22,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:22,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:56:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:22,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:56:22,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:56:23,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:56:23,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215366434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:23,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:23,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-23 23:56:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975873150] [2024-11-23 23:56:23,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:23,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:56:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:23,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:56:23,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:56:23,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:23,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 109 transitions, 980 flow. Second operand has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:23,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:23,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:23,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:25,943 INFO L124 PetriNetUnfolderBase]: 8527/12268 cut-off events. [2024-11-23 23:56:25,943 INFO L125 PetriNetUnfolderBase]: For 57985/59448 co-relation queries the response was YES. [2024-11-23 23:56:25,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54875 conditions, 12268 events. 8527/12268 cut-off events. For 57985/59448 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 64901 event pairs, 4328 based on Foata normal form. 337/12431 useless extension candidates. Maximal degree in co-relation 43446. Up to 6290 conditions per place. [2024-11-23 23:56:26,055 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 147 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-11-23 23:56:26,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 188 transitions, 1924 flow [2024-11-23 23:56:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:56:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 23:56:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-11-23 23:56:26,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-11-23 23:56:26,057 INFO L175 Difference]: Start difference. First operand has 158 places, 109 transitions, 980 flow. Second operand 12 states and 236 transitions. [2024-11-23 23:56:26,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 188 transitions, 1924 flow [2024-11-23 23:56:26,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 188 transitions, 1690 flow, removed 14 selfloop flow, removed 25 redundant places. [2024-11-23 23:56:26,228 INFO L231 Difference]: Finished difference. Result has 147 places, 113 transitions, 947 flow [2024-11-23 23:56:26,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=947, PETRI_PLACES=147, PETRI_TRANSITIONS=113} [2024-11-23 23:56:26,229 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-11-23 23:56:26,229 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 113 transitions, 947 flow [2024-11-23 23:56:26,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:26,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:26,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:26,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:56:26,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-23 23:56:26,430 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:26,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1809192991, now seen corresponding path program 1 times [2024-11-23 23:56:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741343081] [2024-11-23 23:56:26,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:56:26,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741343081] [2024-11-23 23:56:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741343081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:26,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:26,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:56:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740928166] [2024-11-23 23:56:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:26,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:56:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:26,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:56:26,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:56:26,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-23 23:56:26,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 113 transitions, 947 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:26,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:26,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-23 23:56:26,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:28,154 INFO L124 PetriNetUnfolderBase]: 7229/10795 cut-off events. [2024-11-23 23:56:28,154 INFO L125 PetriNetUnfolderBase]: For 50247/51703 co-relation queries the response was YES. [2024-11-23 23:56:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46933 conditions, 10795 events. 7229/10795 cut-off events. For 50247/51703 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 59510 event pairs, 1752 based on Foata normal form. 99/10733 useless extension candidates. Maximal degree in co-relation 38000. Up to 9140 conditions per place. [2024-11-23 23:56:28,242 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 127 selfloop transitions, 5 changer transitions 1/145 dead transitions. [2024-11-23 23:56:28,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 145 transitions, 1431 flow [2024-11-23 23:56:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:56:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:56:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-23 23:56:28,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-11-23 23:56:28,244 INFO L175 Difference]: Start difference. First operand has 147 places, 113 transitions, 947 flow. Second operand 3 states and 86 transitions. [2024-11-23 23:56:28,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 145 transitions, 1431 flow [2024-11-23 23:56:28,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1385 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-11-23 23:56:28,323 INFO L231 Difference]: Finished difference. Result has 142 places, 117 transitions, 945 flow [2024-11-23 23:56:28,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=945, PETRI_PLACES=142, PETRI_TRANSITIONS=117} [2024-11-23 23:56:28,324 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-23 23:56:28,324 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 117 transitions, 945 flow [2024-11-23 23:56:28,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:28,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:28,325 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:28,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-23 23:56:28,325 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:28,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -105805124, now seen corresponding path program 3 times [2024-11-23 23:56:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767808279] [2024-11-23 23:56:28,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:56:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:28,348 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:56:28,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-23 23:56:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:28,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767808279] [2024-11-23 23:56:28,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767808279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:28,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475088207] [2024-11-23 23:56:28,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:56:28,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:28,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:28,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:56:28,853 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:56:28,853 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:28,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 23:56:28,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:28,872 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 [2024-11-23 23:56:28,989 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:56:28,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-23 23:56:29,010 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:56:29,010 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 [2024-11-23 23:56:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-23 23:56:29,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:29,500 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 42 treesize of output 38 [2024-11-23 23:56:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-23 23:56:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475088207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:29,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:29,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-23 23:56:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427977951] [2024-11-23 23:56:29,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:29,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:56:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:29,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:56:29,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:56:29,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-23 23:56:29,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 117 transitions, 945 flow. Second operand has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:29,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:29,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-23 23:56:29,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:32,280 INFO L124 PetriNetUnfolderBase]: 8806/12741 cut-off events. [2024-11-23 23:56:32,280 INFO L125 PetriNetUnfolderBase]: For 52824/53652 co-relation queries the response was YES. [2024-11-23 23:56:32,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57067 conditions, 12741 events. 8806/12741 cut-off events. For 52824/53652 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 69246 event pairs, 2885 based on Foata normal form. 200/12778 useless extension candidates. Maximal degree in co-relation 48247. Up to 5871 conditions per place. [2024-11-23 23:56:32,384 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 202 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-11-23 23:56:32,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 237 transitions, 2179 flow [2024-11-23 23:56:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:56:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:56:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-11-23 23:56:32,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-11-23 23:56:32,385 INFO L175 Difference]: Start difference. First operand has 142 places, 117 transitions, 945 flow. Second operand 8 states and 154 transitions. [2024-11-23 23:56:32,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 237 transitions, 2179 flow [2024-11-23 23:56:32,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2168 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:56:32,525 INFO L231 Difference]: Finished difference. Result has 147 places, 117 transitions, 1003 flow [2024-11-23 23:56:32,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=147, PETRI_TRANSITIONS=117} [2024-11-23 23:56:32,525 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-11-23 23:56:32,525 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 117 transitions, 1003 flow [2024-11-23 23:56:32,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:32,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:32,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:32,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:56:32,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-23 23:56:32,726 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:32,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -609665983, now seen corresponding path program 1 times [2024-11-23 23:56:32,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:32,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234657152] [2024-11-23 23:56:32,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:56:32,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:32,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234657152] [2024-11-23 23:56:32,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234657152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:32,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:32,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:56:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553099684] [2024-11-23 23:56:32,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:32,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:56:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:32,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:56:32,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:56:32,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:32,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 117 transitions, 1003 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:32,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:32,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:32,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:34,970 INFO L124 PetriNetUnfolderBase]: 8191/11802 cut-off events. [2024-11-23 23:56:34,970 INFO L125 PetriNetUnfolderBase]: For 73860/75827 co-relation queries the response was YES. [2024-11-23 23:56:35,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55914 conditions, 11802 events. 8191/11802 cut-off events. For 73860/75827 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 62342 event pairs, 2347 based on Foata normal form. 535/11876 useless extension candidates. Maximal degree in co-relation 46334. Up to 6376 conditions per place. [2024-11-23 23:56:35,069 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 131 selfloop transitions, 19 changer transitions 0/156 dead transitions. [2024-11-23 23:56:35,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 156 transitions, 1689 flow [2024-11-23 23:56:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:56:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:56:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-23 23:56:35,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-11-23 23:56:35,070 INFO L175 Difference]: Start difference. First operand has 147 places, 117 transitions, 1003 flow. Second operand 4 states and 91 transitions. [2024-11-23 23:56:35,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 156 transitions, 1689 flow [2024-11-23 23:56:35,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 156 transitions, 1617 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-23 23:56:35,160 INFO L231 Difference]: Finished difference. Result has 142 places, 113 transitions, 968 flow [2024-11-23 23:56:35,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=968, PETRI_PLACES=142, PETRI_TRANSITIONS=113} [2024-11-23 23:56:35,161 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-23 23:56:35,161 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 113 transitions, 968 flow [2024-11-23 23:56:35,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:35,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:35,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:35,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-23 23:56:35,161 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:35,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:35,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1251195837, now seen corresponding path program 1 times [2024-11-23 23:56:35,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:35,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511976071] [2024-11-23 23:56:35,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:35,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:56:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511976071] [2024-11-23 23:56:35,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511976071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399070080] [2024-11-23 23:56:35,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:35,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:35,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:35,283 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:35,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:56:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:35,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:56:35,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:56:35,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:56:35,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399070080] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:35,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:56:35,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-23 23:56:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534254817] [2024-11-23 23:56:35,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:35,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:56:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:35,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:56:35,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:56:35,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:35,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 113 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:35,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:35,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:35,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:37,154 INFO L124 PetriNetUnfolderBase]: 7672/11318 cut-off events. [2024-11-23 23:56:37,154 INFO L125 PetriNetUnfolderBase]: For 57585/58191 co-relation queries the response was YES. [2024-11-23 23:56:37,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52694 conditions, 11318 events. 7672/11318 cut-off events. For 57585/58191 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 62521 event pairs, 2291 based on Foata normal form. 328/11458 useless extension candidates. Maximal degree in co-relation 43307. Up to 6117 conditions per place. [2024-11-23 23:56:37,233 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 128 selfloop transitions, 13 changer transitions 0/150 dead transitions. [2024-11-23 23:56:37,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 150 transitions, 1497 flow [2024-11-23 23:56:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:56:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:56:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-23 23:56:37,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-11-23 23:56:37,234 INFO L175 Difference]: Start difference. First operand has 142 places, 113 transitions, 968 flow. Second operand 5 states and 105 transitions. [2024-11-23 23:56:37,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 150 transitions, 1497 flow [2024-11-23 23:56:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 150 transitions, 1435 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:56:37,361 INFO L231 Difference]: Finished difference. Result has 142 places, 110 transitions, 924 flow [2024-11-23 23:56:37,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=924, PETRI_PLACES=142, PETRI_TRANSITIONS=110} [2024-11-23 23:56:37,362 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-11-23 23:56:37,362 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 110 transitions, 924 flow [2024-11-23 23:56:37,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:37,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:37,362 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:37,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-23 23:56:37,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:37,563 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:37,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1068756495, now seen corresponding path program 2 times [2024-11-23 23:56:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:37,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890041751] [2024-11-23 23:56:37,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:37,585 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:37,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:56:37,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890041751] [2024-11-23 23:56:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890041751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:37,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723332968] [2024-11-23 23:56:37,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:56:37,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:37,857 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:37,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:56:38,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:56:38,017 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:56:38,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:56:38,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:56:38,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:56:38,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723332968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:56:38,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:56:38,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-23 23:56:38,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609902138] [2024-11-23 23:56:38,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:56:38,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:56:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:38,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:56:38,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:56:38,738 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-23 23:56:38,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 110 transitions, 924 flow. Second operand has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 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) [2024-11-23 23:56:38,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:38,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-23 23:56:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:41,569 INFO L124 PetriNetUnfolderBase]: 10119/14724 cut-off events. [2024-11-23 23:56:41,569 INFO L125 PetriNetUnfolderBase]: For 74290/76010 co-relation queries the response was YES. [2024-11-23 23:56:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67810 conditions, 14724 events. 10119/14724 cut-off events. For 74290/76010 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 82886 event pairs, 4037 based on Foata normal form. 388/14965 useless extension candidates. Maximal degree in co-relation 56698. Up to 5311 conditions per place. [2024-11-23 23:56:41,760 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 199 selfloop transitions, 47 changer transitions 0/258 dead transitions. [2024-11-23 23:56:41,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 2596 flow [2024-11-23 23:56:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:56:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:56:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-11-23 23:56:41,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35515151515151516 [2024-11-23 23:56:41,762 INFO L175 Difference]: Start difference. First operand has 142 places, 110 transitions, 924 flow. Second operand 15 states and 293 transitions. [2024-11-23 23:56:41,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 2596 flow [2024-11-23 23:56:41,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 258 transitions, 2524 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:56:41,988 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1274 flow [2024-11-23 23:56:41,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1274, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-11-23 23:56:41,989 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-11-23 23:56:41,989 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1274 flow [2024-11-23 23:56:41,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.25) internal successors, (318), 24 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) [2024-11-23 23:56:41,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:41,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:56:42,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 23:56:42,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 23:56:42,190 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:56:42,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1887905725, now seen corresponding path program 1 times [2024-11-23 23:56:42,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:42,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506021746] [2024-11-23 23:56:42,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:42,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:56:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506021746] [2024-11-23 23:56:43,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506021746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:56:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204636649] [2024-11-23 23:56:43,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:43,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:56:43,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:43,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:56:43,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:56:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:43,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-23 23:56:43,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:56:43,557 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 [2024-11-23 23:56:43,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-23 23:56:43,683 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:56:43,683 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 [2024-11-23 23:56:43,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 23:56:44,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-23 23:56:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:56:44,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:56:52,911 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-23 23:56:52,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 3054 treesize of output 2144 [2024-11-23 23:56:53,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:56:53,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 921 treesize of output 849 [2024-11-23 23:57:06,381 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-23 23:57:07,402 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:23,455 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:24,224 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:25,762 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:29,934 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:37,049 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:37,051 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:37,396 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:47,136 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:47,342 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:47,725 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:48,437 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:48,492 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:48,679 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-23 23:57:49,527 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 15 treesize of output 9 [2024-11-23 23:57:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204636649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:53,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-23 23:57:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068880284] [2024-11-23 23:57:53,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:53,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:57:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:53,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:57:53,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=653, Unknown=3, NotChecked=0, Total=756 [2024-11-23 23:57:57,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:01,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:05,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:10,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:14,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:18,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:18,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-11-23 23:58:18,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1274 flow. Second operand has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:18,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:18,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-11-23 23:58:18,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:33,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:43,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:48,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:52,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:58:57,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:01,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:05,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:09,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:14,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:18,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:22,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:59:32,457 INFO L124 PetriNetUnfolderBase]: 17365/24397 cut-off events. [2024-11-23 23:59:32,457 INFO L125 PetriNetUnfolderBase]: For 137946/137946 co-relation queries the response was YES. [2024-11-23 23:59:32,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117318 conditions, 24397 events. 17365/24397 cut-off events. For 137946/137946 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 126524 event pairs, 8053 based on Foata normal form. 1/23476 useless extension candidates. Maximal degree in co-relation 98701. Up to 22611 conditions per place. [2024-11-23 23:59:32,882 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 141 selfloop transitions, 44 changer transitions 39/225 dead transitions. [2024-11-23 23:59:32,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 225 transitions, 2358 flow [2024-11-23 23:59:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-23 23:59:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-23 23:59:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 206 transitions. [2024-11-23 23:59:32,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22032085561497325 [2024-11-23 23:59:32,884 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1274 flow. Second operand 17 states and 206 transitions. [2024-11-23 23:59:32,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 225 transitions, 2358 flow [2024-11-23 23:59:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 225 transitions, 2344 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-23 23:59:33,190 INFO L231 Difference]: Finished difference. Result has 181 places, 136 transitions, 1424 flow [2024-11-23 23:59:33,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1424, PETRI_PLACES=181, PETRI_TRANSITIONS=136} [2024-11-23 23:59:33,191 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-11-23 23:59:33,191 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 136 transitions, 1424 flow [2024-11-23 23:59:33,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.607142857142857) internal successors, (185), 28 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:59:33,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:59:33,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:59:33,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 23:59:33,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 23:59:33,392 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:59:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:59:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1898478259, now seen corresponding path program 2 times [2024-11-23 23:59:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:59:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765949460] [2024-11-23 23:59:33,393 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:59:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:59:33,429 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:59:33,429 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:59:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:59:35,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:59:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765949460] [2024-11-23 23:59:35,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765949460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:59:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363672166] [2024-11-23 23:59:35,739 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:59:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:59:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:59:35,742 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:59:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:59:35,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:59:35,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:59:35,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-23 23:59:35,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:59:36,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-23 23:59:38,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:59:38,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 19 [2024-11-23 23:59:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:59:38,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:59:39,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:59:39,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 248 treesize of output 232 [2024-11-23 23:59:41,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:59:41,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 120 [2024-11-23 23:59:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:59:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363672166] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:59:42,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:59:42,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2024-11-23 23:59:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680274916] [2024-11-23 23:59:42,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:59:42,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 23:59:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:59:42,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 23:59:42,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-23 23:59:46,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-23 23:59:46,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 136 transitions, 1424 flow. Second operand has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:59:46,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:59:46,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-23 23:59:46,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:59:56,874 INFO L124 PetriNetUnfolderBase]: 8466/13191 cut-off events. [2024-11-23 23:59:56,875 INFO L125 PetriNetUnfolderBase]: For 85129/87062 co-relation queries the response was YES. [2024-11-23 23:59:56,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63188 conditions, 13191 events. 8466/13191 cut-off events. For 85129/87062 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 81601 event pairs, 4960 based on Foata normal form. 213/13265 useless extension candidates. Maximal degree in co-relation 63129. Up to 11058 conditions per place. [2024-11-23 23:59:57,052 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 136 selfloop transitions, 97 changer transitions 26/272 dead transitions. [2024-11-23 23:59:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3045 flow [2024-11-23 23:59:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:59:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-23 23:59:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 389 transitions. [2024-11-23 23:59:57,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2946969696969697 [2024-11-23 23:59:57,059 INFO L175 Difference]: Start difference. First operand has 181 places, 136 transitions, 1424 flow. Second operand 24 states and 389 transitions. [2024-11-23 23:59:57,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3045 flow [2024-11-23 23:59:57,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2949 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-11-23 23:59:57,288 INFO L231 Difference]: Finished difference. Result has 201 places, 185 transitions, 2156 flow [2024-11-23 23:59:57,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2156, PETRI_PLACES=201, PETRI_TRANSITIONS=185} [2024-11-23 23:59:57,289 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 145 predicate places. [2024-11-23 23:59:57,289 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 185 transitions, 2156 flow [2024-11-23 23:59:57,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.433333333333334) internal successors, (373), 30 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:59:57,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:59:57,289 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:59:57,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-23 23:59:57,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:59:57,490 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-23 23:59:57,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:59:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1185429869, now seen corresponding path program 3 times [2024-11-23 23:59:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:59:57,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377267197] [2024-11-23 23:59:57,495 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:59:57,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:59:57,546 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:59:57,547 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:59:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:59:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:59:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377267197] [2024-11-23 23:59:59,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377267197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:59:59,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280111414] [2024-11-23 23:59:59,350 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:59:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:59:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:59:59,353 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:59:59,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:59:59,493 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:59:59,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:59:59,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 23:59:59,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:00:00,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-24 00:00:01,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:01,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 23 [2024-11-24 00:00:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:01,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:00:02,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:02,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 248 treesize of output 232 [2024-11-24 00:00:03,680 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:00:03,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:03,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 83 [2024-11-24 00:00:03,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:03,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 190 [2024-11-24 00:00:03,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:03,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 134 [2024-11-24 00:00:04,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:04,169 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 369 treesize of output 313 [2024-11-24 00:00:04,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:04,227 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 252 treesize of output 196 [2024-11-24 00:00:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280111414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:00:05,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:00:05,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-24 00:00:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575828508] [2024-11-24 00:00:05,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:00:05,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 00:00:05,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:00:05,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 00:00:05,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-11-24 00:00:09,017 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-24 00:00:09,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 185 transitions, 2156 flow. Second operand has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:00:09,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:00:09,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-24 00:00:09,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:00:19,080 INFO L124 PetriNetUnfolderBase]: 8675/13458 cut-off events. [2024-11-24 00:00:19,080 INFO L125 PetriNetUnfolderBase]: For 105304/107030 co-relation queries the response was YES. [2024-11-24 00:00:19,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70593 conditions, 13458 events. 8675/13458 cut-off events. For 105304/107030 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 83554 event pairs, 3953 based on Foata normal form. 199/13497 useless extension candidates. Maximal degree in co-relation 69288. Up to 11302 conditions per place. [2024-11-24 00:00:19,226 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 172 selfloop transitions, 104 changer transitions 27/316 dead transitions. [2024-11-24 00:00:19,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 316 transitions, 3902 flow [2024-11-24 00:00:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 00:00:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-24 00:00:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 444 transitions. [2024-11-24 00:00:19,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-11-24 00:00:19,228 INFO L175 Difference]: Start difference. First operand has 201 places, 185 transitions, 2156 flow. Second operand 24 states and 444 transitions. [2024-11-24 00:00:19,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 316 transitions, 3902 flow [2024-11-24 00:00:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 316 transitions, 3673 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-11-24 00:00:19,491 INFO L231 Difference]: Finished difference. Result has 224 places, 220 transitions, 2712 flow [2024-11-24 00:00:19,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2712, PETRI_PLACES=224, PETRI_TRANSITIONS=220} [2024-11-24 00:00:19,492 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-11-24 00:00:19,492 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 220 transitions, 2712 flow [2024-11-24 00:00:19,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:00:19,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:00:19,492 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:00:19,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-24 00:00:19,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:00:19,693 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:00:19,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:00:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash 407655071, now seen corresponding path program 4 times [2024-11-24 00:00:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:00:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028934257] [2024-11-24 00:00:19,694 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:00:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:00:19,729 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:00:19,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:00:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:22,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:00:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028934257] [2024-11-24 00:00:22,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028934257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:00:22,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880665752] [2024-11-24 00:00:22,407 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:00:22,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:00:22,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:00:22,409 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:00:22,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 00:00:22,524 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:00:22,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:00:22,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-24 00:00:22,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:00:22,546 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 [2024-11-24 00:00:22,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-24 00:00:22,896 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:00:22,896 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 [2024-11-24 00:00:23,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:00:24,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-24 00:00:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:24,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:00:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:26,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880665752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:00:26,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:00:26,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2024-11-24 00:00:26,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985744302] [2024-11-24 00:00:26,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:00:26,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 00:00:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:00:26,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 00:00:26,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-11-24 00:00:30,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-11-24 00:00:30,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 220 transitions, 2712 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:00:30,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:00:30,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-11-24 00:00:30,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:00:38,896 INFO L124 PetriNetUnfolderBase]: 8661/13400 cut-off events. [2024-11-24 00:00:38,896 INFO L125 PetriNetUnfolderBase]: For 117749/119531 co-relation queries the response was YES. [2024-11-24 00:00:39,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72973 conditions, 13400 events. 8661/13400 cut-off events. For 117749/119531 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 82101 event pairs, 4165 based on Foata normal form. 199/13436 useless extension candidates. Maximal degree in co-relation 72790. Up to 11546 conditions per place. [2024-11-24 00:00:39,074 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 142 selfloop transitions, 71 changer transitions 42/268 dead transitions. [2024-11-24 00:00:39,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 268 transitions, 3578 flow [2024-11-24 00:00:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:00:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:00:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 280 transitions. [2024-11-24 00:00:39,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2994652406417112 [2024-11-24 00:00:39,076 INFO L175 Difference]: Start difference. First operand has 224 places, 220 transitions, 2712 flow. Second operand 17 states and 280 transitions. [2024-11-24 00:00:39,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 268 transitions, 3578 flow [2024-11-24 00:00:39,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 268 transitions, 3390 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-11-24 00:00:39,381 INFO L231 Difference]: Finished difference. Result has 228 places, 209 transitions, 2565 flow [2024-11-24 00:00:39,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2565, PETRI_PLACES=228, PETRI_TRANSITIONS=209} [2024-11-24 00:00:39,382 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 172 predicate places. [2024-11-24 00:00:39,382 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 209 transitions, 2565 flow [2024-11-24 00:00:39,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:00:39,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:00:39,382 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:00:39,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 00:00:39,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-24 00:00:39,583 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:00:39,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:00:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1747052227, now seen corresponding path program 5 times [2024-11-24 00:00:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:00:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003160943] [2024-11-24 00:00:39,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:00:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:00:39,613 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:00:39,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:00:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:42,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:00:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003160943] [2024-11-24 00:00:42,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003160943] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:00:42,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390154628] [2024-11-24 00:00:42,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:00:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:00:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:00:42,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:00:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 00:00:42,613 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:00:42,614 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:00:42,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:00:42,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:00:42,629 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 [2024-11-24 00:00:42,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-24 00:00:43,131 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:00:43,131 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 [2024-11-24 00:00:43,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:00:44,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-24 00:00:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:00:44,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:00:55,220 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-24 00:00:55,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1530 treesize of output 1100 [2024-11-24 00:00:55,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:00:55,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 694 treesize of output 642 [2024-11-24 00:01:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:01:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390154628] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:01:04,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:01:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-24 00:01:04,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262142866] [2024-11-24 00:01:04,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:01:04,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:01:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:01:04,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:01:04,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=717, Unknown=3, NotChecked=0, Total=812 [2024-11-24 00:01:08,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:14,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:18,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:23,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:29,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:34,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:34,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 55 [2024-11-24 00:01:34,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 209 transitions, 2565 flow. Second operand has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:01:34,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:01:34,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 55 [2024-11-24 00:01:34,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:01:47,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:51,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:01:55,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:02:05,720 INFO L124 PetriNetUnfolderBase]: 18444/26150 cut-off events. [2024-11-24 00:02:05,721 INFO L125 PetriNetUnfolderBase]: For 191211/191211 co-relation queries the response was YES. [2024-11-24 00:02:05,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138689 conditions, 26150 events. 18444/26150 cut-off events. For 191211/191211 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 140924 event pairs, 9027 based on Foata normal form. 1/25149 useless extension candidates. Maximal degree in co-relation 138590. Up to 24049 conditions per place. [2024-11-24 00:02:06,052 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 173 selfloop transitions, 65 changer transitions 46/285 dead transitions. [2024-11-24 00:02:06,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 285 transitions, 3736 flow [2024-11-24 00:02:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:02:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:02:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 193 transitions. [2024-11-24 00:02:06,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20641711229946524 [2024-11-24 00:02:06,054 INFO L175 Difference]: Start difference. First operand has 228 places, 209 transitions, 2565 flow. Second operand 17 states and 193 transitions. [2024-11-24 00:02:06,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 285 transitions, 3736 flow [2024-11-24 00:02:06,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 285 transitions, 3454 flow, removed 20 selfloop flow, removed 23 redundant places. [2024-11-24 00:02:06,779 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 2399 flow [2024-11-24 00:02:06,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2399, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2024-11-24 00:02:06,780 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 165 predicate places. [2024-11-24 00:02:06,780 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 2399 flow [2024-11-24 00:02:06,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.586206896551724) internal successors, (191), 29 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:06,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:02:06,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:02:06,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-24 00:02:06,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-24 00:02:06,981 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:02:06,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:02:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1666904393, now seen corresponding path program 6 times [2024-11-24 00:02:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:02:06,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735527838] [2024-11-24 00:02:06,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:02:06,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:02:07,018 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-24 00:02:07,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:02:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:02:08,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:02:08,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735527838] [2024-11-24 00:02:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735527838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:02:08,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:02:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 00:02:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427811152] [2024-11-24 00:02:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:02:08,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:02:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:02:08,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:02:08,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:02:09,199 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-11-24 00:02:09,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 2399 flow. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:09,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:02:09,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-11-24 00:02:09,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:02:15,927 INFO L124 PetriNetUnfolderBase]: 9363/14650 cut-off events. [2024-11-24 00:02:15,927 INFO L125 PetriNetUnfolderBase]: For 122325/124245 co-relation queries the response was YES. [2024-11-24 00:02:16,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79427 conditions, 14650 events. 9363/14650 cut-off events. For 122325/124245 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 93621 event pairs, 3303 based on Foata normal form. 235/14734 useless extension candidates. Maximal degree in co-relation 79372. Up to 11768 conditions per place. [2024-11-24 00:02:16,088 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 221 selfloop transitions, 105 changer transitions 14/353 dead transitions. [2024-11-24 00:02:16,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 353 transitions, 4380 flow [2024-11-24 00:02:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 00:02:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-24 00:02:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 349 transitions. [2024-11-24 00:02:16,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-11-24 00:02:16,090 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 2399 flow. Second operand 18 states and 349 transitions. [2024-11-24 00:02:16,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 353 transitions, 4380 flow [2024-11-24 00:02:16,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 353 transitions, 4109 flow, removed 31 selfloop flow, removed 17 redundant places. [2024-11-24 00:02:16,546 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 3030 flow [2024-11-24 00:02:16,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3030, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-11-24 00:02:16,546 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 164 predicate places. [2024-11-24 00:02:16,547 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 3030 flow [2024-11-24 00:02:16,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:16,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:02:16,547 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:02:16,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-24 00:02:16,547 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:02:16,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:02:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2032262389, now seen corresponding path program 7 times [2024-11-24 00:02:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:02:16,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500456592] [2024-11-24 00:02:16,548 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:02:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:02:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:02:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:02:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:02:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500456592] [2024-11-24 00:02:18,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500456592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:02:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978929147] [2024-11-24 00:02:18,704 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:02:18,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:02:18,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:02:18,707 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:02:18,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 00:02:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:02:18,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-24 00:02:18,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:02:19,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-24 00:02:20,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:02:20,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 23 [2024-11-24 00:02:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:02:20,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:02:22,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:02:22,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 248 treesize of output 232 [2024-11-24 00:02:24,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:02:24,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 182 [2024-11-24 00:02:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:02:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978929147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:02:25,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:02:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-24 00:02:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414500305] [2024-11-24 00:02:25,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:02:25,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:02:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:02:25,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:02:25,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:02:29,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-24 00:02:29,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 3030 flow. Second operand has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:29,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:02:29,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-24 00:02:29,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:02:42,176 INFO L124 PetriNetUnfolderBase]: 13411/20007 cut-off events. [2024-11-24 00:02:42,176 INFO L125 PetriNetUnfolderBase]: For 202690/205812 co-relation queries the response was YES. [2024-11-24 00:02:42,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113553 conditions, 20007 events. 13411/20007 cut-off events. For 202690/205812 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 122614 event pairs, 5220 based on Foata normal form. 251/19423 useless extension candidates. Maximal degree in co-relation 113496. Up to 16255 conditions per place. [2024-11-24 00:02:42,390 INFO L140 encePairwiseOnDemand]: 39/55 looper letters, 248 selfloop transitions, 147 changer transitions 62/462 dead transitions. [2024-11-24 00:02:42,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 462 transitions, 6198 flow [2024-11-24 00:02:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-24 00:02:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-24 00:02:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 490 transitions. [2024-11-24 00:02:42,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-11-24 00:02:42,392 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 3030 flow. Second operand 28 states and 490 transitions. [2024-11-24 00:02:42,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 462 transitions, 6198 flow [2024-11-24 00:02:43,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 462 transitions, 5837 flow, removed 124 selfloop flow, removed 6 redundant places. [2024-11-24 00:02:43,031 INFO L231 Difference]: Finished difference. Result has 247 places, 274 transitions, 3507 flow [2024-11-24 00:02:43,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3507, PETRI_PLACES=247, PETRI_TRANSITIONS=274} [2024-11-24 00:02:43,032 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 191 predicate places. [2024-11-24 00:02:43,032 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 274 transitions, 3507 flow [2024-11-24 00:02:43,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.517241379310345) internal successors, (392), 29 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:43,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:02:43,033 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:02:43,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-24 00:02:43,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-24 00:02:43,233 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:02:43,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:02:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120397, now seen corresponding path program 3 times [2024-11-24 00:02:43,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:02:43,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735822958] [2024-11-24 00:02:43,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:02:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:02:43,249 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:02:43,250 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:02:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-24 00:02:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:02:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735822958] [2024-11-24 00:02:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735822958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:02:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376453553] [2024-11-24 00:02:43,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:02:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:02:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:02:43,955 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:02:43,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 00:02:44,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:02:44,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:02:44,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 00:02:44,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:02:44,227 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 [2024-11-24 00:02:44,670 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:02:44,670 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 [2024-11-24 00:02:44,695 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 18 treesize of output 13 [2024-11-24 00:02:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-24 00:02:45,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:02:48,233 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 72 treesize of output 68 [2024-11-24 00:02:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-24 00:02:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376453553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:02:49,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:02:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-24 00:02:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982981267] [2024-11-24 00:02:49,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:02:49,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 00:02:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:02:49,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 00:02:49,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:02:52,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-24 00:02:52,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 274 transitions, 3507 flow. Second operand has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:02:52,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:02:52,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-24 00:02:52,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:03:00,273 INFO L124 PetriNetUnfolderBase]: 12193/18292 cut-off events. [2024-11-24 00:03:00,273 INFO L125 PetriNetUnfolderBase]: For 188783/190951 co-relation queries the response was YES. [2024-11-24 00:03:00,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107485 conditions, 18292 events. 12193/18292 cut-off events. For 188783/190951 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 114625 event pairs, 2333 based on Foata normal form. 416/18571 useless extension candidates. Maximal degree in co-relation 107426. Up to 5936 conditions per place. [2024-11-24 00:03:00,484 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 372 selfloop transitions, 44 changer transitions 0/426 dead transitions. [2024-11-24 00:03:00,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 426 transitions, 6031 flow [2024-11-24 00:03:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:03:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:03:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-11-24 00:03:00,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3373737373737374 [2024-11-24 00:03:00,486 INFO L175 Difference]: Start difference. First operand has 247 places, 274 transitions, 3507 flow. Second operand 9 states and 167 transitions. [2024-11-24 00:03:00,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 426 transitions, 6031 flow [2024-11-24 00:03:01,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 426 transitions, 5259 flow, removed 169 selfloop flow, removed 24 redundant places. [2024-11-24 00:03:01,644 INFO L231 Difference]: Finished difference. Result has 202 places, 275 transitions, 3065 flow [2024-11-24 00:03:01,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3065, PETRI_PLACES=202, PETRI_TRANSITIONS=275} [2024-11-24 00:03:01,645 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-11-24 00:03:01,645 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 275 transitions, 3065 flow [2024-11-24 00:03:01,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:01,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:03:01,645 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:03:01,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 00:03:01,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:03:01,846 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:03:01,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:03:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120395, now seen corresponding path program 1 times [2024-11-24 00:03:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:03:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100781689] [2024-11-24 00:03:01,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:03:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:03:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:03:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 00:03:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:03:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100781689] [2024-11-24 00:03:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100781689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:03:02,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985487975] [2024-11-24 00:03:02,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:03:02,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:03:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:03:02,763 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:03:02,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 00:03:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:03:02,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 00:03:02,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:03:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-24 00:03:04,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:03:05,304 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 24 treesize of output 20 [2024-11-24 00:03:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-24 00:03:05,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985487975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:03:05,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:03:05,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2024-11-24 00:03:05,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368762241] [2024-11-24 00:03:05,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:03:05,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:03:05,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:03:05,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:03:05,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:03:08,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-24 00:03:08,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 275 transitions, 3065 flow. Second operand has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:08,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:03:08,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-24 00:03:08,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:03:26,307 INFO L124 PetriNetUnfolderBase]: 23285/34988 cut-off events. [2024-11-24 00:03:26,308 INFO L125 PetriNetUnfolderBase]: For 291422/293387 co-relation queries the response was YES. [2024-11-24 00:03:26,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194038 conditions, 34988 events. 23285/34988 cut-off events. For 291422/293387 co-relation queries the response was YES. Maximal size of possible extension queue 1222. Compared 241948 event pairs, 4451 based on Foata normal form. 485/35451 useless extension candidates. Maximal degree in co-relation 193991. Up to 9226 conditions per place. [2024-11-24 00:03:26,696 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 925 selfloop transitions, 93 changer transitions 0/1028 dead transitions. [2024-11-24 00:03:26,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1028 transitions, 12882 flow [2024-11-24 00:03:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-24 00:03:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-24 00:03:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 559 transitions. [2024-11-24 00:03:26,698 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37643097643097645 [2024-11-24 00:03:26,698 INFO L175 Difference]: Start difference. First operand has 202 places, 275 transitions, 3065 flow. Second operand 27 states and 559 transitions. [2024-11-24 00:03:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1028 transitions, 12882 flow [2024-11-24 00:03:28,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1028 transitions, 12732 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-24 00:03:28,859 INFO L231 Difference]: Finished difference. Result has 225 places, 312 transitions, 3751 flow [2024-11-24 00:03:28,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3751, PETRI_PLACES=225, PETRI_TRANSITIONS=312} [2024-11-24 00:03:28,860 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-11-24 00:03:28,860 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 312 transitions, 3751 flow [2024-11-24 00:03:28,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:28,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:03:28,860 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:03:28,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-24 00:03:29,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 00:03:29,061 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:03:29,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:03:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 848897785, now seen corresponding path program 8 times [2024-11-24 00:03:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:03:29,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194982021] [2024-11-24 00:03:29,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:03:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:03:29,081 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:03:29,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:03:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:03:29,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:03:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194982021] [2024-11-24 00:03:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194982021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:03:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906186684] [2024-11-24 00:03:29,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:03:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:03:29,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:03:29,350 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:03:29,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 00:03:29,491 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:03:29,491 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:03:29,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:03:29,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:03:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:03:29,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:03:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:03:30,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906186684] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:03:30,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:03:30,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-24 00:03:30,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931371496] [2024-11-24 00:03:30,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:03:30,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:03:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:03:30,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:03:30,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:03:30,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-11-24 00:03:30,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 312 transitions, 3751 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:30,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:03:30,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-11-24 00:03:30,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:03:37,600 INFO L124 PetriNetUnfolderBase]: 23041/34602 cut-off events. [2024-11-24 00:03:37,600 INFO L125 PetriNetUnfolderBase]: For 314198/316420 co-relation queries the response was YES. [2024-11-24 00:03:37,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189536 conditions, 34602 events. 23041/34602 cut-off events. For 314198/316420 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 238701 event pairs, 4309 based on Foata normal form. 1240/35839 useless extension candidates. Maximal degree in co-relation 189486. Up to 13082 conditions per place. [2024-11-24 00:03:37,953 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 358 selfloop transitions, 45 changer transitions 0/415 dead transitions. [2024-11-24 00:03:37,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 415 transitions, 5665 flow [2024-11-24 00:03:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:03:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:03:37,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-11-24 00:03:37,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36623376623376624 [2024-11-24 00:03:37,954 INFO L175 Difference]: Start difference. First operand has 225 places, 312 transitions, 3751 flow. Second operand 7 states and 141 transitions. [2024-11-24 00:03:37,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 415 transitions, 5665 flow [2024-11-24 00:03:40,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 415 transitions, 5572 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-11-24 00:03:40,132 INFO L231 Difference]: Finished difference. Result has 216 places, 305 transitions, 3672 flow [2024-11-24 00:03:40,132 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=216, PETRI_TRANSITIONS=305} [2024-11-24 00:03:40,132 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-11-24 00:03:40,133 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 305 transitions, 3672 flow [2024-11-24 00:03:40,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:40,133 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:03:40,133 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:03:40,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-24 00:03:40,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-24 00:03:40,333 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:03:40,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:03:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash 172001111, now seen corresponding path program 9 times [2024-11-24 00:03:40,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:03:40,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626598579] [2024-11-24 00:03:40,334 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:03:40,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:03:40,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:03:40,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:03:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:03:40,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:03:40,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626598579] [2024-11-24 00:03:40,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626598579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:03:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22558939] [2024-11-24 00:03:40,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:03:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:03:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:03:40,801 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:03:40,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 00:03:40,952 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:03:40,952 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:03:40,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:03:40,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:03:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:03:41,659 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:03:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:03:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22558939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:03:42,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:03:42,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2024-11-24 00:03:42,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405644634] [2024-11-24 00:03:42,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:03:42,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:03:42,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:03:42,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:03:42,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:03:42,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-24 00:03:42,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 305 transitions, 3672 flow. Second operand has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:03:42,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:03:42,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-24 00:03:42,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:04:05,242 INFO L124 PetriNetUnfolderBase]: 53922/77344 cut-off events. [2024-11-24 00:04:05,242 INFO L125 PetriNetUnfolderBase]: For 633019/633019 co-relation queries the response was YES. [2024-11-24 00:04:05,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413764 conditions, 77344 events. 53922/77344 cut-off events. For 633019/633019 co-relation queries the response was YES. Maximal size of possible extension queue 1947. Compared 514568 event pairs, 2941 based on Foata normal form. 0/74264 useless extension candidates. Maximal degree in co-relation 413716. Up to 18731 conditions per place. [2024-11-24 00:04:06,134 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 713 selfloop transitions, 474 changer transitions 0/1188 dead transitions. [2024-11-24 00:04:06,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1188 transitions, 15119 flow [2024-11-24 00:04:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-24 00:04:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-24 00:04:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 605 transitions. [2024-11-24 00:04:06,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-11-24 00:04:06,137 INFO L175 Difference]: Start difference. First operand has 216 places, 305 transitions, 3672 flow. Second operand 34 states and 605 transitions. [2024-11-24 00:04:06,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1188 transitions, 15119 flow [2024-11-24 00:04:19,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1188 transitions, 14791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:04:19,497 INFO L231 Difference]: Finished difference. Result has 266 places, 720 transitions, 9793 flow [2024-11-24 00:04:19,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9793, PETRI_PLACES=266, PETRI_TRANSITIONS=720} [2024-11-24 00:04:19,498 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-11-24 00:04:19,498 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 720 transitions, 9793 flow [2024-11-24 00:04:19,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.894736842105264) internal successors, (226), 19 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:04:19,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:04:19,499 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:19,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-24 00:04:19,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-24 00:04:19,699 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-24 00:04:19,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1021011937, now seen corresponding path program 10 times [2024-11-24 00:04:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:04:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943465659] [2024-11-24 00:04:19,700 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:04:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:04:19,718 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:04:19,718 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:04:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:04:20,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:04:20,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943465659] [2024-11-24 00:04:20,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943465659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:04:20,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832994743] [2024-11-24 00:04:20,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:04:20,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:20,294 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ddb319-83c0-4a84-a350-d74b7221593e/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-24 00:04:20,448 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:04:20,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:04:20,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:04:20,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:04:21,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:04:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:04:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832994743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:04:22,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:04:22,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-24 00:04:22,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307105191] [2024-11-24 00:04:22,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:04:22,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:04:22,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:04:22,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:04:22,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:04:22,294 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2024-11-24 00:04:22,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 720 transitions, 9793 flow. Second operand has 19 states, 19 states have (on average 11.736842105263158) internal successors, (223), 19 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:04:22,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:04:22,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2024-11-24 00:04:22,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand