./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB --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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:16:39,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:16:39,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:16:39,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:16:39,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:16:39,993 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:16:39,994 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:16:39,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:16:39,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:16:39,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:16:39,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:16:39,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:16:39,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:16:39,996 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:16:39,997 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:16:39,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:16:39,998 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:16:39,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:16:39,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:16:39,998 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:16:39,998 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:16:39,999 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:16:40,000 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:16:40,000 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:16:40,000 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:40,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:16:40,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:40,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:16:40,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:16:40,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:16:40,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:16:40,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:16:40,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:16:40,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:16:40,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:16:40,003 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_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-28 03:16:40,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:16:40,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:16:40,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:16:40,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:16:40,348 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:16:40,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-28 03:16:43,391 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/data/5d0779f17/2cefbf001ba64228a480693173993d0e/FLAG128e21f70 [2024-11-28 03:16:43,655 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:16:43,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-28 03:16:43,663 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/data/5d0779f17/2cefbf001ba64228a480693173993d0e/FLAG128e21f70 [2024-11-28 03:16:43,678 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/data/5d0779f17/2cefbf001ba64228a480693173993d0e [2024-11-28 03:16:43,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:16:43,682 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:16:43,684 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:16:43,684 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:16:43,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:16:43,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:43,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97d0cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43, skipping insertion in model container [2024-11-28 03:16:43,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:43,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:16:43,896 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:16:43,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:16:43,908 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:16:43,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:16:43,948 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:16:43,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43 WrapperNode [2024-11-28 03:16:43,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:16:43,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:16:43,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:16:43,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:16:43,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:43,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,009 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 148 [2024-11-28 03:16:44,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:16:44,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:16:44,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:16:44,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:16:44,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,029 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,051 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 03:16:44,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,064 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:16:44,087 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:16:44,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:16:44,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:16:44,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (1/1) ... [2024-11-28 03:16:44,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:44,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:16:44,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:16:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:16:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:16:44,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:16:44,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:16:44,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:16:44,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:16:44,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:16:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:16:44,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:16:44,167 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:16:44,301 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:16:44,303 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:16:44,703 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:16:44,704 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:16:45,050 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:16:45,051 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:16:45,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:45 BoogieIcfgContainer [2024-11-28 03:16:45,051 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:16:45,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:16:45,056 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:16:45,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:16:45,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:16:43" (1/3) ... [2024-11-28 03:16:45,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b79be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:45, skipping insertion in model container [2024-11-28 03:16:45,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:43" (2/3) ... [2024-11-28 03:16:45,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b79be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:45, skipping insertion in model container [2024-11-28 03:16:45,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:45" (3/3) ... [2024-11-28 03:16:45,066 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-28 03:16:45,083 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:16:45,085 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 36 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-28 03:16:45,085 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:16:45,165 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:16:45,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 40 transitions, 94 flow [2024-11-28 03:16:45,261 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2024-11-28 03:16:45,265 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:16:45,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 5/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 75 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 26. Up to 3 conditions per place. [2024-11-28 03:16:45,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 40 transitions, 94 flow [2024-11-28 03:16:45,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 86 flow [2024-11-28 03:16:45,311 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:16:45,330 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;@6a7ddb3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:16:45,331 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-28 03:16:45,339 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:16:45,340 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:16:45,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:45,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:45,340 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:16:45,342 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:45,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:45,347 INFO L85 PathProgramCache]: Analyzing trace with hash 492359, now seen corresponding path program 1 times [2024-11-28 03:16:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626126799] [2024-11-28 03:16:45,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:45,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626126799] [2024-11-28 03:16:45,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626126799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:45,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:45,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:16:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171795589] [2024-11-28 03:16:45,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:45,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:16:45,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:45,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:16:45,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:16:45,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-28 03:16:45,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:45,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:45,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-28 03:16:45,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:45,880 INFO L124 PetriNetUnfolderBase]: 205/396 cut-off events. [2024-11-28 03:16:45,880 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-28 03:16:45,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 396 events. 205/396 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1768 event pairs, 172 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 716. Up to 336 conditions per place. [2024-11-28 03:16:45,891 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-11-28 03:16:45,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 128 flow [2024-11-28 03:16:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:16:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:16:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-11-28 03:16:45,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-28 03:16:45,911 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 86 flow. Second operand 3 states and 57 transitions. [2024-11-28 03:16:45,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 128 flow [2024-11-28 03:16:45,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:16:45,921 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 72 flow [2024-11-28 03:16:45,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-28 03:16:45,929 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2024-11-28 03:16:45,930 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 72 flow [2024-11-28 03:16:45,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:45,930 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:45,930 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:16:45,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:16:45,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:45,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash 492360, now seen corresponding path program 1 times [2024-11-28 03:16:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944972282] [2024-11-28 03:16:45,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:46,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:46,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944972282] [2024-11-28 03:16:46,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944972282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:46,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:46,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:16:46,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401120813] [2024-11-28 03:16:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:46,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:46,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:46,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:46,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:46,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-28 03:16:46,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:46,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:46,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-28 03:16:46,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:46,660 INFO L124 PetriNetUnfolderBase]: 206/399 cut-off events. [2024-11-28 03:16:46,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:46,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 399 events. 206/399 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1773 event pairs, 172 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 736. Up to 341 conditions per place. [2024-11-28 03:16:46,665 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-28 03:16:46,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 140 flow [2024-11-28 03:16:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-28 03:16:46,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-28 03:16:46,685 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 72 flow. Second operand 4 states and 67 transitions. [2024-11-28 03:16:46,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 140 flow [2024-11-28 03:16:46,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:46,687 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 95 flow [2024-11-28 03:16:46,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-28 03:16:46,688 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-11-28 03:16:46,688 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 95 flow [2024-11-28 03:16:46,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:46,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:46,689 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 03:16:46,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:16:46,689 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:46,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash 473173664, now seen corresponding path program 1 times [2024-11-28 03:16:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058874587] [2024-11-28 03:16:46,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:47,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058874587] [2024-11-28 03:16:47,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058874587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273838055] [2024-11-28 03:16:47,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:47,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:16:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:47,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:16:47,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:47,227 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 8 treesize of output 1 [2024-11-28 03:16:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:47,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:47,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273838055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:47,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:47,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:16:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845588122] [2024-11-28 03:16:47,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:47,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:16:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:47,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:16:47,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:16:47,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-28 03:16:47,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:47,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:47,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-28 03:16:47,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:48,018 INFO L124 PetriNetUnfolderBase]: 207/401 cut-off events. [2024-11-28 03:16:48,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:48,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 401 events. 207/401 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1781 event pairs, 172 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 743. Up to 338 conditions per place. [2024-11-28 03:16:48,023 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-11-28 03:16:48,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 167 flow [2024-11-28 03:16:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:16:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:16:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-11-28 03:16:48,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-11-28 03:16:48,029 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 95 flow. Second operand 8 states and 106 transitions. [2024-11-28 03:16:48,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 167 flow [2024-11-28 03:16:48,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:16:48,031 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 120 flow [2024-11-28 03:16:48,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-28 03:16:48,032 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-11-28 03:16:48,032 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 120 flow [2024-11-28 03:16:48,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:48,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:16:48,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:16:48,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 03:16:48,237 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:48,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1785576777, now seen corresponding path program 1 times [2024-11-28 03:16:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:48,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172155597] [2024-11-28 03:16:48,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:48,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:48,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172155597] [2024-11-28 03:16:48,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172155597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:16:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548620771] [2024-11-28 03:16:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:48,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:48,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:48,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:48,374 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-28 03:16:48,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:48,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-28 03:16:48,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:48,482 INFO L124 PetriNetUnfolderBase]: 142/283 cut-off events. [2024-11-28 03:16:48,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:48,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 283 events. 142/283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1110 event pairs, 113 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 518. Up to 231 conditions per place. [2024-11-28 03:16:48,486 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 25 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-11-28 03:16:48,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 172 flow [2024-11-28 03:16:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-11-28 03:16:48,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-28 03:16:48,489 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 120 flow. Second operand 4 states and 62 transitions. [2024-11-28 03:16:48,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 172 flow [2024-11-28 03:16:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 130 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-28 03:16:48,492 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 80 flow [2024-11-28 03:16:48,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-28 03:16:48,494 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-11-28 03:16:48,494 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 80 flow [2024-11-28 03:16:48,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,495 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:48,495 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:16:48,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:16:48,495 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:48,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1785576778, now seen corresponding path program 1 times [2024-11-28 03:16:48,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:48,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448193020] [2024-11-28 03:16:48,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448193020] [2024-11-28 03:16:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448193020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:48,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:16:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746455364] [2024-11-28 03:16:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:48,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:48,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:48,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:48,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:48,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:48,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:48,764 INFO L124 PetriNetUnfolderBase]: 154/316 cut-off events. [2024-11-28 03:16:48,764 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:48,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 316 events. 154/316 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1227 event pairs, 126 based on Foata normal form. 17/275 useless extension candidates. Maximal degree in co-relation 510. Up to 236 conditions per place. [2024-11-28 03:16:48,767 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 26 selfloop transitions, 2 changer transitions 8/41 dead transitions. [2024-11-28 03:16:48,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 168 flow [2024-11-28 03:16:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-28 03:16:48,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-11-28 03:16:48,768 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 80 flow. Second operand 4 states and 79 transitions. [2024-11-28 03:16:48,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 168 flow [2024-11-28 03:16:48,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:48,770 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 88 flow [2024-11-28 03:16:48,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-28 03:16:48,771 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-11-28 03:16:48,771 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 88 flow [2024-11-28 03:16:48,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:48,771 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:48,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:16:48,771 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:48,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash 236540658, now seen corresponding path program 1 times [2024-11-28 03:16:48,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:48,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001241290] [2024-11-28 03:16:48,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:48,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:49,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001241290] [2024-11-28 03:16:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001241290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:49,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:49,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:16:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243029729] [2024-11-28 03:16:49,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:49,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:16:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:49,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:16:49,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:16:49,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:49,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:49,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:49,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:49,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:49,136 INFO L124 PetriNetUnfolderBase]: 88/184 cut-off events. [2024-11-28 03:16:49,136 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-28 03:16:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 184 events. 88/184 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 592 event pairs, 66 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 371. Up to 144 conditions per place. [2024-11-28 03:16:49,138 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-11-28 03:16:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 126 flow [2024-11-28 03:16:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-28 03:16:49,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-11-28 03:16:49,140 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 88 flow. Second operand 4 states and 63 transitions. [2024-11-28 03:16:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 126 flow [2024-11-28 03:16:49,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:49,142 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 78 flow [2024-11-28 03:16:49,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-28 03:16:49,142 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2024-11-28 03:16:49,143 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 78 flow [2024-11-28 03:16:49,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:49,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:49,143 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] [2024-11-28 03:16:49,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:16:49,143 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:49,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1157108721, now seen corresponding path program 1 times [2024-11-28 03:16:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:49,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151804047] [2024-11-28 03:16:49,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:16:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151804047] [2024-11-28 03:16:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151804047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:49,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:49,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:16:49,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384244178] [2024-11-28 03:16:49,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:49,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:16:49,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:49,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:16:49,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:16:49,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-28 03:16:49,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 78 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-11-28 03:16:49,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:49,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-28 03:16:49,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:49,662 INFO L124 PetriNetUnfolderBase]: 230/431 cut-off events. [2024-11-28 03:16:49,663 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-28 03:16:49,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 431 events. 230/431 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1786 event pairs, 63 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 930. Up to 155 conditions per place. [2024-11-28 03:16:49,667 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 10 changer transitions 7/70 dead transitions. [2024-11-28 03:16:49,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 70 transitions, 319 flow [2024-11-28 03:16:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:16:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:16:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-11-28 03:16:49,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-11-28 03:16:49,669 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 78 flow. Second operand 8 states and 127 transitions. [2024-11-28 03:16:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 70 transitions, 319 flow [2024-11-28 03:16:49,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:49,671 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 135 flow [2024-11-28 03:16:49,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=135, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-28 03:16:49,673 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2024-11-28 03:16:49,674 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 135 flow [2024-11-28 03:16:49,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-11-28 03:16:49,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:49,674 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] [2024-11-28 03:16:49,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:16:49,675 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:49,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:49,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1100940927, now seen corresponding path program 2 times [2024-11-28 03:16:49,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:49,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50865658] [2024-11-28 03:16:49,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:49,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:49,693 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:16:49,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:16:49,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:49,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50865658] [2024-11-28 03:16:49,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50865658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:49,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:49,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:16:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026144222] [2024-11-28 03:16:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:49,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:16:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:49,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:16:49,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:16:49,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:49,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:49,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:49,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:49,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:49,837 INFO L124 PetriNetUnfolderBase]: 146/311 cut-off events. [2024-11-28 03:16:49,837 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-28 03:16:49,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 311 events. 146/311 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1182 event pairs, 39 based on Foata normal form. 6/313 useless extension candidates. Maximal degree in co-relation 803. Up to 214 conditions per place. [2024-11-28 03:16:49,840 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 31 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-28 03:16:49,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 216 flow [2024-11-28 03:16:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:16:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:16:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-11-28 03:16:49,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-28 03:16:49,841 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 135 flow. Second operand 3 states and 58 transitions. [2024-11-28 03:16:49,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 216 flow [2024-11-28 03:16:49,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 204 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 03:16:49,844 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 142 flow [2024-11-28 03:16:49,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-28 03:16:49,844 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-11-28 03:16:49,844 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 142 flow [2024-11-28 03:16:49,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:49,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:49,845 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] [2024-11-28 03:16:49,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:16:49,845 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:49,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:49,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1491617532, now seen corresponding path program 1 times [2024-11-28 03:16:49,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:49,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152833393] [2024-11-28 03:16:49,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:49,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:50,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:50,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152833393] [2024-11-28 03:16:50,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152833393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:50,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191200958] [2024-11-28 03:16:50,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:50,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:50,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:50,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:16:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:50,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:16:50,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:50,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191200958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:50,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:50,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 03:16:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925729430] [2024-11-28 03:16:50,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:50,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:16:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:50,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:16:50,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:16:50,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:50,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 142 flow. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:50,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:50,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:50,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:50,653 INFO L124 PetriNetUnfolderBase]: 238/535 cut-off events. [2024-11-28 03:16:50,653 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2024-11-28 03:16:50,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 535 events. 238/535 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2501 event pairs, 137 based on Foata normal form. 24/550 useless extension candidates. Maximal degree in co-relation 837. Up to 248 conditions per place. [2024-11-28 03:16:50,660 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 42 selfloop transitions, 7 changer transitions 4/61 dead transitions. [2024-11-28 03:16:50,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 331 flow [2024-11-28 03:16:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:16:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:16:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-11-28 03:16:50,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-28 03:16:50,661 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 142 flow. Second operand 7 states and 118 transitions. [2024-11-28 03:16:50,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 331 flow [2024-11-28 03:16:50,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 310 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:50,667 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 158 flow [2024-11-28 03:16:50,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-11-28 03:16:50,669 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2024-11-28 03:16:50,669 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 158 flow [2024-11-28 03:16:50,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:50,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:50,671 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:50,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:50,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:16:50,875 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:50,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1141896631, now seen corresponding path program 1 times [2024-11-28 03:16:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387811907] [2024-11-28 03:16:50,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387811907] [2024-11-28 03:16:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387811907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59447597] [2024-11-28 03:16:51,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:51,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:51,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:51,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:16:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:51,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:16:51,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:51,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59447597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:51,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-28 03:16:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241355757] [2024-11-28 03:16:51,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:51,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:16:51,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:51,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:16:51,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:16:51,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:51,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 158 flow. Second operand has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:51,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:51,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:51,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:51,790 INFO L124 PetriNetUnfolderBase]: 176/390 cut-off events. [2024-11-28 03:16:51,790 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-11-28 03:16:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 390 events. 176/390 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1605 event pairs, 52 based on Foata normal form. 5/392 useless extension candidates. Maximal degree in co-relation 801. Up to 214 conditions per place. [2024-11-28 03:16:51,793 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 26 selfloop transitions, 7 changer transitions 19/60 dead transitions. [2024-11-28 03:16:51,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 320 flow [2024-11-28 03:16:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:16:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:16:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-11-28 03:16:51,795 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-11-28 03:16:51,795 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 158 flow. Second operand 9 states and 141 transitions. [2024-11-28 03:16:51,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 320 flow [2024-11-28 03:16:51,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 304 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 03:16:51,802 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 146 flow [2024-11-28 03:16:51,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-11-28 03:16:51,803 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2024-11-28 03:16:51,807 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 146 flow [2024-11-28 03:16:51,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:51,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:51,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:51,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:52,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:52,008 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:52,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash -122145620, now seen corresponding path program 2 times [2024-11-28 03:16:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:52,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323233138] [2024-11-28 03:16:52,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:52,047 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:52,048 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:52,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323233138] [2024-11-28 03:16:52,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323233138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:52,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814508945] [2024-11-28 03:16:52,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:52,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:52,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:52,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:52,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:16:52,690 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:52,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:52,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:16:52,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:53,066 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:16:53,066 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 23 treesize of output 10 [2024-11-28 03:16:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:53,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:53,267 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:16:53,267 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 25 treesize of output 12 [2024-11-28 03:16:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:53,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814508945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:53,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:53,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-28 03:16:53,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950563814] [2024-11-28 03:16:53,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:53,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:16:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:53,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:16:53,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:16:53,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-28 03:16:53,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 146 flow. Second operand has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:53,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:53,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-28 03:16:53,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:54,931 INFO L124 PetriNetUnfolderBase]: 664/1263 cut-off events. [2024-11-28 03:16:54,931 INFO L125 PetriNetUnfolderBase]: For 895/896 co-relation queries the response was YES. [2024-11-28 03:16:54,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 1263 events. 664/1263 cut-off events. For 895/896 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6432 event pairs, 93 based on Foata normal form. 40/1297 useless extension candidates. Maximal degree in co-relation 3259. Up to 304 conditions per place. [2024-11-28 03:16:54,941 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/172 dead transitions. [2024-11-28 03:16:54,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 172 transitions, 976 flow [2024-11-28 03:16:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:16:54,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:16:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 306 transitions. [2024-11-28 03:16:54,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-28 03:16:54,944 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 146 flow. Second operand 18 states and 306 transitions. [2024-11-28 03:16:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 172 transitions, 976 flow [2024-11-28 03:16:54,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 172 transitions, 920 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-11-28 03:16:54,951 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 466 flow [2024-11-28 03:16:54,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=466, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-11-28 03:16:54,952 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 30 predicate places. [2024-11-28 03:16:54,952 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 466 flow [2024-11-28 03:16:54,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:54,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:54,953 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:54,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:55,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:55,157 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:55,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1856666408, now seen corresponding path program 3 times [2024-11-28 03:16:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000788405] [2024-11-28 03:16:55,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:16:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:55,179 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:16:55,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:16:55,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:55,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000788405] [2024-11-28 03:16:55,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000788405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:55,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:55,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:16:55,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441474400] [2024-11-28 03:16:55,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:55,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:16:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:55,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:16:55,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:16:55,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-28 03:16:55,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-11-28 03:16:55,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:55,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-28 03:16:55,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:55,791 INFO L124 PetriNetUnfolderBase]: 774/1480 cut-off events. [2024-11-28 03:16:55,792 INFO L125 PetriNetUnfolderBase]: For 4112/4112 co-relation queries the response was YES. [2024-11-28 03:16:55,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 1480 events. 774/1480 cut-off events. For 4112/4112 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7873 event pairs, 110 based on Foata normal form. 32/1505 useless extension candidates. Maximal degree in co-relation 3985. Up to 456 conditions per place. [2024-11-28 03:16:55,806 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 88 selfloop transitions, 24 changer transitions 2/120 dead transitions. [2024-11-28 03:16:55,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 923 flow [2024-11-28 03:16:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:16:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:16:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-11-28 03:16:55,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 03:16:55,808 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 466 flow. Second operand 6 states and 108 transitions. [2024-11-28 03:16:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 923 flow [2024-11-28 03:16:55,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 869 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:55,830 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 577 flow [2024-11-28 03:16:55,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-11-28 03:16:55,832 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2024-11-28 03:16:55,833 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 577 flow [2024-11-28 03:16:55,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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) [2024-11-28 03:16:55,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:55,833 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:55,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 03:16:55,835 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:55,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1006969274, now seen corresponding path program 4 times [2024-11-28 03:16:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:55,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122925256] [2024-11-28 03:16:55,836 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:16:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:55,875 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:16:55,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:16:55,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122925256] [2024-11-28 03:16:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122925256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:55,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:16:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991535418] [2024-11-28 03:16:55,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:55,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:16:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:55,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:16:55,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:16:55,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-28 03:16:55,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 577 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:55,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:55,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-28 03:16:55,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:56,311 INFO L124 PetriNetUnfolderBase]: 629/1277 cut-off events. [2024-11-28 03:16:56,312 INFO L125 PetriNetUnfolderBase]: For 6112/6177 co-relation queries the response was YES. [2024-11-28 03:16:56,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4968 conditions, 1277 events. 629/1277 cut-off events. For 6112/6177 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6666 event pairs, 84 based on Foata normal form. 49/1308 useless extension candidates. Maximal degree in co-relation 3718. Up to 578 conditions per place. [2024-11-28 03:16:56,324 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 91 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-11-28 03:16:56,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 123 transitions, 1057 flow [2024-11-28 03:16:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:16:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:16:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-28 03:16:56,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-11-28 03:16:56,325 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 577 flow. Second operand 5 states and 93 transitions. [2024-11-28 03:16:56,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 123 transitions, 1057 flow [2024-11-28 03:16:56,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 123 transitions, 1014 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:56,348 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 677 flow [2024-11-28 03:16:56,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=677, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-11-28 03:16:56,350 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 38 predicate places. [2024-11-28 03:16:56,350 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 677 flow [2024-11-28 03:16:56,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:56,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:56,350 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] [2024-11-28 03:16:56,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:16:56,351 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:56,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 234725121, now seen corresponding path program 2 times [2024-11-28 03:16:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:56,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705739424] [2024-11-28 03:16:56,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:56,371 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:56,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:16:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705739424] [2024-11-28 03:16:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705739424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:56,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:16:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961256592] [2024-11-28 03:16:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:56,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:56,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:56,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:56,444 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:16:56,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2024-11-28 03:16:56,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:56,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:16:56,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:56,777 INFO L124 PetriNetUnfolderBase]: 695/1515 cut-off events. [2024-11-28 03:16:56,777 INFO L125 PetriNetUnfolderBase]: For 5947/6072 co-relation queries the response was YES. [2024-11-28 03:16:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5859 conditions, 1515 events. 695/1515 cut-off events. For 5947/6072 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9038 event pairs, 126 based on Foata normal form. 51/1498 useless extension candidates. Maximal degree in co-relation 4406. Up to 695 conditions per place. [2024-11-28 03:16:56,790 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 76 selfloop transitions, 25 changer transitions 6/123 dead transitions. [2024-11-28 03:16:56,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1072 flow [2024-11-28 03:16:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-28 03:16:56,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-28 03:16:56,791 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 677 flow. Second operand 4 states and 88 transitions. [2024-11-28 03:16:56,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1072 flow [2024-11-28 03:16:56,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 123 transitions, 1037 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-28 03:16:56,809 INFO L231 Difference]: Finished difference. Result has 78 places, 94 transitions, 840 flow [2024-11-28 03:16:56,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=78, PETRI_TRANSITIONS=94} [2024-11-28 03:16:56,810 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2024-11-28 03:16:56,810 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 94 transitions, 840 flow [2024-11-28 03:16:56,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2024-11-28 03:16:56,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:56,810 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] [2024-11-28 03:16:56,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 03:16:56,810 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:16:56,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:56,811 INFO L85 PathProgramCache]: Analyzing trace with hash 355858824, now seen corresponding path program 1 times [2024-11-28 03:16:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:56,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255570645] [2024-11-28 03:16:56,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255570645] [2024-11-28 03:16:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255570645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882044021] [2024-11-28 03:16:57,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:57,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:57,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:57,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:57,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:16:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:57,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 03:16:57,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:58,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 3 [2024-11-28 03:16:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:58,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:59,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:16:59,044 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 26 treesize of output 18 [2024-11-28 03:16:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:59,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882044021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:59,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:59,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2024-11-28 03:16:59,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893370815] [2024-11-28 03:16:59,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:59,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:16:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:59,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:16:59,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:16:59,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:16:59,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 94 transitions, 840 flow. Second operand has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 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) [2024-11-28 03:16:59,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:59,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:16:59,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:04,929 INFO L124 PetriNetUnfolderBase]: 2731/4696 cut-off events. [2024-11-28 03:17:04,929 INFO L125 PetriNetUnfolderBase]: For 16930/16930 co-relation queries the response was YES. [2024-11-28 03:17:04,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19008 conditions, 4696 events. 2731/4696 cut-off events. For 16930/16930 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 27163 event pairs, 259 based on Foata normal form. 5/4701 useless extension candidates. Maximal degree in co-relation 15026. Up to 1858 conditions per place. [2024-11-28 03:17:04,979 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 242 selfloop transitions, 191 changer transitions 52/486 dead transitions. [2024-11-28 03:17:04,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 486 transitions, 4369 flow [2024-11-28 03:17:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 03:17:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-28 03:17:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 608 transitions. [2024-11-28 03:17:04,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2980392156862745 [2024-11-28 03:17:04,983 INFO L175 Difference]: Start difference. First operand has 78 places, 94 transitions, 840 flow. Second operand 51 states and 608 transitions. [2024-11-28 03:17:04,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 486 transitions, 4369 flow [2024-11-28 03:17:05,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 486 transitions, 4241 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-11-28 03:17:05,113 INFO L231 Difference]: Finished difference. Result has 158 places, 270 transitions, 3261 flow [2024-11-28 03:17:05,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3261, PETRI_PLACES=158, PETRI_TRANSITIONS=270} [2024-11-28 03:17:05,114 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2024-11-28 03:17:05,114 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 270 transitions, 3261 flow [2024-11-28 03:17:05,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 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) [2024-11-28 03:17:05,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:05,115 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] [2024-11-28 03:17:05,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:17:05,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:17:05,319 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:17:05,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -642575154, now seen corresponding path program 2 times [2024-11-28 03:17:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326227403] [2024-11-28 03:17:05,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:05,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:05,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:05,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:06,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:06,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326227403] [2024-11-28 03:17:06,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326227403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:06,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027604235] [2024-11-28 03:17:06,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:06,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:06,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:17:06,799 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:06,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:06,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:17:06,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:07,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:07,276 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 23 treesize of output 15 [2024-11-28 03:17:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:07,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:07,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:07,988 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 26 treesize of output 18 [2024-11-28 03:17:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:08,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027604235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:08,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:08,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-11-28 03:17:08,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263729438] [2024-11-28 03:17:08,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:08,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 03:17:08,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:08,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 03:17:08,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 03:17:08,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:17:08,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 270 transitions, 3261 flow. Second operand has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:08,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:08,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:17:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:19,179 INFO L124 PetriNetUnfolderBase]: 3689/6439 cut-off events. [2024-11-28 03:17:19,179 INFO L125 PetriNetUnfolderBase]: For 54789/54789 co-relation queries the response was YES. [2024-11-28 03:17:19,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35770 conditions, 6439 events. 3689/6439 cut-off events. For 54789/54789 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 41005 event pairs, 244 based on Foata normal form. 112/6551 useless extension candidates. Maximal degree in co-relation 35665. Up to 2148 conditions per place. [2024-11-28 03:17:19,241 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 346 selfloop transitions, 496 changer transitions 139/982 dead transitions. [2024-11-28 03:17:19,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 982 transitions, 11396 flow [2024-11-28 03:17:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-28 03:17:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2024-11-28 03:17:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 1340 transitions. [2024-11-28 03:17:19,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28879310344827586 [2024-11-28 03:17:19,249 INFO L175 Difference]: Start difference. First operand has 158 places, 270 transitions, 3261 flow. Second operand 116 states and 1340 transitions. [2024-11-28 03:17:19,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 982 transitions, 11396 flow [2024-11-28 03:17:19,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 982 transitions, 10927 flow, removed 224 selfloop flow, removed 10 redundant places. [2024-11-28 03:17:19,546 INFO L231 Difference]: Finished difference. Result has 304 places, 592 transitions, 8705 flow [2024-11-28 03:17:19,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=8705, PETRI_PLACES=304, PETRI_TRANSITIONS=592} [2024-11-28 03:17:19,547 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 265 predicate places. [2024-11-28 03:17:19,549 INFO L471 AbstractCegarLoop]: Abstraction has has 304 places, 592 transitions, 8705 flow [2024-11-28 03:17:19,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:19,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:19,549 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] [2024-11-28 03:17:19,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:17:19,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:17:19,750 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:17:19,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1341173772, now seen corresponding path program 3 times [2024-11-28 03:17:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:19,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485641058] [2024-11-28 03:17:19,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:17:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:19,772 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:17:19,772 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:17:20,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:20,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485641058] [2024-11-28 03:17:20,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485641058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:20,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553896573] [2024-11-28 03:17:20,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:17:20,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:20,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:20,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:20,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:17:20,160 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:17:20,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:20,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:17:20,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:17:20,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:20,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:20,531 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 26 treesize of output 18 [2024-11-28 03:17:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:17:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553896573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:20,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:20,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-28 03:17:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574798535] [2024-11-28 03:17:20,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:20,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:17:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:20,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:17:20,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:17:20,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:17:20,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 592 transitions, 8705 flow. Second operand has 23 states, 23 states have (on average 8.173913043478262) internal successors, (188), 23 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:20,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:20,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:17:20,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:23,322 INFO L124 PetriNetUnfolderBase]: 3506/6088 cut-off events. [2024-11-28 03:17:23,322 INFO L125 PetriNetUnfolderBase]: For 97391/97391 co-relation queries the response was YES. [2024-11-28 03:17:23,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42522 conditions, 6088 events. 3506/6088 cut-off events. For 97391/97391 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38060 event pairs, 302 based on Foata normal form. 2/6090 useless extension candidates. Maximal degree in co-relation 42364. Up to 2826 conditions per place. [2024-11-28 03:17:23,406 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 404 selfloop transitions, 342 changer transitions 31/778 dead transitions. [2024-11-28 03:17:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 778 transitions, 12462 flow [2024-11-28 03:17:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:17:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 03:17:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 268 transitions. [2024-11-28 03:17:23,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.319047619047619 [2024-11-28 03:17:23,409 INFO L175 Difference]: Start difference. First operand has 304 places, 592 transitions, 8705 flow. Second operand 21 states and 268 transitions. [2024-11-28 03:17:23,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 778 transitions, 12462 flow [2024-11-28 03:17:24,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 778 transitions, 10446 flow, removed 912 selfloop flow, removed 34 redundant places. [2024-11-28 03:17:24,350 INFO L231 Difference]: Finished difference. Result has 278 places, 657 transitions, 9007 flow [2024-11-28 03:17:24,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7126, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9007, PETRI_PLACES=278, PETRI_TRANSITIONS=657} [2024-11-28 03:17:24,351 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 239 predicate places. [2024-11-28 03:17:24,351 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 657 transitions, 9007 flow [2024-11-28 03:17:24,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.173913043478262) internal successors, (188), 23 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:24,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:24,351 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] [2024-11-28 03:17:24,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:24,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:17:24,552 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:17:24,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1807762960, now seen corresponding path program 4 times [2024-11-28 03:17:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:24,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417244053] [2024-11-28 03:17:24,553 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:17:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:24,579 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:17:24,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:17:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417244053] [2024-11-28 03:17:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417244053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636988426] [2024-11-28 03:17:24,890 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:17:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:24,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:24,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:24,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:17:24,979 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:17:24,979 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:24,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:17:24,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:25,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:25,415 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 23 treesize of output 15 [2024-11-28 03:17:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:25,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:26,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:26,123 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 26 treesize of output 18 [2024-11-28 03:17:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:26,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636988426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:26,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:26,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2024-11-28 03:17:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761635093] [2024-11-28 03:17:26,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:26,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:17:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:26,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:17:26,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:17:26,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:17:26,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 657 transitions, 9007 flow. Second operand has 37 states, 37 states have (on average 8.054054054054054) internal successors, (298), 37 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:26,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:26,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:17:26,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:40,226 INFO L124 PetriNetUnfolderBase]: 6105/10601 cut-off events. [2024-11-28 03:17:40,226 INFO L125 PetriNetUnfolderBase]: For 149330/149330 co-relation queries the response was YES. [2024-11-28 03:17:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70410 conditions, 10601 events. 6105/10601 cut-off events. For 149330/149330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 74374 event pairs, 220 based on Foata normal form. 19/10620 useless extension candidates. Maximal degree in co-relation 70267. Up to 2646 conditions per place. [2024-11-28 03:17:40,351 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 552 selfloop transitions, 1007 changer transitions 121/1681 dead transitions. [2024-11-28 03:17:40,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1681 transitions, 26004 flow [2024-11-28 03:17:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 03:17:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2024-11-28 03:17:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 1595 transitions. [2024-11-28 03:17:40,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3020833333333333 [2024-11-28 03:17:40,357 INFO L175 Difference]: Start difference. First operand has 278 places, 657 transitions, 9007 flow. Second operand 132 states and 1595 transitions. [2024-11-28 03:17:40,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1681 transitions, 26004 flow [2024-11-28 03:17:41,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1681 transitions, 25270 flow, removed 128 selfloop flow, removed 9 redundant places. [2024-11-28 03:17:41,535 INFO L231 Difference]: Finished difference. Result has 440 places, 1205 transitions, 21264 flow [2024-11-28 03:17:41,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=21264, PETRI_PLACES=440, PETRI_TRANSITIONS=1205} [2024-11-28 03:17:41,537 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 401 predicate places. [2024-11-28 03:17:41,537 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1205 transitions, 21264 flow [2024-11-28 03:17:41,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.054054054054054) internal successors, (298), 37 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:41,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:41,537 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] [2024-11-28 03:17:41,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:41,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:17:41,738 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:17:41,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1892064416, now seen corresponding path program 5 times [2024-11-28 03:17:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:41,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727298279] [2024-11-28 03:17:41,739 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:17:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:41,763 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 03:17:41,766 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:17:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727298279] [2024-11-28 03:17:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727298279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422841937] [2024-11-28 03:17:42,066 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:17:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:42,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:42,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:17:42,155 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 03:17:42,155 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:42,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:17:42,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:42,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:42,480 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 23 treesize of output 15 [2024-11-28 03:17:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:42,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:43,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:43,231 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 26 treesize of output 18 [2024-11-28 03:17:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:17:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422841937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:43,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2024-11-28 03:17:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901153780] [2024-11-28 03:17:43,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:43,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 03:17:43,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:43,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 03:17:43,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 03:17:43,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:17:43,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1205 transitions, 21264 flow. Second operand has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:43,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:43,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:17:43,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:55,325 INFO L124 PetriNetUnfolderBase]: 7629/13224 cut-off events. [2024-11-28 03:17:55,325 INFO L125 PetriNetUnfolderBase]: For 364047/364047 co-relation queries the response was YES. [2024-11-28 03:17:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109538 conditions, 13224 events. 7629/13224 cut-off events. For 364047/364047 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 95438 event pairs, 461 based on Foata normal form. 19/13243 useless extension candidates. Maximal degree in co-relation 109218. Up to 5239 conditions per place. [2024-11-28 03:17:55,762 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 821 selfloop transitions, 1076 changer transitions 140/2038 dead transitions. [2024-11-28 03:17:55,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 2038 transitions, 38449 flow [2024-11-28 03:17:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 03:17:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-11-28 03:17:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1175 transitions. [2024-11-28 03:17:55,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29375 [2024-11-28 03:17:55,765 INFO L175 Difference]: Start difference. First operand has 440 places, 1205 transitions, 21264 flow. Second operand 100 states and 1175 transitions. [2024-11-28 03:17:55,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 2038 transitions, 38449 flow [2024-11-28 03:18:01,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 2038 transitions, 35740 flow, removed 1077 selfloop flow, removed 41 redundant places. [2024-11-28 03:18:01,458 INFO L231 Difference]: Finished difference. Result has 523 places, 1621 transitions, 30754 flow [2024-11-28 03:18:01,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=19408, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=30754, PETRI_PLACES=523, PETRI_TRANSITIONS=1621} [2024-11-28 03:18:01,459 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 484 predicate places. [2024-11-28 03:18:01,459 INFO L471 AbstractCegarLoop]: Abstraction has has 523 places, 1621 transitions, 30754 flow [2024-11-28 03:18:01,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.108108108108109) internal successors, (300), 37 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:01,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:01,460 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] [2024-11-28 03:18:01,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:18:01,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:01,664 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:18:01,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1129384602, now seen corresponding path program 6 times [2024-11-28 03:18:01,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:01,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891940509] [2024-11-28 03:18:01,665 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:18:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:01,689 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:18:01,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:18:02,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:02,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891940509] [2024-11-28 03:18:02,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891940509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:02,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968333805] [2024-11-28 03:18:02,387 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:18:02,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:02,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:02,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:18:02,485 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:18:02,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:02,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:18:02,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:02,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 3 [2024-11-28 03:18:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:18:03,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:03,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:03,427 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 26 treesize of output 18 [2024-11-28 03:18:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:18:03,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968333805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:03,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:03,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2024-11-28 03:18:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678409717] [2024-11-28 03:18:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:03,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:18:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:03,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:18:03,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:18:04,083 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:18:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1621 transitions, 30754 flow. Second operand has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 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) [2024-11-28 03:18:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:18:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:12,307 INFO L124 PetriNetUnfolderBase]: 7328/12638 cut-off events. [2024-11-28 03:18:12,307 INFO L125 PetriNetUnfolderBase]: For 476086/476086 co-relation queries the response was YES. [2024-11-28 03:18:12,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115027 conditions, 12638 events. 7328/12638 cut-off events. For 476086/476086 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 89627 event pairs, 570 based on Foata normal form. 3/12641 useless extension candidates. Maximal degree in co-relation 114861. Up to 7182 conditions per place. [2024-11-28 03:18:12,631 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 926 selfloop transitions, 877 changer transitions 58/1862 dead transitions. [2024-11-28 03:18:12,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 1862 transitions, 37424 flow [2024-11-28 03:18:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 03:18:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-28 03:18:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 545 transitions. [2024-11-28 03:18:12,633 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2780612244897959 [2024-11-28 03:18:12,634 INFO L175 Difference]: Start difference. First operand has 523 places, 1621 transitions, 30754 flow. Second operand 49 states and 545 transitions. [2024-11-28 03:18:12,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 1862 transitions, 37424 flow [2024-11-28 03:18:20,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1862 transitions, 36330 flow, removed 501 selfloop flow, removed 24 redundant places. [2024-11-28 03:18:20,281 INFO L231 Difference]: Finished difference. Result has 551 places, 1674 transitions, 33793 flow [2024-11-28 03:18:20,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=29687, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=817, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=33793, PETRI_PLACES=551, PETRI_TRANSITIONS=1674} [2024-11-28 03:18:20,282 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 512 predicate places. [2024-11-28 03:18:20,282 INFO L471 AbstractCegarLoop]: Abstraction has has 551 places, 1674 transitions, 33793 flow [2024-11-28 03:18:20,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.95) internal successors, (318), 40 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) [2024-11-28 03:18:20,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:20,283 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:18:20,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:18:20,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:20,483 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:18:20,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1724889392, now seen corresponding path program 7 times [2024-11-28 03:18:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:20,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116733637] [2024-11-28 03:18:20,484 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:18:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:18:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:18:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116733637] [2024-11-28 03:18:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116733637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693593555] [2024-11-28 03:18:21,867 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:18:21,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:21,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:21,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:18:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:18:21,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 03:18:21,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:18:22,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:22,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:18:22,635 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 26 treesize of output 18 [2024-11-28 03:18:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:18:22,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693593555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:22,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:22,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 33 [2024-11-28 03:18:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795509196] [2024-11-28 03:18:22,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:22,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 03:18:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:22,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 03:18:22,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:18:22,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 40 [2024-11-28 03:18:22,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1674 transitions, 33793 flow. Second operand has 34 states, 34 states have (on average 8.176470588235293) internal successors, (278), 34 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:22,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:22,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 40 [2024-11-28 03:18:22,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:30,396 INFO L124 PetriNetUnfolderBase]: 7386/12728 cut-off events. [2024-11-28 03:18:30,396 INFO L125 PetriNetUnfolderBase]: For 531344/531344 co-relation queries the response was YES. [2024-11-28 03:18:30,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121689 conditions, 12728 events. 7386/12728 cut-off events. For 531344/531344 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 89911 event pairs, 593 based on Foata normal form. 2/12730 useless extension candidates. Maximal degree in co-relation 121426. Up to 6769 conditions per place. [2024-11-28 03:18:30,690 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 979 selfloop transitions, 833 changer transitions 14/1827 dead transitions. [2024-11-28 03:18:30,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1827 transitions, 39578 flow [2024-11-28 03:18:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:18:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:18:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 331 transitions. [2024-11-28 03:18:30,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30648148148148147 [2024-11-28 03:18:30,691 INFO L175 Difference]: Start difference. First operand has 551 places, 1674 transitions, 33793 flow. Second operand 27 states and 331 transitions. [2024-11-28 03:18:30,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1827 transitions, 39578 flow [2024-11-28 03:18:38,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 1827 transitions, 39385 flow, removed 47 selfloop flow, removed 28 redundant places. [2024-11-28 03:18:38,147 INFO L231 Difference]: Finished difference. Result has 538 places, 1698 transitions, 36461 flow [2024-11-28 03:18:38,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=33661, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=36461, PETRI_PLACES=538, PETRI_TRANSITIONS=1698} [2024-11-28 03:18:38,148 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 499 predicate places. [2024-11-28 03:18:38,149 INFO L471 AbstractCegarLoop]: Abstraction has has 538 places, 1698 transitions, 36461 flow [2024-11-28 03:18:38,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.176470588235293) internal successors, (278), 34 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:38,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:38,149 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:18:38,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:18:38,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:18:38,350 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:18:38,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash -71555658, now seen corresponding path program 8 times [2024-11-28 03:18:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503470784] [2024-11-28 03:18:38,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:18:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:38,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:18:38,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:18:38,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503470784] [2024-11-28 03:18:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503470784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:18:38,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:18:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 03:18:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886433667] [2024-11-28 03:18:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:18:38,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:18:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:38,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:18:38,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:18:38,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:18:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1698 transitions, 36461 flow. Second operand has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 12 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:38,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:38,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:18:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:18:46,393 INFO L124 PetriNetUnfolderBase]: 6585/11838 cut-off events. [2024-11-28 03:18:46,393 INFO L125 PetriNetUnfolderBase]: For 530483/530589 co-relation queries the response was YES. [2024-11-28 03:18:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119971 conditions, 11838 events. 6585/11838 cut-off events. For 530483/530589 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 87508 event pairs, 732 based on Foata normal form. 11/11812 useless extension candidates. Maximal degree in co-relation 119734. Up to 10198 conditions per place. [2024-11-28 03:18:46,620 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 1444 selfloop transitions, 36 changer transitions 18/1732 dead transitions. [2024-11-28 03:18:46,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1732 transitions, 39847 flow [2024-11-28 03:18:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:18:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:18:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-11-28 03:18:46,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32083333333333336 [2024-11-28 03:18:46,621 INFO L175 Difference]: Start difference. First operand has 538 places, 1698 transitions, 36461 flow. Second operand 12 states and 154 transitions. [2024-11-28 03:18:46,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1732 transitions, 39847 flow [2024-11-28 03:18:54,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1732 transitions, 39249 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-11-28 03:18:54,153 INFO L231 Difference]: Finished difference. Result has 541 places, 1695 transitions, 35917 flow [2024-11-28 03:18:54,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=35897, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=35917, PETRI_PLACES=541, PETRI_TRANSITIONS=1695} [2024-11-28 03:18:54,155 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 502 predicate places. [2024-11-28 03:18:54,155 INFO L471 AbstractCegarLoop]: Abstraction has has 541 places, 1695 transitions, 35917 flow [2024-11-28 03:18:54,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 12 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:54,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:18:54,156 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] [2024-11-28 03:18:54,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:18:54,156 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:18:54,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:18:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1658720377, now seen corresponding path program 9 times [2024-11-28 03:18:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:18:54,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775318370] [2024-11-28 03:18:54,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:18:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:18:54,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:18:54,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:18:54,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:18:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775318370] [2024-11-28 03:18:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775318370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:18:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112683679] [2024-11-28 03:18:54,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:18:54,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:18:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:18:54,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:18:54,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:18:54,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 03:18:54,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:18:54,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:18:54,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:18:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:18:54,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:18:54,538 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-28 03:18:54,538 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 26 treesize of output 14 [2024-11-28 03:18:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:18:54,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112683679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:18:54,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:18:54,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2024-11-28 03:18:54,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189584531] [2024-11-28 03:18:54,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:18:54,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:18:54,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:18:54,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:18:54,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:18:54,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-28 03:18:54,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1695 transitions, 35917 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:18:54,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:18:54,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-28 03:18:54,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:03,069 INFO L124 PetriNetUnfolderBase]: 8175/14263 cut-off events. [2024-11-28 03:19:03,070 INFO L125 PetriNetUnfolderBase]: For 699080/699112 co-relation queries the response was YES. [2024-11-28 03:19:03,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138333 conditions, 14263 events. 8175/14263 cut-off events. For 699080/699112 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 103111 event pairs, 535 based on Foata normal form. 345/14607 useless extension candidates. Maximal degree in co-relation 138027. Up to 4204 conditions per place. [2024-11-28 03:19:03,340 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 1574 selfloop transitions, 647 changer transitions 15/2365 dead transitions. [2024-11-28 03:19:03,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 2365 transitions, 54225 flow [2024-11-28 03:19:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:19:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:19:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-11-28 03:19:03,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-11-28 03:19:03,341 INFO L175 Difference]: Start difference. First operand has 541 places, 1695 transitions, 35917 flow. Second operand 14 states and 225 transitions. [2024-11-28 03:19:03,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 2365 transitions, 54225 flow [2024-11-28 03:19:10,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 2365 transitions, 53966 flow, removed 69 selfloop flow, removed 11 redundant places. [2024-11-28 03:19:10,536 INFO L231 Difference]: Finished difference. Result has 546 places, 1828 transitions, 42883 flow [2024-11-28 03:19:10,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=35618, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=42883, PETRI_PLACES=546, PETRI_TRANSITIONS=1828} [2024-11-28 03:19:10,538 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 507 predicate places. [2024-11-28 03:19:10,538 INFO L471 AbstractCegarLoop]: Abstraction has has 546 places, 1828 transitions, 42883 flow [2024-11-28 03:19:10,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:10,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:10,539 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:10,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:19:10,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,743 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:19:10,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1079627826, now seen corresponding path program 10 times [2024-11-28 03:19:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:10,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579373262] [2024-11-28 03:19:10,744 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:10,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:10,762 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:10,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:19:10,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:19:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579373262] [2024-11-28 03:19:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579373262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:19:10,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375125964] [2024-11-28 03:19:10,850 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:19:10,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:19:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:19:10,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:19:10,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:19:10,954 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:19:10,954 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:19:10,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:19:10,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:19:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:19:11,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:19:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:19:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375125964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:19:11,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:19:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2024-11-28 03:19:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180703946] [2024-11-28 03:19:11,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:19:11,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:19:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:19:11,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:19:11,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:19:11,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-28 03:19:11,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1828 transitions, 42883 flow. Second operand has 16 states, 16 states have (on average 13.25) internal successors, (212), 16 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) [2024-11-28 03:19:11,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:11,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-28 03:19:11,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:17,822 INFO L124 PetriNetUnfolderBase]: 4739/9690 cut-off events. [2024-11-28 03:19:17,822 INFO L125 PetriNetUnfolderBase]: For 370009/370206 co-relation queries the response was YES. [2024-11-28 03:19:17,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99442 conditions, 9690 events. 4739/9690 cut-off events. For 370009/370206 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 79599 event pairs, 154 based on Foata normal form. 820/10413 useless extension candidates. Maximal degree in co-relation 99259. Up to 2634 conditions per place. [2024-11-28 03:19:18,000 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 198 selfloop transitions, 152 changer transitions 1195/1619 dead transitions. [2024-11-28 03:19:18,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1619 transitions, 35342 flow [2024-11-28 03:19:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:19:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:19:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 322 transitions. [2024-11-28 03:19:18,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-11-28 03:19:18,002 INFO L175 Difference]: Start difference. First operand has 546 places, 1828 transitions, 42883 flow. Second operand 18 states and 322 transitions. [2024-11-28 03:19:18,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1619 transitions, 35342 flow [2024-11-28 03:19:23,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1619 transitions, 34272 flow, removed 212 selfloop flow, removed 24 redundant places. [2024-11-28 03:19:23,441 INFO L231 Difference]: Finished difference. Result has 519 places, 360 transitions, 9322 flow [2024-11-28 03:19:23,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=26876, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9322, PETRI_PLACES=519, PETRI_TRANSITIONS=360} [2024-11-28 03:19:23,443 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 480 predicate places. [2024-11-28 03:19:23,443 INFO L471 AbstractCegarLoop]: Abstraction has has 519 places, 360 transitions, 9322 flow [2024-11-28 03:19:23,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.25) internal successors, (212), 16 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) [2024-11-28 03:19:23,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:19:23,443 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:19:23,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:19:23,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1534b93a-bd6a-4687-a2f4-4b1e411e77a7/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:19:23,644 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-28 03:19:23,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:19:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -550566223, now seen corresponding path program 11 times [2024-11-28 03:19:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:19:23,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87586580] [2024-11-28 03:19:23,644 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:19:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:19:23,665 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 03:19:23,665 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat