./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.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_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1 --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 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:14:05,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:14:05,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 10:14:05,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:14:05,968 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:14:05,988 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:14:05,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:14:05,989 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:14:05,990 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:14:05,990 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:14:05,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:14:05,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:14:05,990 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:14:05,990 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:14:05,990 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:14:05,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 10:14:05,991 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:14:05,992 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:14:05,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:14:05,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:14:05,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:14:05,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:14:05,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:14:05,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:14:05,994 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_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1 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 -> 573af40880ce1d61666f10a2729c7d6ecdb02e81781df2543efcfdd5788ab6d6 [2024-12-02 10:14:06,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:14:06,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:14:06,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:14:06,220 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:14:06,220 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:14:06,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-12-02 10:14:08,943 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/data/ff5162ac6/b64554109d2c4b31983ed889701037e8/FLAG9b3fa2037 [2024-12-02 10:14:09,130 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:14:09,130 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2024-12-02 10:14:09,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/data/ff5162ac6/b64554109d2c4b31983ed889701037e8/FLAG9b3fa2037 [2024-12-02 10:14:09,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/data/ff5162ac6/b64554109d2c4b31983ed889701037e8 [2024-12-02 10:14:09,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:14:09,157 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:14:09,158 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:14:09,158 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:14:09,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:14:09,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28725e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09, skipping insertion in model container [2024-12-02 10:14:09,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:14:09,344 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 10:14:09,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:14:09,356 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:14:09,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:14:09,393 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:14:09,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09 WrapperNode [2024-12-02 10:14:09,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:14:09,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:14:09,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:14:09,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:14:09,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,409 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,427 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 87 [2024-12-02 10:14:09,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:14:09,428 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:14:09,428 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:14:09,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:14:09,437 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,452 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2024-12-02 10:14:09,452 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,460 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:14:09,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:14:09,470 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:14:09,470 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:14:09,471 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (1/1) ... [2024-12-02 10:14:09,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:14:09,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:09,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:14:09,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:14:09,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 10:14:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 10:14:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 10:14:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 10:14:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 10:14:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:14:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:14:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 10:14:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 10:14:09,520 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 10:14:09,609 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:14:09,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:14:09,904 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 10:14:09,905 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:14:10,112 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:14:10,112 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 10:14:10,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:14:10 BoogieIcfgContainer [2024-12-02 10:14:10,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:14:10,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:14:10,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:14:10,119 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:14:10,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:14:09" (1/3) ... [2024-12-02 10:14:10,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f016f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:14:10, skipping insertion in model container [2024-12-02 10:14:10,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:14:09" (2/3) ... [2024-12-02 10:14:10,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f016f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:14:10, skipping insertion in model container [2024-12-02 10:14:10,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:14:10" (3/3) ... [2024-12-02 10:14:10,122 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2024-12-02 10:14:10,137 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:14:10,139 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-max-array.wvr.c that has 4 procedures, 47 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2024-12-02 10:14:10,139 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 10:14:10,198 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 10:14:10,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-12-02 10:14:10,263 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-12-02 10:14:10,265 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 10:14:10,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-12-02 10:14:10,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-12-02 10:14:10,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-12-02 10:14:10,279 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:14:10,290 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;@734fdb61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:14:10,290 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-12-02 10:14:10,294 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 10:14:10,294 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 10:14:10,294 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 10:14:10,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:10,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:14:10,295 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:10,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:10,301 INFO L85 PathProgramCache]: Analyzing trace with hash 491139, now seen corresponding path program 1 times [2024-12-02 10:14:10,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:10,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589925397] [2024-12-02 10:14:10,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:10,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589925397] [2024-12-02 10:14:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589925397] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:10,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 10:14:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622239606] [2024-12-02 10:14:10,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:10,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:14:10,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:10,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:14:10,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:14:10,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:10,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 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) [2024-12-02 10:14:10,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:10,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:10,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:10,876 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-12-02 10:14:10,876 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-12-02 10:14:10,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9884 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-12-02 10:14:10,890 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-12-02 10:14:10,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-12-02 10:14:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:14:10,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:14:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-12-02 10:14:10,900 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-12-02 10:14:10,901 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-12-02 10:14:10,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-12-02 10:14:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 10:14:10,913 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-12-02 10:14:10,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-12-02 10:14:10,918 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-12-02 10:14:10,918 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-12-02 10:14:10,918 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) [2024-12-02 10:14:10,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:10,918 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:14:10,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 10:14:10,919 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:10,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash 491140, now seen corresponding path program 1 times [2024-12-02 10:14:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:10,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521591704] [2024-12-02 10:14:10,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:10,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:11,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:11,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521591704] [2024-12-02 10:14:11,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521591704] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:14:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962712036] [2024-12-02 10:14:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:11,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:14:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:11,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:14:11,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:14:11,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:11,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 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) [2024-12-02 10:14:11,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:11,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:11,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:11,374 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-12-02 10:14:11,374 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 10:14:11,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9820 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-12-02 10:14:11,382 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-12-02 10:14:11,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-12-02 10:14:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:14:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:14:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-12-02 10:14:11,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-12-02 10:14:11,384 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-12-02 10:14:11,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-12-02 10:14:11,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:14:11,386 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-12-02 10:14:11,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-12-02 10:14:11,387 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-12-02 10:14:11,387 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-12-02 10:14:11,387 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) [2024-12-02 10:14:11,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:11,387 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 10:14:11,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 10:14:11,388 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:11,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 472000985, now seen corresponding path program 1 times [2024-12-02 10:14:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:11,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38559742] [2024-12-02 10:14:11,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:11,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38559742] [2024-12-02 10:14:11,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38559742] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939459192] [2024-12-02 10:14:11,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:11,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:11,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:11,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:11,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:14:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:11,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 10:14:11,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:11,777 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 10 treesize of output 9 [2024-12-02 10:14:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:12,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:12,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939459192] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:12,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:12,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 10:14:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972667057] [2024-12-02 10:14:12,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:12,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:14:12,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:12,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:14:12,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:14:12,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:12,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 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) [2024-12-02 10:14:12,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:12,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:12,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:12,638 INFO L124 PetriNetUnfolderBase]: 1318/1935 cut-off events. [2024-12-02 10:14:12,638 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-12-02 10:14:12,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1935 events. 1318/1935 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9870 event pairs, 1060 based on Foata normal form. 0/1380 useless extension candidates. Maximal degree in co-relation 3850. Up to 1879 conditions per place. [2024-12-02 10:14:12,648 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2024-12-02 10:14:12,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2024-12-02 10:14:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:14:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:14:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-12-02 10:14:12,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-12-02 10:14:12,651 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2024-12-02 10:14:12,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2024-12-02 10:14:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:14:12,652 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2024-12-02 10:14:12,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-12-02 10:14:12,653 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-12-02 10:14:12,653 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2024-12-02 10:14:12,653 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) [2024-12-02 10:14:12,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:12,654 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:14:12,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:14:12,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:12,854 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:12,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:12,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1749920922, now seen corresponding path program 1 times [2024-12-02 10:14:12,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:12,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489042244] [2024-12-02 10:14:12,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489042244] [2024-12-02 10:14:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489042244] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:12,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:12,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:14:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607657632] [2024-12-02 10:14:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:12,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:14:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:12,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:14:12,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:14:12,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:12,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 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) [2024-12-02 10:14:12,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:12,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:12,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:13,090 INFO L124 PetriNetUnfolderBase]: 794/1180 cut-off events. [2024-12-02 10:14:13,090 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 10:14:13,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2380 conditions, 1180 events. 794/1180 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5320 event pairs, 608 based on Foata normal form. 0/964 useless extension candidates. Maximal degree in co-relation 2342. Up to 1136 conditions per place. [2024-12-02 10:14:13,096 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2024-12-02 10:14:13,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2024-12-02 10:14:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:14:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:14:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-12-02 10:14:13,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-12-02 10:14:13,097 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2024-12-02 10:14:13,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2024-12-02 10:14:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-12-02 10:14:13,099 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2024-12-02 10:14:13,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-12-02 10:14:13,100 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-12-02 10:14:13,100 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2024-12-02 10:14:13,101 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) [2024-12-02 10:14:13,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:13,101 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:14:13,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 10:14:13,101 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:13,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1749920923, now seen corresponding path program 1 times [2024-12-02 10:14:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:13,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558161778] [2024-12-02 10:14:13,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:13,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:14:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558161778] [2024-12-02 10:14:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558161778] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:13,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:13,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:14:13,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496976881] [2024-12-02 10:14:13,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:13,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:14:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:13,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:14:13,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:14:13,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:13,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:13,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:13,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:13,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:13,321 INFO L124 PetriNetUnfolderBase]: 793/1179 cut-off events. [2024-12-02 10:14:13,321 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 10:14:13,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1179 events. 793/1179 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5328 event pairs, 608 based on Foata normal form. 1/966 useless extension candidates. Maximal degree in co-relation 2334. Up to 1141 conditions per place. [2024-12-02 10:14:13,327 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-12-02 10:14:13,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2024-12-02 10:14:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:14:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:14:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-12-02 10:14:13,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-12-02 10:14:13,329 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 3 states and 62 transitions. [2024-12-02 10:14:13,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2024-12-02 10:14:13,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:14:13,330 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 88 flow [2024-12-02 10:14:13,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-12-02 10:14:13,331 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-12-02 10:14:13,331 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 88 flow [2024-12-02 10:14:13,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:13,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:13,331 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:13,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 10:14:13,332 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:13,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash -338311898, now seen corresponding path program 1 times [2024-12-02 10:14:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176907441] [2024-12-02 10:14:13,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:13,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:13,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176907441] [2024-12-02 10:14:13,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176907441] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:13,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400744262] [2024-12-02 10:14:13,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:13,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:13,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:13,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:13,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:14:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:13,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:14:13,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:13,571 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 [2024-12-02 10:14:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:13,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400744262] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:13,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:14:13,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-12-02 10:14:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835231384] [2024-12-02 10:14:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:13,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:14:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:13,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:14:13,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:14:13,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:13,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:13,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:13,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:14,022 INFO L124 PetriNetUnfolderBase]: 1002/1505 cut-off events. [2024-12-02 10:14:14,022 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-12-02 10:14:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1505 events. 1002/1505 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7199 event pairs, 483 based on Foata normal form. 0/1273 useless extension candidates. Maximal degree in co-relation 2951. Up to 926 conditions per place. [2024-12-02 10:14:14,030 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 43 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-12-02 10:14:14,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 226 flow [2024-12-02 10:14:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:14:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:14:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-12-02 10:14:14,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2024-12-02 10:14:14,032 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 88 flow. Second operand 6 states and 109 transitions. [2024-12-02 10:14:14,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 226 flow [2024-12-02 10:14:14,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:14:14,034 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 120 flow [2024-12-02 10:14:14,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-12-02 10:14:14,034 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-12-02 10:14:14,035 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 120 flow [2024-12-02 10:14:14,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:14,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:14,035 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:14,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:14:14,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 10:14:14,236 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:14,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1273018705, now seen corresponding path program 1 times [2024-12-02 10:14:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:14,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144586561] [2024-12-02 10:14:14,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:14,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:14,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144586561] [2024-12-02 10:14:14,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144586561] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:14,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425881712] [2024-12-02 10:14:14,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:14,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:14,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:14:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:14,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:14:14,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:14,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425881712] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:14,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-12-02 10:14:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138070993] [2024-12-02 10:14:14,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:14,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 10:14:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:14,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 10:14:14,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-12-02 10:14:14,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:14,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 120 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:14,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:14,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:14,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:14,913 INFO L124 PetriNetUnfolderBase]: 1728/2519 cut-off events. [2024-12-02 10:14:14,913 INFO L125 PetriNetUnfolderBase]: For 1674/1674 co-relation queries the response was YES. [2024-12-02 10:14:14,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6297 conditions, 2519 events. 1728/2519 cut-off events. For 1674/1674 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11911 event pairs, 1148 based on Foata normal form. 0/2233 useless extension candidates. Maximal degree in co-relation 4243. Up to 1681 conditions per place. [2024-12-02 10:14:14,927 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-12-02 10:14:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 80 transitions, 406 flow [2024-12-02 10:14:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:14:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:14:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-12-02 10:14:14,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-12-02 10:14:14,929 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 120 flow. Second operand 7 states and 135 transitions. [2024-12-02 10:14:14,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 80 transitions, 406 flow [2024-12-02 10:14:14,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:14:14,932 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 145 flow [2024-12-02 10:14:14,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=145, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-12-02 10:14:14,933 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-12-02 10:14:14,933 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 145 flow [2024-12-02 10:14:14,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:14,933 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:14,933 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:14,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:14:15,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 10:14:15,134 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:15,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058172, now seen corresponding path program 1 times [2024-12-02 10:14:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:15,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465684840] [2024-12-02 10:14:15,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:15,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:15,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465684840] [2024-12-02 10:14:15,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465684840] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052036529] [2024-12-02 10:14:15,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:15,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:15,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:14:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:15,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:14:15,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:15,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052036529] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:15,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 10:14:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023848538] [2024-12-02 10:14:15,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:15,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:14:15,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:15,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:14:15,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:14:15,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:15,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 145 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:15,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:15,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:15,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:15,842 INFO L124 PetriNetUnfolderBase]: 1788/2627 cut-off events. [2024-12-02 10:14:15,842 INFO L125 PetriNetUnfolderBase]: For 1629/1713 co-relation queries the response was YES. [2024-12-02 10:14:15,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 2627 events. 1788/2627 cut-off events. For 1629/1713 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12755 event pairs, 1114 based on Foata normal form. 38/2425 useless extension candidates. Maximal degree in co-relation 4637. Up to 1826 conditions per place. [2024-12-02 10:14:15,859 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-12-02 10:14:15,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 445 flow [2024-12-02 10:14:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:14:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:14:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-12-02 10:14:15,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-12-02 10:14:15,861 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 145 flow. Second operand 8 states and 155 transitions. [2024-12-02 10:14:15,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 445 flow [2024-12-02 10:14:15,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 434 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 10:14:15,866 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 195 flow [2024-12-02 10:14:15,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-12-02 10:14:15,866 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-12-02 10:14:15,866 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 195 flow [2024-12-02 10:14:15,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:15,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:15,867 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:15,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:14:16,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:16,067 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:16,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash 625185884, now seen corresponding path program 2 times [2024-12-02 10:14:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446402930] [2024-12-02 10:14:16,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:16,081 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:16,081 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:14:16,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446402930] [2024-12-02 10:14:16,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446402930] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:16,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426736346] [2024-12-02 10:14:16,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:16,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:16,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:16,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:16,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:14:16,301 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:16,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:16,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:14:16,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:16,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:16,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 10:14:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426736346] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:16,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:16,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-12-02 10:14:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736862311] [2024-12-02 10:14:16,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:16,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 10:14:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:16,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 10:14:16,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-12-02 10:14:16,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:16,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 195 flow. Second operand has 16 states, 16 states have (on average 11.125) internal successors, (178), 16 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:16,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:16,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:16,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:17,428 INFO L124 PetriNetUnfolderBase]: 2082/2969 cut-off events. [2024-12-02 10:14:17,428 INFO L125 PetriNetUnfolderBase]: For 4259/4351 co-relation queries the response was YES. [2024-12-02 10:14:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8734 conditions, 2969 events. 2082/2969 cut-off events. For 4259/4351 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13832 event pairs, 468 based on Foata normal form. 0/2665 useless extension candidates. Maximal degree in co-relation 6541. Up to 819 conditions per place. [2024-12-02 10:14:17,444 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 111 selfloop transitions, 13 changer transitions 0/127 dead transitions. [2024-12-02 10:14:17,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 127 transitions, 747 flow [2024-12-02 10:14:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:14:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 10:14:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-12-02 10:14:17,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-12-02 10:14:17,446 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 195 flow. Second operand 11 states and 215 transitions. [2024-12-02 10:14:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 127 transitions, 747 flow [2024-12-02 10:14:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 127 transitions, 732 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-12-02 10:14:17,452 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 222 flow [2024-12-02 10:14:17,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=222, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-12-02 10:14:17,453 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-12-02 10:14:17,453 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 222 flow [2024-12-02 10:14:17,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.125) internal successors, (178), 16 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:17,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:17,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:17,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:14:17,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:17,654 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:17,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:17,654 INFO L85 PathProgramCache]: Analyzing trace with hash -727393789, now seen corresponding path program 1 times [2024-12-02 10:14:17,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:17,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809921281] [2024-12-02 10:14:17,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:17,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809921281] [2024-12-02 10:14:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809921281] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258615133] [2024-12-02 10:14:17,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:17,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:17,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:17,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:14:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:17,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 10:14:17,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:17,918 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 [2024-12-02 10:14:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:18,020 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:14:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258615133] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:18,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:14:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-12-02 10:14:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822980871] [2024-12-02 10:14:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:18,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:14:18,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:18,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:14:18,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:14:18,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:18,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:18,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:18,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:18,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:18,330 INFO L124 PetriNetUnfolderBase]: 2381/3622 cut-off events. [2024-12-02 10:14:18,330 INFO L125 PetriNetUnfolderBase]: For 6060/6168 co-relation queries the response was YES. [2024-12-02 10:14:18,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 3622 events. 2381/3622 cut-off events. For 6060/6168 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18664 event pairs, 1236 based on Foata normal form. 0/3485 useless extension candidates. Maximal degree in co-relation 7938. Up to 2497 conditions per place. [2024-12-02 10:14:18,343 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 62 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-12-02 10:14:18,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 499 flow [2024-12-02 10:14:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:14:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:14:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-12-02 10:14:18,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.376 [2024-12-02 10:14:18,345 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 222 flow. Second operand 5 states and 94 transitions. [2024-12-02 10:14:18,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 499 flow [2024-12-02 10:14:18,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 467 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-12-02 10:14:18,352 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 225 flow [2024-12-02 10:14:18,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-12-02 10:14:18,352 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-12-02 10:14:18,352 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 225 flow [2024-12-02 10:14:18,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:18,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:18,352 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:18,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:14:18,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 10:14:18,553 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:18,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1263890095, now seen corresponding path program 2 times [2024-12-02 10:14:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158543858] [2024-12-02 10:14:18,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:18,563 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:18,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:14:18,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:18,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158543858] [2024-12-02 10:14:18,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158543858] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:18,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845492590] [2024-12-02 10:14:18,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:18,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:18,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:18,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:18,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:14:18,831 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:18,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:18,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:14:18,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:18,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:19,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-12-02 10:14:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845492590] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:19,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 10:14:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109468294] [2024-12-02 10:14:19,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:19,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:14:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:19,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:14:19,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:14:19,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:19,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 225 flow. Second operand has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:19,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:19,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:19,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:20,294 INFO L124 PetriNetUnfolderBase]: 3908/5460 cut-off events. [2024-12-02 10:14:20,294 INFO L125 PetriNetUnfolderBase]: For 5210/5385 co-relation queries the response was YES. [2024-12-02 10:14:20,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17475 conditions, 5460 events. 3908/5460 cut-off events. For 5210/5385 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26470 event pairs, 579 based on Foata normal form. 196/5648 useless extension candidates. Maximal degree in co-relation 13898. Up to 1086 conditions per place. [2024-12-02 10:14:20,315 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 166 selfloop transitions, 18 changer transitions 0/188 dead transitions. [2024-12-02 10:14:20,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 188 transitions, 1113 flow [2024-12-02 10:14:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:14:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 10:14:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-12-02 10:14:20,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2024-12-02 10:14:20,318 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 225 flow. Second operand 14 states and 284 transitions. [2024-12-02 10:14:20,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 188 transitions, 1113 flow [2024-12-02 10:14:20,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 188 transitions, 1080 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:14:20,327 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 289 flow [2024-12-02 10:14:20,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=289, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-12-02 10:14:20,327 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-12-02 10:14:20,327 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 289 flow [2024-12-02 10:14:20,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.9) internal successors, (218), 20 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:20,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:20,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:20,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:14:20,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:20,528 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:20,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1677774127, now seen corresponding path program 1 times [2024-12-02 10:14:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919251667] [2024-12-02 10:14:20,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:20,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919251667] [2024-12-02 10:14:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919251667] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127021310] [2024-12-02 10:14:20,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:20,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:20,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:20,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:14:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:20,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 10:14:20,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:20,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:20,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127021310] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:20,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:20,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 10:14:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872829031] [2024-12-02 10:14:20,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:20,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:14:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:20,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:14:20,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:14:20,881 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:20,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 289 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:20,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:20,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:20,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:21,288 INFO L124 PetriNetUnfolderBase]: 3490/4946 cut-off events. [2024-12-02 10:14:21,288 INFO L125 PetriNetUnfolderBase]: For 13012/13313 co-relation queries the response was YES. [2024-12-02 10:14:21,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17192 conditions, 4946 events. 3490/4946 cut-off events. For 13012/13313 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22873 event pairs, 2241 based on Foata normal form. 34/4950 useless extension candidates. Maximal degree in co-relation 14413. Up to 4047 conditions per place. [2024-12-02 10:14:21,307 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-12-02 10:14:21,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 645 flow [2024-12-02 10:14:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:14:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:14:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-12-02 10:14:21,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-12-02 10:14:21,308 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 289 flow. Second operand 8 states and 146 transitions. [2024-12-02 10:14:21,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 645 flow [2024-12-02 10:14:21,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 560 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-12-02 10:14:21,316 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 293 flow [2024-12-02 10:14:21,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=293, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-12-02 10:14:21,317 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-12-02 10:14:21,317 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 293 flow [2024-12-02 10:14:21,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:21,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:21,317 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:21,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:14:21,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 10:14:21,518 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:21,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 401770150, now seen corresponding path program 2 times [2024-12-02 10:14:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231896543] [2024-12-02 10:14:21,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:21,531 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:21,531 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:14:21,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231896543] [2024-12-02 10:14:21,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231896543] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997848573] [2024-12-02 10:14:21,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:21,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:21,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:21,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:14:21,754 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:21,754 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:21,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 10:14:21,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:21,760 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 [2024-12-02 10:14:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:14:21,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:14:22,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997848573] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:22,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:22,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-12-02 10:14:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27361948] [2024-12-02 10:14:22,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:22,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:14:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:22,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:14:22,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:14:22,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:22,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 293 flow. Second operand has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:22,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:22,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:22,938 INFO L124 PetriNetUnfolderBase]: 3196/4498 cut-off events. [2024-12-02 10:14:22,938 INFO L125 PetriNetUnfolderBase]: For 7437/7665 co-relation queries the response was YES. [2024-12-02 10:14:22,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15044 conditions, 4498 events. 3196/4498 cut-off events. For 7437/7665 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20502 event pairs, 673 based on Foata normal form. 103/4593 useless extension candidates. Maximal degree in co-relation 12315. Up to 1506 conditions per place. [2024-12-02 10:14:22,956 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 106 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2024-12-02 10:14:22,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 893 flow [2024-12-02 10:14:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:14:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:14:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-12-02 10:14:22,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2024-12-02 10:14:22,957 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 293 flow. Second operand 7 states and 128 transitions. [2024-12-02 10:14:22,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 893 flow [2024-12-02 10:14:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 880 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-12-02 10:14:22,964 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 314 flow [2024-12-02 10:14:22,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-12-02 10:14:22,965 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-12-02 10:14:22,965 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 314 flow [2024-12-02 10:14:22,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:22,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:22,965 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] [2024-12-02 10:14:22,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:14:23,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 10:14:23,166 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:23,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1215388462, now seen corresponding path program 1 times [2024-12-02 10:14:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:23,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394093570] [2024-12-02 10:14:23,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:23,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394093570] [2024-12-02 10:14:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394093570] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:23,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:14:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674038449] [2024-12-02 10:14:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:23,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:14:23,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:23,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:14:23,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:14:23,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:23,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:23,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:23,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:23,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:23,630 INFO L124 PetriNetUnfolderBase]: 2704/4071 cut-off events. [2024-12-02 10:14:23,630 INFO L125 PetriNetUnfolderBase]: For 8547/8728 co-relation queries the response was YES. [2024-12-02 10:14:23,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14513 conditions, 4071 events. 2704/4071 cut-off events. For 8547/8728 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19796 event pairs, 632 based on Foata normal form. 2/4050 useless extension candidates. Maximal degree in co-relation 11566. Up to 3332 conditions per place. [2024-12-02 10:14:23,642 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 68 selfloop transitions, 4 changer transitions 1/81 dead transitions. [2024-12-02 10:14:23,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 575 flow [2024-12-02 10:14:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:14:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:14:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-12-02 10:14:23,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-12-02 10:14:23,643 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 314 flow. Second operand 3 states and 74 transitions. [2024-12-02 10:14:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 575 flow [2024-12-02 10:14:23,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 533 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-12-02 10:14:23,654 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 312 flow [2024-12-02 10:14:23,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-12-02 10:14:23,654 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-12-02 10:14:23,654 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 312 flow [2024-12-02 10:14:23,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:23,655 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:23,655 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] [2024-12-02 10:14:23,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 10:14:23,655 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:23,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1749304456, now seen corresponding path program 1 times [2024-12-02 10:14:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157465678] [2024-12-02 10:14:23,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157465678] [2024-12-02 10:14:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157465678] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951252375] [2024-12-02 10:14:23,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:23,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:23,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:23,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:23,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:14:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:23,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 10:14:23,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:23,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:14:23,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951252375] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:23,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:14:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-12-02 10:14:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123482724] [2024-12-02 10:14:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:23,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:14:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:23,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:14:23,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:14:23,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:23,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 312 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:23,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:23,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:23,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:24,167 INFO L124 PetriNetUnfolderBase]: 3264/4723 cut-off events. [2024-12-02 10:14:24,167 INFO L125 PetriNetUnfolderBase]: For 8379/8575 co-relation queries the response was YES. [2024-12-02 10:14:24,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16444 conditions, 4723 events. 3264/4723 cut-off events. For 8379/8575 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22617 event pairs, 956 based on Foata normal form. 142/4768 useless extension candidates. Maximal degree in co-relation 13641. Up to 2677 conditions per place. [2024-12-02 10:14:24,180 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 70 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-12-02 10:14:24,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 589 flow [2024-12-02 10:14:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:14:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:14:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-12-02 10:14:24,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-12-02 10:14:24,181 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 312 flow. Second operand 5 states and 88 transitions. [2024-12-02 10:14:24,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 589 flow [2024-12-02 10:14:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 581 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-12-02 10:14:24,191 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 330 flow [2024-12-02 10:14:24,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-12-02 10:14:24,192 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-12-02 10:14:24,192 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 330 flow [2024-12-02 10:14:24,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:24,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:24,192 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] [2024-12-02 10:14:24,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:14:24,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 10:14:24,393 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:24,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1543074844, now seen corresponding path program 1 times [2024-12-02 10:14:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:24,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56854231] [2024-12-02 10:14:24,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 10:14:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56854231] [2024-12-02 10:14:24,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56854231] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:24,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:24,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:14:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997933270] [2024-12-02 10:14:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:24,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:14:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:24,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:14:24,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:14:24,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:24,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:24,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:24,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:24,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:24,808 INFO L124 PetriNetUnfolderBase]: 2927/4242 cut-off events. [2024-12-02 10:14:24,808 INFO L125 PetriNetUnfolderBase]: For 11543/11767 co-relation queries the response was YES. [2024-12-02 10:14:24,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15482 conditions, 4242 events. 2927/4242 cut-off events. For 11543/11767 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20395 event pairs, 916 based on Foata normal form. 141/4275 useless extension candidates. Maximal degree in co-relation 12971. Up to 2246 conditions per place. [2024-12-02 10:14:24,823 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 67 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-12-02 10:14:24,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 618 flow [2024-12-02 10:14:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:14:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:14:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-12-02 10:14:24,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-12-02 10:14:24,824 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 330 flow. Second operand 4 states and 76 transitions. [2024-12-02 10:14:24,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 618 flow [2024-12-02 10:14:24,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 595 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 10:14:24,841 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 317 flow [2024-12-02 10:14:24,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-12-02 10:14:24,841 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-12-02 10:14:24,842 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 317 flow [2024-12-02 10:14:24,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:24,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:24,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:24,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 10:14:24,842 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:24,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -312957754, now seen corresponding path program 1 times [2024-12-02 10:14:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:24,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057694872] [2024-12-02 10:14:24,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:25,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057694872] [2024-12-02 10:14:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057694872] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476466423] [2024-12-02 10:14:25,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:14:25,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:25,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:25,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:14:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:25,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 10:14:25,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:25,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:25,895 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 85 treesize of output 61 [2024-12-02 10:14:25,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-12-02 10:14:25,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-12-02 10:14:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:25,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:26,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-12-02 10:14:26,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-12-02 10:14:26,756 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 66 treesize of output 58 [2024-12-02 10:14:26,773 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 10:14:26,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-12-02 10:14:26,904 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 72 treesize of output 64 [2024-12-02 10:14:26,915 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 10:14:26,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2024-12-02 10:14:27,071 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 53 treesize of output 47 [2024-12-02 10:14:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 10:14:27,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2024-12-02 10:14:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:27,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476466423] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:27,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:27,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-12-02 10:14:27,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670998020] [2024-12-02 10:14:27,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:27,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 10:14:27,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:27,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 10:14:27,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:14:27,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:27,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 317 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:27,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:27,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:27,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:29,155 INFO L124 PetriNetUnfolderBase]: 2426/3731 cut-off events. [2024-12-02 10:14:29,155 INFO L125 PetriNetUnfolderBase]: For 9153/9338 co-relation queries the response was YES. [2024-12-02 10:14:29,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13868 conditions, 3731 events. 2426/3731 cut-off events. For 9153/9338 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18761 event pairs, 610 based on Foata normal form. 1/3729 useless extension candidates. Maximal degree in co-relation 10700. Up to 2906 conditions per place. [2024-12-02 10:14:29,170 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 74 selfloop transitions, 16 changer transitions 47/146 dead transitions. [2024-12-02 10:14:29,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 146 transitions, 984 flow [2024-12-02 10:14:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 10:14:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 10:14:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-12-02 10:14:29,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-12-02 10:14:29,172 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 317 flow. Second operand 16 states and 284 transitions. [2024-12-02 10:14:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 146 transitions, 984 flow [2024-12-02 10:14:29,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 956 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 10:14:29,189 INFO L231 Difference]: Finished difference. Result has 95 places, 65 transitions, 405 flow [2024-12-02 10:14:29,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=405, PETRI_PLACES=95, PETRI_TRANSITIONS=65} [2024-12-02 10:14:29,189 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-12-02 10:14:29,189 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 65 transitions, 405 flow [2024-12-02 10:14:29,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:29,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:29,190 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:29,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:14:29,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 10:14:29,390 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:29,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1552865248, now seen corresponding path program 2 times [2024-12-02 10:14:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:29,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142645672] [2024-12-02 10:14:29,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:29,405 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:29,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142645672] [2024-12-02 10:14:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142645672] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569143031] [2024-12-02 10:14:29,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:29,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:29,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:29,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:14:29,930 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:29,930 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:29,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 10:14:29,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:29,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:30,252 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 85 treesize of output 61 [2024-12-02 10:14:30,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-12-02 10:14:30,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-12-02 10:14:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:30,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:30,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-12-02 10:14:30,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-12-02 10:14:31,339 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 117 treesize of output 105 [2024-12-02 10:14:31,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:31,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-12-02 10:14:32,131 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 100 treesize of output 92 [2024-12-02 10:14:32,156 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-12-02 10:14:32,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 110 [2024-12-02 10:14:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:32,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569143031] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:32,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-12-02 10:14:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091196812] [2024-12-02 10:14:32,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:32,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 10:14:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:32,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 10:14:32,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-12-02 10:14:32,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:32,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 65 transitions, 405 flow. Second operand has 25 states, 25 states have (on average 11.72) internal successors, (293), 25 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:35,290 INFO L124 PetriNetUnfolderBase]: 3150/4762 cut-off events. [2024-12-02 10:14:35,291 INFO L125 PetriNetUnfolderBase]: For 13449/13560 co-relation queries the response was YES. [2024-12-02 10:14:35,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18238 conditions, 4762 events. 3150/4762 cut-off events. For 13449/13560 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 24267 event pairs, 794 based on Foata normal form. 10/4646 useless extension candidates. Maximal degree in co-relation 18206. Up to 3822 conditions per place. [2024-12-02 10:14:35,306 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 115 selfloop transitions, 67 changer transitions 38/227 dead transitions. [2024-12-02 10:14:35,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 227 transitions, 1766 flow [2024-12-02 10:14:35,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 10:14:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-12-02 10:14:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 482 transitions. [2024-12-02 10:14:35,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30125 [2024-12-02 10:14:35,308 INFO L175 Difference]: Start difference. First operand has 95 places, 65 transitions, 405 flow. Second operand 32 states and 482 transitions. [2024-12-02 10:14:35,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 227 transitions, 1766 flow [2024-12-02 10:14:35,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 227 transitions, 1683 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-12-02 10:14:35,336 INFO L231 Difference]: Finished difference. Result has 129 places, 119 transitions, 1017 flow [2024-12-02 10:14:35,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1017, PETRI_PLACES=129, PETRI_TRANSITIONS=119} [2024-12-02 10:14:35,336 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-12-02 10:14:35,336 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 119 transitions, 1017 flow [2024-12-02 10:14:35,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.72) internal successors, (293), 25 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:35,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:35,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:35,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:14:35,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 10:14:35,537 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:35,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1943279172, now seen corresponding path program 3 times [2024-12-02 10:14:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614193323] [2024-12-02 10:14:35,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:14:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:35,551 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:14:35,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:35,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:35,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614193323] [2024-12-02 10:14:35,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614193323] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:35,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:35,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 10:14:35,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099214248] [2024-12-02 10:14:35,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:35,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:14:35,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:35,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:14:35,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:14:35,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:35,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 119 transitions, 1017 flow. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:35,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:35,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:35,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:36,726 INFO L124 PetriNetUnfolderBase]: 3089/4724 cut-off events. [2024-12-02 10:14:36,726 INFO L125 PetriNetUnfolderBase]: For 18084/18211 co-relation queries the response was YES. [2024-12-02 10:14:36,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20381 conditions, 4724 events. 3089/4724 cut-off events. For 18084/18211 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 24648 event pairs, 817 based on Foata normal form. 12/4610 useless extension candidates. Maximal degree in co-relation 20333. Up to 4042 conditions per place. [2024-12-02 10:14:36,749 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 131 selfloop transitions, 66 changer transitions 13/217 dead transitions. [2024-12-02 10:14:36,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 217 transitions, 2144 flow [2024-12-02 10:14:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:14:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 10:14:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-12-02 10:14:36,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3292307692307692 [2024-12-02 10:14:36,750 INFO L175 Difference]: Start difference. First operand has 129 places, 119 transitions, 1017 flow. Second operand 13 states and 214 transitions. [2024-12-02 10:14:36,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 217 transitions, 2144 flow [2024-12-02 10:14:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 217 transitions, 2000 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-12-02 10:14:36,799 INFO L231 Difference]: Finished difference. Result has 134 places, 158 transitions, 1511 flow [2024-12-02 10:14:36,799 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1511, PETRI_PLACES=134, PETRI_TRANSITIONS=158} [2024-12-02 10:14:36,800 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 82 predicate places. [2024-12-02 10:14:36,800 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 158 transitions, 1511 flow [2024-12-02 10:14:36,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:36,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:36,800 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:36,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 10:14:36,800 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:36,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1709590940, now seen corresponding path program 4 times [2024-12-02 10:14:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217885293] [2024-12-02 10:14:36,801 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:14:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:36,820 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:14:36,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:37,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:37,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217885293] [2024-12-02 10:14:37,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217885293] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:37,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398947077] [2024-12-02 10:14:37,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:14:37,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:37,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:37,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:37,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:14:37,263 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:14:37,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:37,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 10:14:37,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:37,492 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 85 treesize of output 61 [2024-12-02 10:14:37,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-12-02 10:14:37,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-12-02 10:14:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:37,571 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:14:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398947077] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:37,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:14:37,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 17 [2024-12-02 10:14:37,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634811056] [2024-12-02 10:14:37,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:37,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:14:37,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:37,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:14:37,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-12-02 10:14:37,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:37,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 158 transitions, 1511 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:37,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:37,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:37,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:38,264 INFO L124 PetriNetUnfolderBase]: 3147/4815 cut-off events. [2024-12-02 10:14:38,264 INFO L125 PetriNetUnfolderBase]: For 22998/23145 co-relation queries the response was YES. [2024-12-02 10:14:38,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22200 conditions, 4815 events. 3147/4815 cut-off events. For 22998/23145 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25081 event pairs, 1059 based on Foata normal form. 7/4693 useless extension candidates. Maximal degree in co-relation 21929. Up to 4135 conditions per place. [2024-12-02 10:14:38,288 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 127 selfloop transitions, 76 changer transitions 10/220 dead transitions. [2024-12-02 10:14:38,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 220 transitions, 2450 flow [2024-12-02 10:14:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:14:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 10:14:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-12-02 10:14:38,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.342 [2024-12-02 10:14:38,289 INFO L175 Difference]: Start difference. First operand has 134 places, 158 transitions, 1511 flow. Second operand 10 states and 171 transitions. [2024-12-02 10:14:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 220 transitions, 2450 flow [2024-12-02 10:14:38,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 220 transitions, 2360 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-12-02 10:14:38,340 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 1888 flow [2024-12-02 10:14:38,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1888, PETRI_PLACES=143, PETRI_TRANSITIONS=177} [2024-12-02 10:14:38,341 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-12-02 10:14:38,341 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 1888 flow [2024-12-02 10:14:38,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:38,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:38,341 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:38,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:14:38,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:38,542 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:38,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1257650632, now seen corresponding path program 5 times [2024-12-02 10:14:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:38,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048553431] [2024-12-02 10:14:38,542 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:14:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:38,557 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 10:14:38,557 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:39,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048553431] [2024-12-02 10:14:39,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048553431] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:39,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900568670] [2024-12-02 10:14:39,065 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:14:39,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:39,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:39,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:39,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:14:39,133 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-12-02 10:14:39,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:39,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 10:14:39,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:39,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:39,395 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 75 treesize of output 51 [2024-12-02 10:14:39,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-12-02 10:14:39,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-12-02 10:14:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:39,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:39,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2024-12-02 10:14:39,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2024-12-02 10:14:40,774 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 125 treesize of output 113 [2024-12-02 10:14:40,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:40,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 157 [2024-12-02 10:14:42,323 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 101 treesize of output 93 [2024-12-02 10:14:42,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:42,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 119 [2024-12-02 10:14:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900568670] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:42,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:42,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-12-02 10:14:42,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909602346] [2024-12-02 10:14:42,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:42,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 10:14:42,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:42,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 10:14:42,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:14:42,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:43,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 177 transitions, 1888 flow. Second operand has 23 states, 23 states have (on average 11.91304347826087) internal successors, (274), 23 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:43,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:43,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:45,463 INFO L124 PetriNetUnfolderBase]: 3463/5231 cut-off events. [2024-12-02 10:14:45,464 INFO L125 PetriNetUnfolderBase]: For 27224/27463 co-relation queries the response was YES. [2024-12-02 10:14:45,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24774 conditions, 5231 events. 3463/5231 cut-off events. For 27224/27463 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 27398 event pairs, 805 based on Foata normal form. 1/5098 useless extension candidates. Maximal degree in co-relation 24447. Up to 4187 conditions per place. [2024-12-02 10:14:45,528 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 152 selfloop transitions, 65 changer transitions 54/278 dead transitions. [2024-12-02 10:14:45,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 278 transitions, 3279 flow [2024-12-02 10:14:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 10:14:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-12-02 10:14:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 302 transitions. [2024-12-02 10:14:45,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3178947368421053 [2024-12-02 10:14:45,529 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 1888 flow. Second operand 19 states and 302 transitions. [2024-12-02 10:14:45,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 278 transitions, 3279 flow [2024-12-02 10:14:45,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 278 transitions, 3209 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-12-02 10:14:45,578 INFO L231 Difference]: Finished difference. Result has 165 places, 177 transitions, 1986 flow [2024-12-02 10:14:45,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1986, PETRI_PLACES=165, PETRI_TRANSITIONS=177} [2024-12-02 10:14:45,578 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2024-12-02 10:14:45,578 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 177 transitions, 1986 flow [2024-12-02 10:14:45,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.91304347826087) internal successors, (274), 23 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:45,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:45,579 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:45,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:14:45,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:45,779 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:45,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 311605238, now seen corresponding path program 6 times [2024-12-02 10:14:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670508714] [2024-12-02 10:14:45,780 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:14:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:45,790 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 10:14:45,790 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670508714] [2024-12-02 10:14:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670508714] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:46,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:46,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:14:46,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328587695] [2024-12-02 10:14:46,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:46,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:14:46,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:46,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:14:46,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:14:46,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:46,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 177 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:46,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:46,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:46,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:46,854 INFO L124 PetriNetUnfolderBase]: 3195/4915 cut-off events. [2024-12-02 10:14:46,855 INFO L125 PetriNetUnfolderBase]: For 27559/27712 co-relation queries the response was YES. [2024-12-02 10:14:46,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23754 conditions, 4915 events. 3195/4915 cut-off events. For 27559/27712 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 25988 event pairs, 1123 based on Foata normal form. 12/4795 useless extension candidates. Maximal degree in co-relation 23688. Up to 4238 conditions per place. [2024-12-02 10:14:46,880 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 134 selfloop transitions, 81 changer transitions 8/232 dead transitions. [2024-12-02 10:14:46,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 232 transitions, 2906 flow [2024-12-02 10:14:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:14:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 10:14:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-12-02 10:14:46,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3290909090909091 [2024-12-02 10:14:46,881 INFO L175 Difference]: Start difference. First operand has 165 places, 177 transitions, 1986 flow. Second operand 11 states and 181 transitions. [2024-12-02 10:14:46,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 232 transitions, 2906 flow [2024-12-02 10:14:46,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 232 transitions, 2730 flow, removed 33 selfloop flow, removed 13 redundant places. [2024-12-02 10:14:46,942 INFO L231 Difference]: Finished difference. Result has 162 places, 194 transitions, 2323 flow [2024-12-02 10:14:46,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2323, PETRI_PLACES=162, PETRI_TRANSITIONS=194} [2024-12-02 10:14:46,943 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 110 predicate places. [2024-12-02 10:14:46,943 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 194 transitions, 2323 flow [2024-12-02 10:14:46,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:46,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:46,943 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:46,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 10:14:46,943 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:46,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2058957222, now seen corresponding path program 7 times [2024-12-02 10:14:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:46,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718102609] [2024-12-02 10:14:46,944 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:14:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718102609] [2024-12-02 10:14:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718102609] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144157984] [2024-12-02 10:14:47,341 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:14:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:47,343 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:47,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:14:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:14:47,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 10:14:47,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:47,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:47,608 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 85 treesize of output 61 [2024-12-02 10:14:47,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-12-02 10:14:47,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-12-02 10:14:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:47,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:47,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-12-02 10:14:47,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-12-02 10:14:48,514 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 117 treesize of output 105 [2024-12-02 10:14:48,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:48,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-12-02 10:14:49,211 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 100 treesize of output 92 [2024-12-02 10:14:49,238 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-12-02 10:14:49,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 110 [2024-12-02 10:14:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:49,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144157984] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:49,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:49,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-12-02 10:14:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609872779] [2024-12-02 10:14:49,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:49,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 10:14:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:49,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 10:14:49,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:14:49,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-12-02 10:14:49,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 194 transitions, 2323 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:49,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:49,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-12-02 10:14:49,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:51,592 INFO L124 PetriNetUnfolderBase]: 2597/4128 cut-off events. [2024-12-02 10:14:51,592 INFO L125 PetriNetUnfolderBase]: For 26884/27102 co-relation queries the response was YES. [2024-12-02 10:14:51,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20707 conditions, 4128 events. 2597/4128 cut-off events. For 26884/27102 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22562 event pairs, 835 based on Foata normal form. 7/4128 useless extension candidates. Maximal degree in co-relation 20422. Up to 3286 conditions per place. [2024-12-02 10:14:51,615 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 121 selfloop transitions, 45 changer transitions 69/244 dead transitions. [2024-12-02 10:14:51,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 244 transitions, 3053 flow [2024-12-02 10:14:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 10:14:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-12-02 10:14:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 255 transitions. [2024-12-02 10:14:51,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-12-02 10:14:51,616 INFO L175 Difference]: Start difference. First operand has 162 places, 194 transitions, 2323 flow. Second operand 15 states and 255 transitions. [2024-12-02 10:14:51,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 244 transitions, 3053 flow [2024-12-02 10:14:51,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 244 transitions, 2988 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-12-02 10:14:51,675 INFO L231 Difference]: Finished difference. Result has 177 places, 162 transitions, 1888 flow [2024-12-02 10:14:51,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1888, PETRI_PLACES=177, PETRI_TRANSITIONS=162} [2024-12-02 10:14:51,675 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2024-12-02 10:14:51,675 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 162 transitions, 1888 flow [2024-12-02 10:14:51,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:51,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:51,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:51,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 10:14:51,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 10:14:51,876 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:51,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1178811802, now seen corresponding path program 8 times [2024-12-02 10:14:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:51,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840044168] [2024-12-02 10:14:51,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:14:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:51,887 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:14:51,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:52,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:52,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840044168] [2024-12-02 10:14:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840044168] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:14:52,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:14:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 10:14:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027298653] [2024-12-02 10:14:52,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:14:52,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 10:14:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:52,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 10:14:52,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:14:52,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:52,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 162 transitions, 1888 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:52,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:52,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:52,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:52,833 INFO L124 PetriNetUnfolderBase]: 3076/4728 cut-off events. [2024-12-02 10:14:52,833 INFO L125 PetriNetUnfolderBase]: For 30069/30226 co-relation queries the response was YES. [2024-12-02 10:14:52,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 4728 events. 3076/4728 cut-off events. For 30069/30226 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24913 event pairs, 1084 based on Foata normal form. 6/4603 useless extension candidates. Maximal degree in co-relation 23618. Up to 4114 conditions per place. [2024-12-02 10:14:52,855 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 125 selfloop transitions, 66 changer transitions 7/205 dead transitions. [2024-12-02 10:14:52,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 205 transitions, 2617 flow [2024-12-02 10:14:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:14:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 10:14:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-12-02 10:14:52,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33 [2024-12-02 10:14:52,856 INFO L175 Difference]: Start difference. First operand has 177 places, 162 transitions, 1888 flow. Second operand 10 states and 165 transitions. [2024-12-02 10:14:52,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 205 transitions, 2617 flow [2024-12-02 10:14:52,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 205 transitions, 2378 flow, removed 17 selfloop flow, removed 14 redundant places. [2024-12-02 10:14:52,900 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 1992 flow [2024-12-02 10:14:52,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1992, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2024-12-02 10:14:52,900 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-12-02 10:14:52,900 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 1992 flow [2024-12-02 10:14:52,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 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) [2024-12-02 10:14:52,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:52,901 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:52,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 10:14:52,901 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:52,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:52,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1244266660, now seen corresponding path program 9 times [2024-12-02 10:14:52,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:52,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756097154] [2024-12-02 10:14:52,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:14:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:52,912 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:14:52,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:14:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756097154] [2024-12-02 10:14:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756097154] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184797423] [2024-12-02 10:14:53,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:14:53,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:53,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:53,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:53,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:14:53,198 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:14:53,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:53,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 10:14:53,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:53,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:53,445 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 75 treesize of output 51 [2024-12-02 10:14:53,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-12-02 10:14:53,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-12-02 10:14:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:53,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:53,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-12-02 10:14:53,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-12-02 10:14:54,445 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 100 treesize of output 92 [2024-12-02 10:14:54,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:54,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-12-02 10:14:54,745 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 117 treesize of output 105 [2024-12-02 10:14:54,753 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-12-02 10:14:54,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2024-12-02 10:14:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:54,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184797423] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:54,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:54,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-12-02 10:14:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941963157] [2024-12-02 10:14:54,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:54,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 10:14:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:54,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 10:14:54,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-12-02 10:14:55,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:55,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 1992 flow. Second operand has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:55,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:55,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:55,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:14:57,137 INFO L124 PetriNetUnfolderBase]: 3232/5011 cut-off events. [2024-12-02 10:14:57,137 INFO L125 PetriNetUnfolderBase]: For 32200/32364 co-relation queries the response was YES. [2024-12-02 10:14:57,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24909 conditions, 5011 events. 3232/5011 cut-off events. For 32200/32364 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 27006 event pairs, 1050 based on Foata normal form. 6/4886 useless extension candidates. Maximal degree in co-relation 24854. Up to 3870 conditions per place. [2024-12-02 10:14:57,165 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 136 selfloop transitions, 98 changer transitions 46/287 dead transitions. [2024-12-02 10:14:57,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 287 transitions, 3274 flow [2024-12-02 10:14:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 10:14:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-12-02 10:14:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 476 transitions. [2024-12-02 10:14:57,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2975 [2024-12-02 10:14:57,166 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 1992 flow. Second operand 32 states and 476 transitions. [2024-12-02 10:14:57,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 287 transitions, 3274 flow [2024-12-02 10:14:57,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 287 transitions, 3171 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-12-02 10:14:57,223 INFO L231 Difference]: Finished difference. Result has 192 places, 168 transitions, 1954 flow [2024-12-02 10:14:57,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1954, PETRI_PLACES=192, PETRI_TRANSITIONS=168} [2024-12-02 10:14:57,224 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2024-12-02 10:14:57,224 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 168 transitions, 1954 flow [2024-12-02 10:14:57,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:57,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:14:57,224 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:14:57,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:14:57,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 10:14:57,424 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:14:57,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:14:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2077143646, now seen corresponding path program 10 times [2024-12-02 10:14:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:14:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066552470] [2024-12-02 10:14:57,425 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:14:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:14:57,434 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:14:57,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:14:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066552470] [2024-12-02 10:14:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066552470] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:14:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620861784] [2024-12-02 10:14:57,748 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:14:57,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:14:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:14:57,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:14:57,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 10:14:57,825 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:14:57,825 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:14:57,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 10:14:57,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:14:57,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 10:14:58,107 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 75 treesize of output 51 [2024-12-02 10:14:58,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-12-02 10:14:58,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-12-02 10:14:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:58,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:14:58,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2024-12-02 10:14:58,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 108 [2024-12-02 10:14:59,104 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 100 treesize of output 92 [2024-12-02 10:14:59,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:14:59,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-12-02 10:14:59,539 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 117 treesize of output 105 [2024-12-02 10:14:59,549 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-12-02 10:14:59,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2024-12-02 10:14:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:14:59,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620861784] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:14:59,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:14:59,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-12-02 10:14:59,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070206236] [2024-12-02 10:14:59,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:14:59,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 10:14:59,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:14:59,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 10:14:59,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-12-02 10:14:59,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:14:59,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 168 transitions, 1954 flow. Second operand has 24 states, 24 states have (on average 11.958333333333334) internal successors, (287), 24 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:14:59,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:14:59,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:14:59,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:02,574 INFO L124 PetriNetUnfolderBase]: 4264/6514 cut-off events. [2024-12-02 10:15:02,574 INFO L125 PetriNetUnfolderBase]: For 45073/45377 co-relation queries the response was YES. [2024-12-02 10:15:02,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32097 conditions, 6514 events. 4264/6514 cut-off events. For 45073/45377 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 36046 event pairs, 1059 based on Foata normal form. 2/6509 useless extension candidates. Maximal degree in co-relation 32040. Up to 4152 conditions per place. [2024-12-02 10:15:02,616 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 153 selfloop transitions, 134 changer transitions 75/367 dead transitions. [2024-12-02 10:15:02,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 367 transitions, 4255 flow [2024-12-02 10:15:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-12-02 10:15:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-12-02 10:15:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 491 transitions. [2024-12-02 10:15:02,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3167741935483871 [2024-12-02 10:15:02,618 INFO L175 Difference]: Start difference. First operand has 192 places, 168 transitions, 1954 flow. Second operand 31 states and 491 transitions. [2024-12-02 10:15:02,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 367 transitions, 4255 flow [2024-12-02 10:15:02,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 367 transitions, 3956 flow, removed 65 selfloop flow, removed 24 redundant places. [2024-12-02 10:15:02,701 INFO L231 Difference]: Finished difference. Result has 202 places, 220 transitions, 2671 flow [2024-12-02 10:15:02,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2671, PETRI_PLACES=202, PETRI_TRANSITIONS=220} [2024-12-02 10:15:02,702 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 150 predicate places. [2024-12-02 10:15:02,702 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 220 transitions, 2671 flow [2024-12-02 10:15:02,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.958333333333334) internal successors, (287), 24 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:02,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:02,702 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, 1, 1, 1] [2024-12-02 10:15:02,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 10:15:02,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 10:15:02,903 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:02,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:02,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1257135981, now seen corresponding path program 11 times [2024-12-02 10:15:02,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761537543] [2024-12-02 10:15:02,903 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:15:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:02,910 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 10:15:02,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:15:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761537543] [2024-12-02 10:15:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761537543] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464558935] [2024-12-02 10:15:02,953 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:15:02,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:02,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:02,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:02,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 10:15:03,012 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 10:15:03,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:03,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:15:03,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:15:03,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:15:03,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464558935] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:03,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:15:03,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-12-02 10:15:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000083211] [2024-12-02 10:15:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:15:03,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:15:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:03,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:15:03,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:15:03,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-12-02 10:15:03,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 220 transitions, 2671 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:03,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:03,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-12-02 10:15:03,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:03,813 INFO L124 PetriNetUnfolderBase]: 3793/5689 cut-off events. [2024-12-02 10:15:03,813 INFO L125 PetriNetUnfolderBase]: For 52000/52413 co-relation queries the response was YES. [2024-12-02 10:15:03,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32065 conditions, 5689 events. 3793/5689 cut-off events. For 52000/52413 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30487 event pairs, 442 based on Foata normal form. 175/5861 useless extension candidates. Maximal degree in co-relation 32003. Up to 2422 conditions per place. [2024-12-02 10:15:03,850 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 230 selfloop transitions, 26 changer transitions 0/261 dead transitions. [2024-12-02 10:15:03,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 261 transitions, 3490 flow [2024-12-02 10:15:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:15:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:15:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-12-02 10:15:03,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35428571428571426 [2024-12-02 10:15:03,851 INFO L175 Difference]: Start difference. First operand has 202 places, 220 transitions, 2671 flow. Second operand 7 states and 124 transitions. [2024-12-02 10:15:03,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 261 transitions, 3490 flow [2024-12-02 10:15:03,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 261 transitions, 3005 flow, removed 130 selfloop flow, removed 26 redundant places. [2024-12-02 10:15:03,981 INFO L231 Difference]: Finished difference. Result has 157 places, 216 transitions, 2243 flow [2024-12-02 10:15:03,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2243, PETRI_PLACES=157, PETRI_TRANSITIONS=216} [2024-12-02 10:15:03,981 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-12-02 10:15:03,981 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 216 transitions, 2243 flow [2024-12-02 10:15:03,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:03,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:03,982 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:15:03,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 10:15:04,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 10:15:04,182 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:04,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1311933425, now seen corresponding path program 12 times [2024-12-02 10:15:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:04,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580016359] [2024-12-02 10:15:04,183 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:15:04,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:04,192 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 10:15:04,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580016359] [2024-12-02 10:15:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580016359] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718656993] [2024-12-02 10:15:04,254 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:15:04,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:04,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:04,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:04,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 10:15:04,327 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 10:15:04,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:04,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:15:04,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:04,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:04,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718656993] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:15:04,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:15:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-12-02 10:15:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740008273] [2024-12-02 10:15:04,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:15:04,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 10:15:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:04,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 10:15:04,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-12-02 10:15:04,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-12-02 10:15:04,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 216 transitions, 2243 flow. Second operand has 15 states, 15 states have (on average 9.8) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:04,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:04,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-12-02 10:15:04,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:06,251 INFO L124 PetriNetUnfolderBase]: 9168/13082 cut-off events. [2024-12-02 10:15:06,251 INFO L125 PetriNetUnfolderBase]: For 96232/96232 co-relation queries the response was YES. [2024-12-02 10:15:06,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65120 conditions, 13082 events. 9168/13082 cut-off events. For 96232/96232 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 69432 event pairs, 768 based on Foata normal form. 0/12317 useless extension candidates. Maximal degree in co-relation 65073. Up to 4051 conditions per place. [2024-12-02 10:15:06,336 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 506 selfloop transitions, 133 changer transitions 0/640 dead transitions. [2024-12-02 10:15:06,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 640 transitions, 7446 flow [2024-12-02 10:15:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 10:15:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-12-02 10:15:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 396 transitions. [2024-12-02 10:15:06,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3168 [2024-12-02 10:15:06,337 INFO L175 Difference]: Start difference. First operand has 157 places, 216 transitions, 2243 flow. Second operand 25 states and 396 transitions. [2024-12-02 10:15:06,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 640 transitions, 7446 flow [2024-12-02 10:15:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 640 transitions, 7270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 10:15:06,726 INFO L231 Difference]: Finished difference. Result has 196 places, 318 transitions, 3648 flow [2024-12-02 10:15:06,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3648, PETRI_PLACES=196, PETRI_TRANSITIONS=318} [2024-12-02 10:15:06,727 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-12-02 10:15:06,727 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 318 transitions, 3648 flow [2024-12-02 10:15:06,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.8) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:06,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:06,727 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:15:06,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 10:15:06,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:06,928 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:06,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1778142035, now seen corresponding path program 13 times [2024-12-02 10:15:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:06,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978478464] [2024-12-02 10:15:06,928 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:15:06,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:15:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 10:15:07,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978478464] [2024-12-02 10:15:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978478464] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:07,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036387466] [2024-12-02 10:15:07,008 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:15:07,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:07,010 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 10:15:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:15:07,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:15:07,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 10:15:07,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 10:15:07,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036387466] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:15:07,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:15:07,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-12-02 10:15:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606283761] [2024-12-02 10:15:07,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:15:07,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:15:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:07,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:15:07,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:15:07,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-12-02 10:15:07,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 318 transitions, 3648 flow. Second operand has 19 states, 19 states have (on average 10.473684210526315) internal successors, (199), 19 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:07,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:07,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-12-02 10:15:07,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:10,329 INFO L124 PetriNetUnfolderBase]: 12117/17631 cut-off events. [2024-12-02 10:15:10,329 INFO L125 PetriNetUnfolderBase]: For 270902/271495 co-relation queries the response was YES. [2024-12-02 10:15:10,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113330 conditions, 17631 events. 12117/17631 cut-off events. For 270902/271495 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 106180 event pairs, 1218 based on Foata normal form. 599/17960 useless extension candidates. Maximal degree in co-relation 113263. Up to 5252 conditions per place. [2024-12-02 10:15:10,496 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 583 selfloop transitions, 171 changer transitions 0/776 dead transitions. [2024-12-02 10:15:10,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 776 transitions, 10406 flow [2024-12-02 10:15:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 10:15:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 10:15:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 292 transitions. [2024-12-02 10:15:10,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34352941176470586 [2024-12-02 10:15:10,498 INFO L175 Difference]: Start difference. First operand has 196 places, 318 transitions, 3648 flow. Second operand 17 states and 292 transitions. [2024-12-02 10:15:10,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 776 transitions, 10406 flow [2024-12-02 10:15:11,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 776 transitions, 10308 flow, removed 49 selfloop flow, removed 0 redundant places. [2024-12-02 10:15:11,841 INFO L231 Difference]: Finished difference. Result has 222 places, 418 transitions, 5355 flow [2024-12-02 10:15:11,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5355, PETRI_PLACES=222, PETRI_TRANSITIONS=418} [2024-12-02 10:15:11,842 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 170 predicate places. [2024-12-02 10:15:11,842 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 418 transitions, 5355 flow [2024-12-02 10:15:11,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.473684210526315) internal successors, (199), 19 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:11,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:11,842 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:15:11,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 10:15:12,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:12,043 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:12,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1173877599, now seen corresponding path program 14 times [2024-12-02 10:15:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:12,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630729050] [2024-12-02 10:15:12,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:15:12,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:12,055 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:15:12,055 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:15:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630729050] [2024-12-02 10:15:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630729050] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81571524] [2024-12-02 10:15:12,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:15:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:12,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:12,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 10:15:12,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:15:12,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:12,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:15:12,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:15:12,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:15:12,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81571524] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:15:12,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:15:12,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-12-02 10:15:12,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3902793] [2024-12-02 10:15:12,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:15:12,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 10:15:12,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:12,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 10:15:12,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-12-02 10:15:12,433 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-12-02 10:15:12,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 418 transitions, 5355 flow. Second operand has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 17 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:12,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:12,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-12-02 10:15:12,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:15,605 INFO L124 PetriNetUnfolderBase]: 12697/18582 cut-off events. [2024-12-02 10:15:15,606 INFO L125 PetriNetUnfolderBase]: For 330066/330776 co-relation queries the response was YES. [2024-12-02 10:15:15,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130683 conditions, 18582 events. 12697/18582 cut-off events. For 330066/330776 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 112824 event pairs, 1667 based on Foata normal form. 684/19157 useless extension candidates. Maximal degree in co-relation 130605. Up to 5622 conditions per place. [2024-12-02 10:15:15,774 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 411 selfloop transitions, 221 changer transitions 0/654 dead transitions. [2024-12-02 10:15:15,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 654 transitions, 9508 flow [2024-12-02 10:15:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:15:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 10:15:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-12-02 10:15:15,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2024-12-02 10:15:15,775 INFO L175 Difference]: Start difference. First operand has 222 places, 418 transitions, 5355 flow. Second operand 13 states and 218 transitions. [2024-12-02 10:15:15,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 654 transitions, 9508 flow [2024-12-02 10:15:17,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 654 transitions, 9312 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-12-02 10:15:17,646 INFO L231 Difference]: Finished difference. Result has 231 places, 473 transitions, 6580 flow [2024-12-02 10:15:17,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6580, PETRI_PLACES=231, PETRI_TRANSITIONS=473} [2024-12-02 10:15:17,646 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 179 predicate places. [2024-12-02 10:15:17,647 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 473 transitions, 6580 flow [2024-12-02 10:15:17,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.647058823529411) internal successors, (181), 17 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:17,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:17,647 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:15:17,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 10:15:17,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:17,848 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:17,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -847163487, now seen corresponding path program 15 times [2024-12-02 10:15:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:17,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860280284] [2024-12-02 10:15:17,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:15:17,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:17,857 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:15:17,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:17,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860280284] [2024-12-02 10:15:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860280284] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218695250] [2024-12-02 10:15:17,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:15:17,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:17,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:17,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:17,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 10:15:17,976 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:15:17,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:17,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:15:17,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:18,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:18,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218695250] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:15:18,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:15:18,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-02 10:15:18,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344928302] [2024-12-02 10:15:18,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:15:18,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 10:15:18,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:18,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 10:15:18,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-12-02 10:15:18,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-12-02 10:15:18,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 473 transitions, 6580 flow. Second operand has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:18,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:18,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-12-02 10:15:18,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:26,118 INFO L124 PetriNetUnfolderBase]: 31264/44216 cut-off events. [2024-12-02 10:15:26,118 INFO L125 PetriNetUnfolderBase]: For 831079/831079 co-relation queries the response was YES. [2024-12-02 10:15:26,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327401 conditions, 44216 events. 31264/44216 cut-off events. For 831079/831079 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 273823 event pairs, 1116 based on Foata normal form. 23/44239 useless extension candidates. Maximal degree in co-relation 327321. Up to 11356 conditions per place. [2024-12-02 10:15:26,794 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 951 selfloop transitions, 588 changer transitions 0/1540 dead transitions. [2024-12-02 10:15:26,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1540 transitions, 24142 flow [2024-12-02 10:15:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 10:15:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-12-02 10:15:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 547 transitions. [2024-12-02 10:15:26,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.341875 [2024-12-02 10:15:26,796 INFO L175 Difference]: Start difference. First operand has 231 places, 473 transitions, 6580 flow. Second operand 32 states and 547 transitions. [2024-12-02 10:15:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1540 transitions, 24142 flow [2024-12-02 10:15:36,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1540 transitions, 23612 flow, removed 134 selfloop flow, removed 8 redundant places. [2024-12-02 10:15:36,321 INFO L231 Difference]: Finished difference. Result has 273 places, 979 transitions, 15385 flow [2024-12-02 10:15:36,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15385, PETRI_PLACES=273, PETRI_TRANSITIONS=979} [2024-12-02 10:15:36,322 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 221 predicate places. [2024-12-02 10:15:36,322 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 979 transitions, 15385 flow [2024-12-02 10:15:36,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:36,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:15:36,322 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:15:36,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 10:15:36,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:36,522 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:15:36,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:15:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 539559615, now seen corresponding path program 16 times [2024-12-02 10:15:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:15:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234086597] [2024-12-02 10:15:36,523 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:15:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:15:36,533 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:15:36,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:36,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:15:36,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234086597] [2024-12-02 10:15:36,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234086597] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:15:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057573524] [2024-12-02 10:15:36,596 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:15:36,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:15:36,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:15:36,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:15:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 10:15:36,668 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:15:36,669 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:15:36,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:15:36,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:15:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:36,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:15:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:15:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057573524] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:15:36,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:15:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-12-02 10:15:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147714569] [2024-12-02 10:15:36,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:15:36,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:15:36,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:15:36,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:15:36,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-12-02 10:15:36,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-12-02 10:15:36,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 979 transitions, 15385 flow. Second operand has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 18 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:15:36,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:15:36,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-12-02 10:15:36,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:15:56,213 INFO L124 PetriNetUnfolderBase]: 54532/76034 cut-off events. [2024-12-02 10:15:56,214 INFO L125 PetriNetUnfolderBase]: For 1832909/1832909 co-relation queries the response was YES. [2024-12-02 10:15:56,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621513 conditions, 76034 events. 54532/76034 cut-off events. For 1832909/1832909 co-relation queries the response was YES. Maximal size of possible extension queue 2032. Compared 480427 event pairs, 1246 based on Foata normal form. 98/76132 useless extension candidates. Maximal degree in co-relation 621417. Up to 18482 conditions per place. [2024-12-02 10:15:57,127 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 1333 selfloop transitions, 1607 changer transitions 0/2941 dead transitions. [2024-12-02 10:15:57,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 2941 transitions, 50464 flow [2024-12-02 10:15:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-12-02 10:15:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-12-02 10:15:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1166 transitions. [2024-12-02 10:15:57,130 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3238888888888889 [2024-12-02 10:15:57,130 INFO L175 Difference]: Start difference. First operand has 273 places, 979 transitions, 15385 flow. Second operand 72 states and 1166 transitions. [2024-12-02 10:15:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 2941 transitions, 50464 flow [2024-12-02 10:16:50,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 2941 transitions, 48248 flow, removed 1063 selfloop flow, removed 1 redundant places. [2024-12-02 10:16:50,477 INFO L231 Difference]: Finished difference. Result has 396 places, 2019 transitions, 35999 flow [2024-12-02 10:16:50,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=14561, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=35999, PETRI_PLACES=396, PETRI_TRANSITIONS=2019} [2024-12-02 10:16:50,478 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 344 predicate places. [2024-12-02 10:16:50,478 INFO L471 AbstractCegarLoop]: Abstraction has has 396 places, 2019 transitions, 35999 flow [2024-12-02 10:16:50,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.666666666666666) internal successors, (174), 18 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:16:50,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:16:50,478 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:16:50,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-12-02 10:16:50,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:16:50,679 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:16:50,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:16:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1162372991, now seen corresponding path program 17 times [2024-12-02 10:16:50,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:16:50,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684284969] [2024-12-02 10:16:50,679 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:16:50,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:16:50,692 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 10:16:50,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:16:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:16:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:16:50,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684284969] [2024-12-02 10:16:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684284969] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:16:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87257175] [2024-12-02 10:16:50,777 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:16:50,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:16:50,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:16:50,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:16:50,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 10:16:50,852 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 10:16:50,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:16:50,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:16:50,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:16:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:16:50,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:16:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:16:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87257175] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:16:51,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:16:51,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-12-02 10:16:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357379100] [2024-12-02 10:16:51,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:16:51,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 10:16:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:16:51,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 10:16:51,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:16:51,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-12-02 10:16:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 2019 transitions, 35999 flow. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:16:51,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:16:51,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-12-02 10:16:51,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:17:20,184 INFO L124 PetriNetUnfolderBase]: 52191/74954 cut-off events. [2024-12-02 10:17:20,185 INFO L125 PetriNetUnfolderBase]: For 3448759/3452222 co-relation queries the response was YES. [2024-12-02 10:17:21,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720087 conditions, 74954 events. 52191/74954 cut-off events. For 3448759/3452222 co-relation queries the response was YES. Maximal size of possible extension queue 2566. Compared 518942 event pairs, 3467 based on Foata normal form. 2020/76456 useless extension candidates. Maximal degree in co-relation 719938. Up to 20607 conditions per place. [2024-12-02 10:17:21,969 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 1289 selfloop transitions, 1253 changer transitions 0/2590 dead transitions. [2024-12-02 10:17:21,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 2590 transitions, 50683 flow [2024-12-02 10:17:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 10:17:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 10:17:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 270 transitions. [2024-12-02 10:17:21,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3375 [2024-12-02 10:17:21,971 INFO L175 Difference]: Start difference. First operand has 396 places, 2019 transitions, 35999 flow. Second operand 16 states and 270 transitions. [2024-12-02 10:17:21,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 2590 transitions, 50683 flow [2024-12-02 10:18:12,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 2590 transitions, 48960 flow, removed 801 selfloop flow, removed 2 redundant places. [2024-12-02 10:18:12,659 INFO L231 Difference]: Finished difference. Result has 415 places, 2278 transitions, 42906 flow [2024-12-02 10:18:12,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=34358, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42906, PETRI_PLACES=415, PETRI_TRANSITIONS=2278} [2024-12-02 10:18:12,661 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 363 predicate places. [2024-12-02 10:18:12,661 INFO L471 AbstractCegarLoop]: Abstraction has has 415 places, 2278 transitions, 42906 flow [2024-12-02 10:18:12,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:18:12,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:18:12,661 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:18:12,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-12-02 10:18:12,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:12,861 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:18:12,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:18:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash 391896491, now seen corresponding path program 18 times [2024-12-02 10:18:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:18:12,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401663262] [2024-12-02 10:18:12,862 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:18:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:18:12,872 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 10:18:12,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:18:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:18:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:18:12,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401663262] [2024-12-02 10:18:12,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401663262] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:18:12,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182046113] [2024-12-02 10:18:12,929 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:18:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:18:12,930 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:18:12,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 10:18:13,000 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-12-02 10:18:13,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:18:13,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:18:13,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:18:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:18:13,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:18:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:18:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182046113] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:18:13,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:18:13,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-12-02 10:18:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890059744] [2024-12-02 10:18:13,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:18:13,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:18:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:18:13,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:18:13,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:18:13,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-12-02 10:18:13,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 2278 transitions, 42906 flow. Second operand has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:18:13,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:18:13,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-12-02 10:18:13,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:18:59,305 INFO L124 PetriNetUnfolderBase]: 72947/101712 cut-off events. [2024-12-02 10:18:59,306 INFO L125 PetriNetUnfolderBase]: For 5144975/5144975 co-relation queries the response was YES. [2024-12-02 10:19:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022071 conditions, 101712 events. 72947/101712 cut-off events. For 5144975/5144975 co-relation queries the response was YES. Maximal size of possible extension queue 2875. Compared 666230 event pairs, 1466 based on Foata normal form. 22/101734 useless extension candidates. Maximal degree in co-relation 1021917. Up to 24035 conditions per place. [2024-12-02 10:19:01,164 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 1313 selfloop transitions, 2847 changer transitions 0/4161 dead transitions. [2024-12-02 10:19:01,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 4161 transitions, 85147 flow [2024-12-02 10:19:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 10:19:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-12-02 10:19:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 624 transitions. [2024-12-02 10:19:01,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3372972972972973 [2024-12-02 10:19:01,166 INFO L175 Difference]: Start difference. First operand has 415 places, 2278 transitions, 42906 flow. Second operand 37 states and 624 transitions. [2024-12-02 10:19:01,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 4161 transitions, 85147 flow [2024-12-02 10:20:37,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 4161 transitions, 84770 flow, removed 183 selfloop flow, removed 5 redundant places. [2024-12-02 10:20:37,372 INFO L231 Difference]: Finished difference. Result has 460 places, 3466 transitions, 74267 flow [2024-12-02 10:20:37,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=42721, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=74267, PETRI_PLACES=460, PETRI_TRANSITIONS=3466} [2024-12-02 10:20:37,373 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 408 predicate places. [2024-12-02 10:20:37,374 INFO L471 AbstractCegarLoop]: Abstraction has has 460 places, 3466 transitions, 74267 flow [2024-12-02 10:20:37,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.214285714285714) internal successors, (143), 14 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:20:37,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:20:37,374 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:20:37,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 10:20:37,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-12-02 10:20:37,574 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:20:37,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:20:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 55394583, now seen corresponding path program 19 times [2024-12-02 10:20:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:20:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385463585] [2024-12-02 10:20:37,576 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:20:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:20:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:20:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 10:20:37,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:20:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385463585] [2024-12-02 10:20:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385463585] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:20:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491343261] [2024-12-02 10:20:37,664 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:20:37,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:20:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:20:37,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:20:37,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 10:20:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:20:37,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:20:37,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:20:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 10:20:37,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:20:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 10:20:37,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491343261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:20:37,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:20:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-12-02 10:20:37,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379086848] [2024-12-02 10:20:37,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:20:37,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:20:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:20:37,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:20:37,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:20:38,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-12-02 10:20:38,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 3466 transitions, 74267 flow. Second operand has 20 states, 20 states have (on average 10.45) internal successors, (209), 20 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:20:38,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:20:38,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-12-02 10:20:38,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:21:43,657 INFO L124 PetriNetUnfolderBase]: 85785/121544 cut-off events. [2024-12-02 10:21:43,657 INFO L125 PetriNetUnfolderBase]: For 6531080/6535908 co-relation queries the response was YES. [2024-12-02 10:21:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270239 conditions, 121544 events. 85785/121544 cut-off events. For 6531080/6535908 co-relation queries the response was YES. Maximal size of possible extension queue 4159. Compared 866140 event pairs, 4571 based on Foata normal form. 2329/123298 useless extension candidates. Maximal degree in co-relation 1270072. Up to 33451 conditions per place. [2024-12-02 10:21:46,334 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 2301 selfloop transitions, 3110 changer transitions 0/5469 dead transitions. [2024-12-02 10:21:46,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 5469 transitions, 123801 flow [2024-12-02 10:21:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 10:21:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-12-02 10:21:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 492 transitions. [2024-12-02 10:21:46,336 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36444444444444446 [2024-12-02 10:21:46,336 INFO L175 Difference]: Start difference. First operand has 460 places, 3466 transitions, 74267 flow. Second operand 27 states and 492 transitions. [2024-12-02 10:21:46,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 5469 transitions, 123801 flow [2024-12-02 10:24:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 5469 transitions, 120928 flow, removed 541 selfloop flow, removed 2 redundant places. [2024-12-02 10:24:36,515 INFO L231 Difference]: Finished difference. Result has 492 places, 4329 transitions, 100395 flow [2024-12-02 10:24:36,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=72455, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=100395, PETRI_PLACES=492, PETRI_TRANSITIONS=4329} [2024-12-02 10:24:36,517 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 440 predicate places. [2024-12-02 10:24:36,517 INFO L471 AbstractCegarLoop]: Abstraction has has 492 places, 4329 transitions, 100395 flow [2024-12-02 10:24:36,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.45) internal successors, (209), 20 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:24:36,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:24:36,518 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:24:36,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-12-02 10:24:36,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:24:36,718 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-12-02 10:24:36,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:24:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1792897937, now seen corresponding path program 20 times [2024-12-02 10:24:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:24:36,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834281636] [2024-12-02 10:24:36,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:24:36,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:24:36,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:24:36,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:24:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:24:36,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:24:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834281636] [2024-12-02 10:24:36,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834281636] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:24:36,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356346909] [2024-12-02 10:24:36,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:24:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:24:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:24:36,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:24:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_495cb976-dce6-44d4-8a55-d34971b929cd/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 10:24:36,854 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:24:36,855 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:24:36,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:24:36,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:24:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:24:36,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:24:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:24:37,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356346909] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:24:37,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:24:37,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-12-02 10:24:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862497977] [2024-12-02 10:24:37,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:24:37,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 10:24:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:24:37,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 10:24:37,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-12-02 10:24:37,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-12-02 10:24:37,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 4329 transitions, 100395 flow. Second operand has 15 states, 15 states have (on average 10.133333333333333) internal successors, (152), 15 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:24:37,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:24:37,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-12-02 10:24:37,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:26:41,499 INFO L124 PetriNetUnfolderBase]: 130574/180795 cut-off events. [2024-12-02 10:26:41,500 INFO L125 PetriNetUnfolderBase]: For 9933925/9933925 co-relation queries the response was YES. [2024-12-02 10:26:44,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930508 conditions, 180795 events. 130574/180795 cut-off events. For 9933925/9933925 co-relation queries the response was YES. Maximal size of possible extension queue 5110. Compared 1248133 event pairs, 3099 based on Foata normal form. 22/180817 useless extension candidates. Maximal degree in co-relation 1930333. Up to 45190 conditions per place. [2024-12-02 10:26:45,596 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 1706 selfloop transitions, 5175 changer transitions 0/6882 dead transitions. [2024-12-02 10:26:45,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 6882 transitions, 169081 flow [2024-12-02 10:26:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-12-02 10:26:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-12-02 10:26:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 660 transitions. [2024-12-02 10:26:45,598 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3384615384615385 [2024-12-02 10:26:45,598 INFO L175 Difference]: Start difference. First operand has 492 places, 4329 transitions, 100395 flow. Second operand 39 states and 660 transitions. [2024-12-02 10:26:45,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 6882 transitions, 169081 flow