./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd --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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:28:56,980 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:28:57,068 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 16:28:57,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:28:57,081 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:28:57,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:28:57,124 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:28:57,124 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:28:57,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:28:57,125 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:28:57,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:28:57,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:28:57,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:28:57,126 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:28:57,127 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 16:28:57,127 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:28:57,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:28:57,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:28:57,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:28:57,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:28:57,129 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_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd 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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-11-13 16:28:57,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:28:57,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:28:57,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:28:57,470 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:28:57,470 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:28:57,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c Unable to find full path for "g++" [2024-11-13 16:28:59,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:28:59,741 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:28:59,741 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-13 16:28:59,768 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/data/36e0a73df/99bd6b1594e0486e87074b73898ab1b7/FLAGfc7cb095d [2024-11-13 16:28:59,978 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/data/36e0a73df/99bd6b1594e0486e87074b73898ab1b7 [2024-11-13 16:28:59,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:28:59,982 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:28:59,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:28:59,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:28:59,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:28:59,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:28:59" (1/1) ... [2024-11-13 16:28:59,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c5e466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:59, skipping insertion in model container [2024-11-13 16:28:59,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:28:59" (1/1) ... [2024-11-13 16:29:00,018 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:29:00,195 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 16:29:00,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:29:00,208 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:29:00,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:29:00,251 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:29:00,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00 WrapperNode [2024-11-13 16:29:00,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:29:00,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:29:00,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:29:00,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:29:00,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,295 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 154 [2024-11-13 16:29:00,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:29:00,296 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:29:00,300 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:29:00,300 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:29:00,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,316 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,336 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]. [2024-11-13 16:29:00,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:29:00,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:29:00,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:29:00,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:29:00,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (1/1) ... [2024-11-13 16:29:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:29:00,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:00,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:29:00,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:29:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:29:00,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 16:29:00,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 16:29:00,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 16:29:00,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:29:00,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:29:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:29:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:29:00,453 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 16:29:00,568 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:29:00,570 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:29:00,991 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 16:29:00,991 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:29:01,363 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:29:01,364 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 16:29:01,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:29:01 BoogieIcfgContainer [2024-11-13 16:29:01,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:29:01,369 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:29:01,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:29:01,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:29:01,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:28:59" (1/3) ... [2024-11-13 16:29:01,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56787733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:29:01, skipping insertion in model container [2024-11-13 16:29:01,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:29:00" (2/3) ... [2024-11-13 16:29:01,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56787733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:29:01, skipping insertion in model container [2024-11-13 16:29:01,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:29:01" (3/3) ... [2024-11-13 16:29:01,379 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-13 16:29:01,398 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:29:01,399 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 44 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2024-11-13 16:29:01,400 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 16:29:01,486 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 16:29:01,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2024-11-13 16:29:01,574 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2024-11-13 16:29:01,578 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 16:29:01,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 110 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2024-11-13 16:29:01,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2024-11-13 16:29:01,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 102 flow [2024-11-13 16:29:01,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:29:01,609 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;@2874ae37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:29:01,609 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-13 16:29:01,613 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:29:01,613 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 16:29:01,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 16:29:01,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:01,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:29:01,615 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:01,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 543261, now seen corresponding path program 1 times [2024-11-13 16:29:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:01,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918457381] [2024-11-13 16:29:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:01,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:01,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918457381] [2024-11-13 16:29:01,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918457381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:01,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:01,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 16:29:01,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142769107] [2024-11-13 16:29:01,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:01,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:29:01,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:29:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:29:01,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:01,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:01,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:01,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:01,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:02,225 INFO L124 PetriNetUnfolderBase]: 146/348 cut-off events. [2024-11-13 16:29:02,226 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-13 16:29:02,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 348 events. 146/348 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 1789 event pairs, 97 based on Foata normal form. 1/274 useless extension candidates. Maximal degree in co-relation 534. Up to 239 conditions per place. [2024-11-13 16:29:02,234 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 24 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-11-13 16:29:02,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 148 flow [2024-11-13 16:29:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:29:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:29:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-13 16:29:02,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2024-11-13 16:29:02,254 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 102 flow. Second operand 3 states and 85 transitions. [2024-11-13 16:29:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 148 flow [2024-11-13 16:29:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 16:29:02,267 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 92 flow [2024-11-13 16:29:02,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2024-11-13 16:29:02,275 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-11-13 16:29:02,275 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 92 flow [2024-11-13 16:29:02,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:02,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:02,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:29:02,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:29:02,278 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:02,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:02,279 INFO L85 PathProgramCache]: Analyzing trace with hash 543262, now seen corresponding path program 1 times [2024-11-13 16:29:02,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:02,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557641904] [2024-11-13 16:29:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:02,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557641904] [2024-11-13 16:29:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557641904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:02,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:02,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:29:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319431161] [2024-11-13 16:29:02,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:02,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:29:02,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:02,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:02,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:02,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:02,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:02,997 INFO L124 PetriNetUnfolderBase]: 147/351 cut-off events. [2024-11-13 16:29:02,998 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 16:29:02,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 351 events. 147/351 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 1800 event pairs, 97 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 585. Up to 244 conditions per place. [2024-11-13 16:29:03,003 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 27 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2024-11-13 16:29:03,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 160 flow [2024-11-13 16:29:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:29:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:29:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-11-13 16:29:03,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-13 16:29:03,008 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 92 flow. Second operand 3 states and 88 transitions. [2024-11-13 16:29:03,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 160 flow [2024-11-13 16:29:03,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:03,013 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 107 flow [2024-11-13 16:29:03,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-13 16:29:03,015 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-13 16:29:03,015 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 107 flow [2024-11-13 16:29:03,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:03,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:03,016 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 16:29:03,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:29:03,016 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:03,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 522091416, now seen corresponding path program 1 times [2024-11-13 16:29:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963906781] [2024-11-13 16:29:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:03,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963906781] [2024-11-13 16:29:03,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963906781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596936890] [2024-11-13 16:29:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:03,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:03,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:03,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:29:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:03,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:29:03,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:03,706 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 [2024-11-13 16:29:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:04,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:04,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596936890] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:04,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:04,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 16:29:04,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493389189] [2024-11-13 16:29:04,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:04,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:29:04,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:29:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:29:04,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:04,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:04,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:04,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:04,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:04,980 INFO L124 PetriNetUnfolderBase]: 147/350 cut-off events. [2024-11-13 16:29:04,980 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 16:29:04,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 350 events. 147/350 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 1799 event pairs, 97 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 585. Up to 240 conditions per place. [2024-11-13 16:29:04,986 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2024-11-13 16:29:04,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 163 flow [2024-11-13 16:29:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-13 16:29:04,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-13 16:29:04,990 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 107 flow. Second operand 5 states and 125 transitions. [2024-11-13 16:29:04,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 163 flow [2024-11-13 16:29:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:04,995 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 120 flow [2024-11-13 16:29:04,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-13 16:29:04,996 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2024-11-13 16:29:04,997 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 120 flow [2024-11-13 16:29:04,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:04,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:04,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 16:29:05,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:29:05,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:05,199 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:05,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -992115029, now seen corresponding path program 1 times [2024-11-13 16:29:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:05,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050850862] [2024-11-13 16:29:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:05,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:05,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050850862] [2024-11-13 16:29:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050850862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:29:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202256599] [2024-11-13 16:29:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:05,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:29:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:29:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:29:05,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 16:29:05,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:05,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 16:29:05,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:05,439 INFO L124 PetriNetUnfolderBase]: 146/349 cut-off events. [2024-11-13 16:29:05,440 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-13 16:29:05,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 349 events. 146/349 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 1788 event pairs, 97 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 585. Up to 242 conditions per place. [2024-11-13 16:29:05,443 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 26 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-13 16:29:05,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 170 flow [2024-11-13 16:29:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:29:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:29:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-13 16:29:05,448 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-11-13 16:29:05,449 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 120 flow. Second operand 3 states and 89 transitions. [2024-11-13 16:29:05,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 170 flow [2024-11-13 16:29:05,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 160 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-13 16:29:05,451 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2024-11-13 16:29:05,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-13 16:29:05,452 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2024-11-13 16:29:05,452 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2024-11-13 16:29:05,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:05,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:05,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 16:29:05,453 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:05,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1552231152, now seen corresponding path program 1 times [2024-11-13 16:29:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033676868] [2024-11-13 16:29:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:05,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033676868] [2024-11-13 16:29:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033676868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:05,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:05,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:29:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693584495] [2024-11-13 16:29:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:05,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:29:05,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-11-13 16:29:05,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:05,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-11-13 16:29:05,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:05,745 INFO L124 PetriNetUnfolderBase]: 146/305 cut-off events. [2024-11-13 16:29:05,745 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-13 16:29:05,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 305 events. 146/305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1288 event pairs, 97 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 551. Up to 238 conditions per place. [2024-11-13 16:29:05,748 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 26 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-13 16:29:05,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 152 flow [2024-11-13 16:29:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-13 16:29:05,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-13 16:29:05,753 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 4 states and 84 transitions. [2024-11-13 16:29:05,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 152 flow [2024-11-13 16:29:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:05,756 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 96 flow [2024-11-13 16:29:05,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, 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=4, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-13 16:29:05,758 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2024-11-13 16:29:05,758 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 96 flow [2024-11-13 16:29:05,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:05,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:05,761 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:05,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 16:29:05,761 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:05,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1552231153, now seen corresponding path program 1 times [2024-11-13 16:29:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599660837] [2024-11-13 16:29:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599660837] [2024-11-13 16:29:06,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599660837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:06,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607530360] [2024-11-13 16:29:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:06,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:29:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:06,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:29:06,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:06,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:06,421 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 29 treesize of output 25 [2024-11-13 16:29:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:06,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607530360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:06,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:06,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 16:29:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647170089] [2024-11-13 16:29:06,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:06,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:29:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:29:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:29:06,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:06,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 96 flow. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:06,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:07,112 INFO L124 PetriNetUnfolderBase]: 324/590 cut-off events. [2024-11-13 16:29:07,113 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-13 16:29:07,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 590 events. 324/590 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2725 event pairs, 111 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 1108. Up to 299 conditions per place. [2024-11-13 16:29:07,118 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 45 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-13 16:29:07,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 237 flow [2024-11-13 16:29:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-11-13 16:29:07,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-13 16:29:07,120 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 96 flow. Second operand 5 states and 145 transitions. [2024-11-13 16:29:07,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 237 flow [2024-11-13 16:29:07,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:07,125 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 109 flow [2024-11-13 16:29:07,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-13 16:29:07,126 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-13 16:29:07,126 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 109 flow [2024-11-13 16:29:07,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:07,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:07,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:07,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:07,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:07,333 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:07,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1320187681, now seen corresponding path program 1 times [2024-11-13 16:29:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:07,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750665656] [2024-11-13 16:29:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750665656] [2024-11-13 16:29:07,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750665656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825903116] [2024-11-13 16:29:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:07,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:29:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:07,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:29:07,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:07,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:07,982 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 29 treesize of output 25 [2024-11-13 16:29:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825903116] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:08,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:08,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 16:29:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034332802] [2024-11-13 16:29:08,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:08,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:29:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:29:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:29:08,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-13 16:29:08,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 109 flow. Second operand has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:08,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:08,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-13 16:29:08,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:08,600 INFO L124 PetriNetUnfolderBase]: 586/1003 cut-off events. [2024-11-13 16:29:08,601 INFO L125 PetriNetUnfolderBase]: For 124/160 co-relation queries the response was YES. [2024-11-13 16:29:08,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 1003 events. 586/1003 cut-off events. For 124/160 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4509 event pairs, 144 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 2076. Up to 638 conditions per place. [2024-11-13 16:29:08,608 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 45 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-11-13 16:29:08,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2024-11-13 16:29:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-13 16:29:08,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-13 16:29:08,610 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 109 flow. Second operand 5 states and 127 transitions. [2024-11-13 16:29:08,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2024-11-13 16:29:08,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 16:29:08,613 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 137 flow [2024-11-13 16:29:08,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-11-13 16:29:08,614 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2024-11-13 16:29:08,614 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 137 flow [2024-11-13 16:29:08,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:08,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:08,615 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:08,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:29:08,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:08,819 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:08,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1340503957, now seen corresponding path program 1 times [2024-11-13 16:29:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383540714] [2024-11-13 16:29:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383540714] [2024-11-13 16:29:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383540714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169150020] [2024-11-13 16:29:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:09,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:29:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:09,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:29:09,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:09,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:09,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-13 16:29:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169150020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:09,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-13 16:29:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711371711] [2024-11-13 16:29:09,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:09,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:29:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:29:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:29:10,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:10,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 137 flow. Second operand has 17 states, 17 states have (on average 20.764705882352942) internal successors, (353), 17 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:10,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:10,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:10,986 INFO L124 PetriNetUnfolderBase]: 1000/1847 cut-off events. [2024-11-13 16:29:10,986 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-13 16:29:10,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4043 conditions, 1847 events. 1000/1847 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10675 event pairs, 510 based on Foata normal form. 0/1592 useless extension candidates. Maximal degree in co-relation 2137. Up to 829 conditions per place. [2024-11-13 16:29:10,999 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 90 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-11-13 16:29:10,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 111 transitions, 552 flow [2024-11-13 16:29:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:29:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 16:29:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-11-13 16:29:11,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6380208333333334 [2024-11-13 16:29:11,001 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 137 flow. Second operand 8 states and 245 transitions. [2024-11-13 16:29:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 111 transitions, 552 flow [2024-11-13 16:29:11,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 111 transitions, 534 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 16:29:11,005 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 240 flow [2024-11-13 16:29:11,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=240, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-13 16:29:11,008 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-11-13 16:29:11,008 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 240 flow [2024-11-13 16:29:11,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.764705882352942) internal successors, (353), 17 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:11,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:11,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:11,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:11,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 16:29:11,209 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:11,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2023854278, now seen corresponding path program 1 times [2024-11-13 16:29:11,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:11,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874848692] [2024-11-13 16:29:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:11,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874848692] [2024-11-13 16:29:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874848692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16860562] [2024-11-13 16:29:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:11,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:11,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:29:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:11,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:29:11,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:11,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:11,712 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 29 treesize of output 25 [2024-11-13 16:29:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16860562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:11,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-13 16:29:11,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334846544] [2024-11-13 16:29:11,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:11,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 16:29:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:11,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 16:29:11,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:29:12,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-13 16:29:12,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 240 flow. Second operand has 14 states, 14 states have (on average 17.357142857142858) internal successors, (243), 14 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:12,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:12,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-13 16:29:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:12,742 INFO L124 PetriNetUnfolderBase]: 1213/2059 cut-off events. [2024-11-13 16:29:12,743 INFO L125 PetriNetUnfolderBase]: For 1256/1328 co-relation queries the response was YES. [2024-11-13 16:29:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5204 conditions, 2059 events. 1213/2059 cut-off events. For 1256/1328 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10814 event pairs, 580 based on Foata normal form. 0/1828 useless extension candidates. Maximal degree in co-relation 3261. Up to 1568 conditions per place. [2024-11-13 16:29:12,755 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 73 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-11-13 16:29:12,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 529 flow [2024-11-13 16:29:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:29:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:29:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-11-13 16:29:12,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-11-13 16:29:12,757 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 240 flow. Second operand 7 states and 184 transitions. [2024-11-13 16:29:12,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 529 flow [2024-11-13 16:29:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 90 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:12,763 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 293 flow [2024-11-13 16:29:12,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-11-13 16:29:12,764 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-11-13 16:29:12,764 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 293 flow [2024-11-13 16:29:12,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.357142857142858) internal successors, (243), 14 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:12,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:12,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:12,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 16:29:12,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 16:29:12,969 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:12,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash -956921637, now seen corresponding path program 2 times [2024-11-13 16:29:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133016510] [2024-11-13 16:29:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:12,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:29:13,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:13,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133016510] [2024-11-13 16:29:13,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133016510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:13,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645018692] [2024-11-13 16:29:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:13,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:29:13,352 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:29:13,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:13,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 16:29:13,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:13,371 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 [2024-11-13 16:29:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:29:13,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:29:13,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645018692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:13,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:13,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-13 16:29:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106886937] [2024-11-13 16:29:13,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:13,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 16:29:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 16:29:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:29:14,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:14,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 293 flow. Second operand has 12 states, 12 states have (on average 21.583333333333332) internal successors, (259), 12 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:14,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:14,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:14,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:14,767 INFO L124 PetriNetUnfolderBase]: 971/1767 cut-off events. [2024-11-13 16:29:14,767 INFO L125 PetriNetUnfolderBase]: For 986/986 co-relation queries the response was YES. [2024-11-13 16:29:14,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 1767 events. 971/1767 cut-off events. For 986/986 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10136 event pairs, 510 based on Foata normal form. 0/1699 useless extension candidates. Maximal degree in co-relation 2954. Up to 1152 conditions per place. [2024-11-13 16:29:14,780 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 58 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-11-13 16:29:14,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 536 flow [2024-11-13 16:29:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-13 16:29:14,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-13 16:29:14,782 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 293 flow. Second operand 5 states and 136 transitions. [2024-11-13 16:29:14,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 536 flow [2024-11-13 16:29:14,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 507 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:14,787 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 286 flow [2024-11-13 16:29:14,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-11-13 16:29:14,788 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 11 predicate places. [2024-11-13 16:29:14,788 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 286 flow [2024-11-13 16:29:14,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.583333333333332) internal successors, (259), 12 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:14,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:14,789 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:14,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:29:14,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:14,993 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:14,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -229603660, now seen corresponding path program 2 times [2024-11-13 16:29:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:14,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028975153] [2024-11-13 16:29:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:29:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028975153] [2024-11-13 16:29:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028975153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189127582] [2024-11-13 16:29:15,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:15,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:15,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:29:15,388 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:29:15,388 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:15,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:29:15,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:15,406 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 [2024-11-13 16:29:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:15,717 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:29:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189127582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:29:15,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-13 16:29:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839404025] [2024-11-13 16:29:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:15,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:29:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:29:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:29:15,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-13 16:29:15,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:15,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:15,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-13 16:29:15,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:16,358 INFO L124 PetriNetUnfolderBase]: 1263/2131 cut-off events. [2024-11-13 16:29:16,358 INFO L125 PetriNetUnfolderBase]: For 2496/2496 co-relation queries the response was YES. [2024-11-13 16:29:16,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5969 conditions, 2131 events. 1263/2131 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11048 event pairs, 162 based on Foata normal form. 16/1940 useless extension candidates. Maximal degree in co-relation 3751. Up to 1275 conditions per place. [2024-11-13 16:29:16,375 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 65 selfloop transitions, 14 changer transitions 0/82 dead transitions. [2024-11-13 16:29:16,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 585 flow [2024-11-13 16:29:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-13 16:29:16,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-13 16:29:16,377 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 286 flow. Second operand 5 states and 132 transitions. [2024-11-13 16:29:16,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 585 flow [2024-11-13 16:29:16,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 541 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 16:29:16,384 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 332 flow [2024-11-13 16:29:16,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-13 16:29:16,384 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-11-13 16:29:16,385 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 332 flow [2024-11-13 16:29:16,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:16,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:16,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:16,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:16,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:16,587 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:16,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 695226243, now seen corresponding path program 1 times [2024-11-13 16:29:16,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:16,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036741106] [2024-11-13 16:29:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:16,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:16,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036741106] [2024-11-13 16:29:16,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036741106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:16,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247709941] [2024-11-13 16:29:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:16,785 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:29:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:16,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:29:16,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:17,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:17,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-13 16:29:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:17,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247709941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:17,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:17,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-13 16:29:17,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729057154] [2024-11-13 16:29:17,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:17,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:29:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:17,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:29:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:29:17,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-13 16:29:17,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 332 flow. Second operand has 17 states, 17 states have (on average 17.294117647058822) internal successors, (294), 17 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:17,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:17,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-13 16:29:17,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:18,260 INFO L124 PetriNetUnfolderBase]: 1125/1917 cut-off events. [2024-11-13 16:29:18,260 INFO L125 PetriNetUnfolderBase]: For 1682/1682 co-relation queries the response was YES. [2024-11-13 16:29:18,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5495 conditions, 1917 events. 1125/1917 cut-off events. For 1682/1682 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9833 event pairs, 611 based on Foata normal form. 16/1862 useless extension candidates. Maximal degree in co-relation 3860. Up to 1009 conditions per place. [2024-11-13 16:29:18,274 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 87 selfloop transitions, 19 changer transitions 0/109 dead transitions. [2024-11-13 16:29:18,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 723 flow [2024-11-13 16:29:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:29:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 16:29:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-11-13 16:29:18,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5598958333333334 [2024-11-13 16:29:18,276 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 332 flow. Second operand 8 states and 215 transitions. [2024-11-13 16:29:18,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 723 flow [2024-11-13 16:29:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 711 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:18,283 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 428 flow [2024-11-13 16:29:18,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-13 16:29:18,284 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2024-11-13 16:29:18,284 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 428 flow [2024-11-13 16:29:18,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.294117647058822) internal successors, (294), 17 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:18,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:18,285 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:18,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 16:29:18,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 16:29:18,489 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:18,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1606782851, now seen corresponding path program 2 times [2024-11-13 16:29:18,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:18,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567008487] [2024-11-13 16:29:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:18,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:29:18,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:18,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567008487] [2024-11-13 16:29:18,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567008487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:18,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786806483] [2024-11-13 16:29:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:18,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:18,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:18,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:29:18,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:29:18,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:18,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:29:18,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:18,907 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 [2024-11-13 16:29:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:19,314 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:29:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786806483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:19,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:29:19,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-13 16:29:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703583887] [2024-11-13 16:29:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:19,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:29:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:29:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 16:29:19,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-11-13 16:29:19,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:19,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:19,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-11-13 16:29:19,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:20,138 INFO L124 PetriNetUnfolderBase]: 1013/1705 cut-off events. [2024-11-13 16:29:20,138 INFO L125 PetriNetUnfolderBase]: For 2337/2337 co-relation queries the response was YES. [2024-11-13 16:29:20,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1705 events. 1013/1705 cut-off events. For 2337/2337 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8499 event pairs, 74 based on Foata normal form. 32/1731 useless extension candidates. Maximal degree in co-relation 3450. Up to 780 conditions per place. [2024-11-13 16:29:20,153 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 63 selfloop transitions, 30 changer transitions 0/96 dead transitions. [2024-11-13 16:29:20,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 733 flow [2024-11-13 16:29:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:29:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:29:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-11-13 16:29:20,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-11-13 16:29:20,156 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 428 flow. Second operand 7 states and 169 transitions. [2024-11-13 16:29:20,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 733 flow [2024-11-13 16:29:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 710 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:20,170 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 462 flow [2024-11-13 16:29:20,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-11-13 16:29:20,171 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2024-11-13 16:29:20,171 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 462 flow [2024-11-13 16:29:20,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:20,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:20,172 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:20,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 16:29:20,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 16:29:20,377 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:20,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1425644588, now seen corresponding path program 1 times [2024-11-13 16:29:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251084424] [2024-11-13 16:29:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:20,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:20,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251084424] [2024-11-13 16:29:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251084424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:20,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:29:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450707620] [2024-11-13 16:29:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:20,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:29:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:20,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:29:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:29:20,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 16:29:20,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:20,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:20,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 16:29:20,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:20,663 INFO L124 PetriNetUnfolderBase]: 1032/1728 cut-off events. [2024-11-13 16:29:20,663 INFO L125 PetriNetUnfolderBase]: For 3056/3056 co-relation queries the response was YES. [2024-11-13 16:29:20,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5796 conditions, 1728 events. 1032/1728 cut-off events. For 3056/3056 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8557 event pairs, 268 based on Foata normal form. 2/1720 useless extension candidates. Maximal degree in co-relation 3892. Up to 1325 conditions per place. [2024-11-13 16:29:20,678 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 67 selfloop transitions, 9 changer transitions 1/80 dead transitions. [2024-11-13 16:29:20,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 705 flow [2024-11-13 16:29:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:29:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:29:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-13 16:29:20,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-11-13 16:29:20,680 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 462 flow. Second operand 3 states and 105 transitions. [2024-11-13 16:29:20,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 705 flow [2024-11-13 16:29:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 640 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:20,695 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 479 flow [2024-11-13 16:29:20,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-11-13 16:29:20,698 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 15 predicate places. [2024-11-13 16:29:20,698 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 479 flow [2024-11-13 16:29:20,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:20,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:20,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:20,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 16:29:20,699 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:20,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1854915162, now seen corresponding path program 1 times [2024-11-13 16:29:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:20,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947401956] [2024-11-13 16:29:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:20,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:20,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:20,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947401956] [2024-11-13 16:29:20,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947401956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:20,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:20,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:29:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455193447] [2024-11-13 16:29:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:20,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:29:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:29:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:29:20,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:20,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 479 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:20,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:20,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:20,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:21,197 INFO L124 PetriNetUnfolderBase]: 1065/1787 cut-off events. [2024-11-13 16:29:21,197 INFO L125 PetriNetUnfolderBase]: For 3311/3311 co-relation queries the response was YES. [2024-11-13 16:29:21,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5917 conditions, 1787 events. 1065/1787 cut-off events. For 3311/3311 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9387 event pairs, 346 based on Foata normal form. 18/1803 useless extension candidates. Maximal degree in co-relation 3946. Up to 986 conditions per place. [2024-11-13 16:29:21,209 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 129 selfloop transitions, 9 changer transitions 0/140 dead transitions. [2024-11-13 16:29:21,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 140 transitions, 1263 flow [2024-11-13 16:29:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-11-13 16:29:21,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-11-13 16:29:21,211 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 479 flow. Second operand 5 states and 163 transitions. [2024-11-13 16:29:21,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 140 transitions, 1263 flow [2024-11-13 16:29:21,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 140 transitions, 1228 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:21,223 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 539 flow [2024-11-13 16:29:21,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=539, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-11-13 16:29:21,224 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 21 predicate places. [2024-11-13 16:29:21,224 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 539 flow [2024-11-13 16:29:21,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:21,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:21,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:21,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 16:29:21,225 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:21,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1638195588, now seen corresponding path program 2 times [2024-11-13 16:29:21,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:21,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994530483] [2024-11-13 16:29:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:21,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994530483] [2024-11-13 16:29:21,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994530483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:21,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:21,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:29:21,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208142649] [2024-11-13 16:29:21,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:21,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:21,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:21,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:29:21,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:21,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 539 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:21,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:21,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:21,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:21,621 INFO L124 PetriNetUnfolderBase]: 911/1515 cut-off events. [2024-11-13 16:29:21,621 INFO L125 PetriNetUnfolderBase]: For 3295/3295 co-relation queries the response was YES. [2024-11-13 16:29:21,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 1515 events. 911/1515 cut-off events. For 3295/3295 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7071 event pairs, 432 based on Foata normal form. 32/1547 useless extension candidates. Maximal degree in co-relation 3604. Up to 1186 conditions per place. [2024-11-13 16:29:21,631 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 76 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-11-13 16:29:21,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 810 flow [2024-11-13 16:29:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-13 16:29:21,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-11-13 16:29:21,633 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 539 flow. Second operand 4 states and 118 transitions. [2024-11-13 16:29:21,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 810 flow [2024-11-13 16:29:21,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 783 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:21,643 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 500 flow [2024-11-13 16:29:21,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-13 16:29:21,644 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 24 predicate places. [2024-11-13 16:29:21,644 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 500 flow [2024-11-13 16:29:21,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:21,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:21,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:21,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 16:29:21,645 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:21,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash 67448977, now seen corresponding path program 1 times [2024-11-13 16:29:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:21,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947248570] [2024-11-13 16:29:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947248570] [2024-11-13 16:29:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947248570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:21,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:21,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 16:29:21,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258939362] [2024-11-13 16:29:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:21,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:29:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:29:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:29:21,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 500 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:21,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:22,291 INFO L124 PetriNetUnfolderBase]: 1051/1767 cut-off events. [2024-11-13 16:29:22,292 INFO L125 PetriNetUnfolderBase]: For 4564/4564 co-relation queries the response was YES. [2024-11-13 16:29:22,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6796 conditions, 1767 events. 1051/1767 cut-off events. For 4564/4564 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9071 event pairs, 300 based on Foata normal form. 24/1791 useless extension candidates. Maximal degree in co-relation 4498. Up to 882 conditions per place. [2024-11-13 16:29:22,303 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 116 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2024-11-13 16:29:22,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1266 flow [2024-11-13 16:29:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:29:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 16:29:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-11-13 16:29:22,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-13 16:29:22,305 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 500 flow. Second operand 6 states and 184 transitions. [2024-11-13 16:29:22,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1266 flow [2024-11-13 16:29:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 137 transitions, 1223 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:22,322 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 697 flow [2024-11-13 16:29:22,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=697, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-11-13 16:29:22,323 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 31 predicate places. [2024-11-13 16:29:22,323 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 697 flow [2024-11-13 16:29:22,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:22,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:22,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:22,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 16:29:22,324 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:22,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1534712929, now seen corresponding path program 2 times [2024-11-13 16:29:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161898975] [2024-11-13 16:29:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:22,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:22,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161898975] [2024-11-13 16:29:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161898975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:22,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 16:29:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094561195] [2024-11-13 16:29:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:22,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:29:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:29:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:29:22,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:22,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 697 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:22,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:22,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:23,050 INFO L124 PetriNetUnfolderBase]: 1301/2205 cut-off events. [2024-11-13 16:29:23,050 INFO L125 PetriNetUnfolderBase]: For 7092/7092 co-relation queries the response was YES. [2024-11-13 16:29:23,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8967 conditions, 2205 events. 1301/2205 cut-off events. For 7092/7092 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11449 event pairs, 444 based on Foata normal form. 24/2229 useless extension candidates. Maximal degree in co-relation 6760. Up to 1168 conditions per place. [2024-11-13 16:29:23,069 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 112 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-11-13 16:29:23,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 139 transitions, 1410 flow [2024-11-13 16:29:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:29:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:29:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-11-13 16:29:23,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-11-13 16:29:23,071 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 697 flow. Second operand 7 states and 197 transitions. [2024-11-13 16:29:23,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 139 transitions, 1410 flow [2024-11-13 16:29:23,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 1378 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:23,106 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 870 flow [2024-11-13 16:29:23,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-13 16:29:23,107 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 40 predicate places. [2024-11-13 16:29:23,107 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 870 flow [2024-11-13 16:29:23,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:23,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:23,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:23,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 16:29:23,108 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:23,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -539049823, now seen corresponding path program 3 times [2024-11-13 16:29:23,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:23,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300613501] [2024-11-13 16:29:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:23,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:23,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300613501] [2024-11-13 16:29:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300613501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:23,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:23,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:29:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056351332] [2024-11-13 16:29:23,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:23,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:29:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:29:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:29:23,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:23,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:23,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:23,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:23,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:23,696 INFO L124 PetriNetUnfolderBase]: 1281/2149 cut-off events. [2024-11-13 16:29:23,697 INFO L125 PetriNetUnfolderBase]: For 9652/9652 co-relation queries the response was YES. [2024-11-13 16:29:23,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9287 conditions, 2149 events. 1281/2149 cut-off events. For 9652/9652 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11144 event pairs, 406 based on Foata normal form. 6/2155 useless extension candidates. Maximal degree in co-relation 8317. Up to 1086 conditions per place. [2024-11-13 16:29:23,714 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 106 selfloop transitions, 28 changer transitions 0/135 dead transitions. [2024-11-13 16:29:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 1491 flow [2024-11-13 16:29:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-13 16:29:23,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-13 16:29:23,716 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 870 flow. Second operand 5 states and 155 transitions. [2024-11-13 16:29:23,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 1491 flow [2024-11-13 16:29:23,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1441 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-13 16:29:23,754 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 958 flow [2024-11-13 16:29:23,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=958, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2024-11-13 16:29:23,755 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 43 predicate places. [2024-11-13 16:29:23,755 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 958 flow [2024-11-13 16:29:23,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:23,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:23,755 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:23,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-13 16:29:23,756 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:23,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -489135251, now seen corresponding path program 4 times [2024-11-13 16:29:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:23,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154272312] [2024-11-13 16:29:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:23,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:23,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154272312] [2024-11-13 16:29:23,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154272312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:23,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:23,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:29:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809880748] [2024-11-13 16:29:23,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:23,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:29:23,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:29:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:29:23,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:23,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 958 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:23,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:23,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:23,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:24,417 INFO L124 PetriNetUnfolderBase]: 1275/2143 cut-off events. [2024-11-13 16:29:24,417 INFO L125 PetriNetUnfolderBase]: For 11228/11228 co-relation queries the response was YES. [2024-11-13 16:29:24,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 2143 events. 1275/2143 cut-off events. For 11228/11228 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10923 event pairs, 590 based on Foata normal form. 6/2149 useless extension candidates. Maximal degree in co-relation 8658. Up to 1690 conditions per place. [2024-11-13 16:29:24,436 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 84 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-11-13 16:29:24,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1493 flow [2024-11-13 16:29:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:29:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:29:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-11-13 16:29:24,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-13 16:29:24,437 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 958 flow. Second operand 5 states and 145 transitions. [2024-11-13 16:29:24,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1493 flow [2024-11-13 16:29:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 120 transitions, 1437 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:24,476 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 1220 flow [2024-11-13 16:29:24,477 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1220, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-11-13 16:29:24,477 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 48 predicate places. [2024-11-13 16:29:24,478 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 1220 flow [2024-11-13 16:29:24,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:24,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:24,478 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:24,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 16:29:24,479 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:24,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1014696087, now seen corresponding path program 5 times [2024-11-13 16:29:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911787303] [2024-11-13 16:29:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:24,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911787303] [2024-11-13 16:29:24,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911787303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:24,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:24,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 16:29:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803887053] [2024-11-13 16:29:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:24,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:29:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:29:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:29:24,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:24,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:24,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:24,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:24,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:25,125 INFO L124 PetriNetUnfolderBase]: 1233/2059 cut-off events. [2024-11-13 16:29:25,125 INFO L125 PetriNetUnfolderBase]: For 11890/11890 co-relation queries the response was YES. [2024-11-13 16:29:25,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9303 conditions, 2059 events. 1233/2059 cut-off events. For 11890/11890 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10233 event pairs, 538 based on Foata normal form. 24/2083 useless extension candidates. Maximal degree in co-relation 8449. Up to 1558 conditions per place. [2024-11-13 16:29:25,138 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 94 selfloop transitions, 37 changer transitions 0/132 dead transitions. [2024-11-13 16:29:25,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1657 flow [2024-11-13 16:29:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:29:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 16:29:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-11-13 16:29:25,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-13 16:29:25,140 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 1220 flow. Second operand 6 states and 171 transitions. [2024-11-13 16:29:25,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1657 flow [2024-11-13 16:29:25,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 132 transitions, 1607 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:25,191 INFO L231 Difference]: Finished difference. Result has 102 places, 103 transitions, 1309 flow [2024-11-13 16:29:25,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=102, PETRI_TRANSITIONS=103} [2024-11-13 16:29:25,191 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 55 predicate places. [2024-11-13 16:29:25,192 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 103 transitions, 1309 flow [2024-11-13 16:29:25,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:25,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:25,192 INFO L204 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] [2024-11-13 16:29:25,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 16:29:25,192 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:25,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:25,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1904136919, now seen corresponding path program 1 times [2024-11-13 16:29:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:25,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647274705] [2024-11-13 16:29:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:25,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:25,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647274705] [2024-11-13 16:29:25,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647274705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:25,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949283165] [2024-11-13 16:29:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:25,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:25,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:25,522 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:25,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:29:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:25,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 16:29:25,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:25,704 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 15 treesize of output 7 [2024-11-13 16:29:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:25,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:25,815 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 16:29:25,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 16:29:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:29:25,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949283165] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:25,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:25,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 4] total 12 [2024-11-13 16:29:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009625485] [2024-11-13 16:29:25,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:25,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:29:25,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 16:29:25,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 103 transitions, 1309 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:25,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:25,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 16:29:25,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:26,403 INFO L124 PetriNetUnfolderBase]: 1816/3150 cut-off events. [2024-11-13 16:29:26,404 INFO L125 PetriNetUnfolderBase]: For 14693/14693 co-relation queries the response was YES. [2024-11-13 16:29:26,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13120 conditions, 3150 events. 1816/3150 cut-off events. For 14693/14693 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17415 event pairs, 272 based on Foata normal form. 4/3140 useless extension candidates. Maximal degree in co-relation 12267. Up to 1669 conditions per place. [2024-11-13 16:29:26,432 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 109 selfloop transitions, 60 changer transitions 1/173 dead transitions. [2024-11-13 16:29:26,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 173 transitions, 2130 flow [2024-11-13 16:29:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-13 16:29:26,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.765625 [2024-11-13 16:29:26,434 INFO L175 Difference]: Start difference. First operand has 102 places, 103 transitions, 1309 flow. Second operand 4 states and 147 transitions. [2024-11-13 16:29:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 173 transitions, 2130 flow [2024-11-13 16:29:26,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 173 transitions, 2046 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:26,494 INFO L231 Difference]: Finished difference. Result has 105 places, 130 transitions, 1701 flow [2024-11-13 16:29:26,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1701, PETRI_PLACES=105, PETRI_TRANSITIONS=130} [2024-11-13 16:29:26,495 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 58 predicate places. [2024-11-13 16:29:26,495 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 130 transitions, 1701 flow [2024-11-13 16:29:26,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:26,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:26,495 INFO L204 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] [2024-11-13 16:29:26,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 16:29:26,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 16:29:26,696 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:26,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -831919287, now seen corresponding path program 2 times [2024-11-13 16:29:26,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:26,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402703084] [2024-11-13 16:29:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:26,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402703084] [2024-11-13 16:29:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402703084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:26,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:26,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 16:29:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981566298] [2024-11-13 16:29:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:26,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:29:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:29:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:29:26,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 130 transitions, 1701 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2024-11-13 16:29:26,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:26,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:26,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:27,641 INFO L124 PetriNetUnfolderBase]: 2139/3575 cut-off events. [2024-11-13 16:29:27,641 INFO L125 PetriNetUnfolderBase]: For 18178/18178 co-relation queries the response was YES. [2024-11-13 16:29:27,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 3575 events. 2139/3575 cut-off events. For 18178/18178 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 19211 event pairs, 958 based on Foata normal form. 16/3591 useless extension candidates. Maximal degree in co-relation 15215. Up to 2474 conditions per place. [2024-11-13 16:29:27,663 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 175 selfloop transitions, 42 changer transitions 0/218 dead transitions. [2024-11-13 16:29:27,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 218 transitions, 3036 flow [2024-11-13 16:29:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:29:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:29:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-11-13 16:29:27,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-13 16:29:27,664 INFO L175 Difference]: Start difference. First operand has 105 places, 130 transitions, 1701 flow. Second operand 7 states and 208 transitions. [2024-11-13 16:29:27,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 218 transitions, 3036 flow [2024-11-13 16:29:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 218 transitions, 3022 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-13 16:29:27,739 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 2124 flow [2024-11-13 16:29:27,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2124, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2024-11-13 16:29:27,739 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 69 predicate places. [2024-11-13 16:29:27,740 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 2124 flow [2024-11-13 16:29:27,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 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) [2024-11-13 16:29:27,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:27,740 INFO L204 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] [2024-11-13 16:29:27,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 16:29:27,740 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:27,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1667771761, now seen corresponding path program 3 times [2024-11-13 16:29:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:27,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807650431] [2024-11-13 16:29:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:27,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807650431] [2024-11-13 16:29:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807650431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:27,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383634859] [2024-11-13 16:29:27,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:29:27,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:27,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:27,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:29:28,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:29:28,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:28,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 16:29:28,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:28,198 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 15 treesize of output 7 [2024-11-13 16:29:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:28,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:28,261 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 16:29:28,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 16:29:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:29:28,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383634859] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:28,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 12 [2024-11-13 16:29:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171550240] [2024-11-13 16:29:28,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:28,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:28,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:29:28,333 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 16:29:28,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 2124 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:28,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:28,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 16:29:28,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:29,095 INFO L124 PetriNetUnfolderBase]: 2484/4312 cut-off events. [2024-11-13 16:29:29,095 INFO L125 PetriNetUnfolderBase]: For 24229/24229 co-relation queries the response was YES. [2024-11-13 16:29:29,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20004 conditions, 4312 events. 2484/4312 cut-off events. For 24229/24229 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25682 event pairs, 646 based on Foata normal form. 4/4298 useless extension candidates. Maximal degree in co-relation 18899. Up to 2733 conditions per place. [2024-11-13 16:29:29,119 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 142 selfloop transitions, 77 changer transitions 1/223 dead transitions. [2024-11-13 16:29:29,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 223 transitions, 3237 flow [2024-11-13 16:29:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:29,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-11-13 16:29:29,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7552083333333334 [2024-11-13 16:29:29,120 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 2124 flow. Second operand 4 states and 145 transitions. [2024-11-13 16:29:29,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 223 transitions, 3237 flow [2024-11-13 16:29:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 223 transitions, 3178 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-13 16:29:29,197 INFO L231 Difference]: Finished difference. Result has 120 places, 179 transitions, 2745 flow [2024-11-13 16:29:29,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2745, PETRI_PLACES=120, PETRI_TRANSITIONS=179} [2024-11-13 16:29:29,197 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 73 predicate places. [2024-11-13 16:29:29,197 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 179 transitions, 2745 flow [2024-11-13 16:29:29,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:29,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:29,198 INFO L204 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] [2024-11-13 16:29:29,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 16:29:29,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 16:29:29,398 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:29,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 72230349, now seen corresponding path program 1 times [2024-11-13 16:29:29,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:29,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716495489] [2024-11-13 16:29:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:29,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716495489] [2024-11-13 16:29:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716495489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574252971] [2024-11-13 16:29:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:29,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:29,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:29:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:29,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:29:29,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:29,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574252971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:29,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:29,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-13 16:29:29,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024621570] [2024-11-13 16:29:29,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:29,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:29:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:29:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:29:29,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:29,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 179 transitions, 2745 flow. Second operand has 11 states, 11 states have (on average 22.181818181818183) internal successors, (244), 11 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:29,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:31,577 INFO L124 PetriNetUnfolderBase]: 3417/6075 cut-off events. [2024-11-13 16:29:31,577 INFO L125 PetriNetUnfolderBase]: For 33664/33672 co-relation queries the response was YES. [2024-11-13 16:29:31,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27966 conditions, 6075 events. 3417/6075 cut-off events. For 33664/33672 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 39740 event pairs, 1107 based on Foata normal form. 26/6101 useless extension candidates. Maximal degree in co-relation 26729. Up to 2642 conditions per place. [2024-11-13 16:29:31,621 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 292 selfloop transitions, 139 changer transitions 5/438 dead transitions. [2024-11-13 16:29:31,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 438 transitions, 5768 flow [2024-11-13 16:29:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:29:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 16:29:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 533 transitions. [2024-11-13 16:29:31,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5844298245614035 [2024-11-13 16:29:31,624 INFO L175 Difference]: Start difference. First operand has 120 places, 179 transitions, 2745 flow. Second operand 19 states and 533 transitions. [2024-11-13 16:29:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 438 transitions, 5768 flow [2024-11-13 16:29:31,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 438 transitions, 5712 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-11-13 16:29:31,733 INFO L231 Difference]: Finished difference. Result has 150 places, 273 transitions, 4276 flow [2024-11-13 16:29:31,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4276, PETRI_PLACES=150, PETRI_TRANSITIONS=273} [2024-11-13 16:29:31,734 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 103 predicate places. [2024-11-13 16:29:31,734 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 273 transitions, 4276 flow [2024-11-13 16:29:31,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.181818181818183) internal successors, (244), 11 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:31,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:31,734 INFO L204 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] [2024-11-13 16:29:31,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 16:29:31,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 16:29:31,935 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:31,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash -560255441, now seen corresponding path program 2 times [2024-11-13 16:29:31,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:31,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165376387] [2024-11-13 16:29:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165376387] [2024-11-13 16:29:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165376387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110031897] [2024-11-13 16:29:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:32,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:32,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:32,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:32,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:29:32,444 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:29:32,444 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:32,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:29:32,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:32,561 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110031897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:32,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-13 16:29:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235198822] [2024-11-13 16:29:32,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:32,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 16:29:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 16:29:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:29:32,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:32,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 273 transitions, 4276 flow. Second operand has 18 states, 18 states have (on average 20.38888888888889) internal successors, (367), 18 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:32,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:32,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:32,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:36,136 INFO L124 PetriNetUnfolderBase]: 4821/8555 cut-off events. [2024-11-13 16:29:36,136 INFO L125 PetriNetUnfolderBase]: For 66362/66362 co-relation queries the response was YES. [2024-11-13 16:29:36,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45389 conditions, 8555 events. 4821/8555 cut-off events. For 66362/66362 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 59947 event pairs, 1016 based on Foata normal form. 104/8659 useless extension candidates. Maximal degree in co-relation 44071. Up to 2810 conditions per place. [2024-11-13 16:29:36,198 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 439 selfloop transitions, 335 changer transitions 0/775 dead transitions. [2024-11-13 16:29:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 775 transitions, 11551 flow [2024-11-13 16:29:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 16:29:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-13 16:29:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 738 transitions. [2024-11-13 16:29:36,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-11-13 16:29:36,202 INFO L175 Difference]: Start difference. First operand has 150 places, 273 transitions, 4276 flow. Second operand 25 states and 738 transitions. [2024-11-13 16:29:36,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 775 transitions, 11551 flow [2024-11-13 16:29:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 775 transitions, 11255 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-11-13 16:29:36,492 INFO L231 Difference]: Finished difference. Result has 190 places, 531 transitions, 8734 flow [2024-11-13 16:29:36,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8734, PETRI_PLACES=190, PETRI_TRANSITIONS=531} [2024-11-13 16:29:36,493 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 143 predicate places. [2024-11-13 16:29:36,493 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 531 transitions, 8734 flow [2024-11-13 16:29:36,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.38888888888889) internal successors, (367), 18 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:36,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:36,494 INFO L204 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] [2024-11-13 16:29:36,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 16:29:36,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:29:36,694 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:36,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2075354087, now seen corresponding path program 3 times [2024-11-13 16:29:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:36,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132713645] [2024-11-13 16:29:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:36,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:36,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:36,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132713645] [2024-11-13 16:29:36,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132713645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:36,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934880844] [2024-11-13 16:29:36,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:29:36,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:36,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:29:37,046 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:29:37,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:37,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:29:37,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:37,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934880844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:37,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:37,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-13 16:29:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934206421] [2024-11-13 16:29:37,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:37,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 16:29:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 16:29:37,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:29:37,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:29:37,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 531 transitions, 8734 flow. Second operand has 14 states, 14 states have (on average 20.857142857142858) internal successors, (292), 14 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:37,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:37,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:29:37,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:41,142 INFO L124 PetriNetUnfolderBase]: 6051/10941 cut-off events. [2024-11-13 16:29:41,142 INFO L125 PetriNetUnfolderBase]: For 126411/126411 co-relation queries the response was YES. [2024-11-13 16:29:41,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69474 conditions, 10941 events. 6051/10941 cut-off events. For 126411/126411 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 81999 event pairs, 1982 based on Foata normal form. 20/10961 useless extension candidates. Maximal degree in co-relation 67845. Up to 6178 conditions per place. [2024-11-13 16:29:41,270 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 611 selfloop transitions, 372 changer transitions 14/998 dead transitions. [2024-11-13 16:29:41,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 998 transitions, 17273 flow [2024-11-13 16:29:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:29:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 16:29:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 648 transitions. [2024-11-13 16:29:41,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 16:29:41,272 INFO L175 Difference]: Start difference. First operand has 190 places, 531 transitions, 8734 flow. Second operand 24 states and 648 transitions. [2024-11-13 16:29:41,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 998 transitions, 17273 flow [2024-11-13 16:29:42,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 998 transitions, 16073 flow, removed 556 selfloop flow, removed 4 redundant places. [2024-11-13 16:29:42,380 INFO L231 Difference]: Finished difference. Result has 227 places, 796 transitions, 14055 flow [2024-11-13 16:29:42,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7937, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14055, PETRI_PLACES=227, PETRI_TRANSITIONS=796} [2024-11-13 16:29:42,381 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 180 predicate places. [2024-11-13 16:29:42,381 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 796 transitions, 14055 flow [2024-11-13 16:29:42,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.857142857142858) internal successors, (292), 14 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:42,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:42,381 INFO L204 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] [2024-11-13 16:29:42,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 16:29:42,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 16:29:42,582 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:29:42,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:42,582 INFO L85 PathProgramCache]: Analyzing trace with hash 714112072, now seen corresponding path program 1 times [2024-11-13 16:29:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122395543] [2024-11-13 16:29:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122395543] [2024-11-13 16:29:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122395543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:42,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466072449] [2024-11-13 16:29:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:42,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:42,803 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:42,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:29:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:42,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 16:29:42,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:42,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:29:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:43,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:43,599 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 90 treesize of output 80 [2024-11-13 16:29:43,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:29:43,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2024-11-13 16:29:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466072449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:47,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-13 16:29:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627331680] [2024-11-13 16:29:47,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:47,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:29:47,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:29:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:29:48,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 16:29:48,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 796 transitions, 14055 flow. Second operand has 20 states, 20 states have (on average 22.15) internal successors, (443), 20 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:48,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:48,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 16:29:48,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:58,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:30:02,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:30:09,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:30:15,666 INFO L124 PetriNetUnfolderBase]: 9476/16797 cut-off events. [2024-11-13 16:30:15,666 INFO L125 PetriNetUnfolderBase]: For 239695/239705 co-relation queries the response was YES. [2024-11-13 16:30:15,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114546 conditions, 16797 events. 9476/16797 cut-off events. For 239695/239705 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 129373 event pairs, 769 based on Foata normal form. 77/16874 useless extension candidates. Maximal degree in co-relation 113193. Up to 3526 conditions per place. [2024-11-13 16:30:15,845 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 779 selfloop transitions, 585 changer transitions 775/2167 dead transitions. [2024-11-13 16:30:15,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 2167 transitions, 37785 flow [2024-11-13 16:30:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 16:30:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-13 16:30:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1769 transitions. [2024-11-13 16:30:15,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5849867724867724 [2024-11-13 16:30:15,849 INFO L175 Difference]: Start difference. First operand has 227 places, 796 transitions, 14055 flow. Second operand 63 states and 1769 transitions. [2024-11-13 16:30:15,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 2167 transitions, 37785 flow [2024-11-13 16:30:18,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 2167 transitions, 36459 flow, removed 608 selfloop flow, removed 6 redundant places. [2024-11-13 16:30:18,215 INFO L231 Difference]: Finished difference. Result has 313 places, 919 transitions, 16981 flow [2024-11-13 16:30:18,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=13453, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=16981, PETRI_PLACES=313, PETRI_TRANSITIONS=919} [2024-11-13 16:30:18,216 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 266 predicate places. [2024-11-13 16:30:18,216 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 919 transitions, 16981 flow [2024-11-13 16:30:18,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.15) internal successors, (443), 20 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:18,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:18,217 INFO L204 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] [2024-11-13 16:30:18,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:30:18,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 16:30:18,417 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:30:18,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1122125251, now seen corresponding path program 4 times [2024-11-13 16:30:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:18,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463330474] [2024-11-13 16:30:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:18,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463330474] [2024-11-13 16:30:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463330474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:18,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890290891] [2024-11-13 16:30:18,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:30:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:18,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:30:18,803 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:30:18,803 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:18,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:30:18,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:18,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890290891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:18,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:18,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-13 16:30:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816537512] [2024-11-13 16:30:18,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:18,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:30:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:30:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:30:19,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:30:19,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 919 transitions, 16981 flow. Second operand has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:19,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:19,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:30:19,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:27,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:30:31,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:30:35,495 INFO L124 PetriNetUnfolderBase]: 7452/13199 cut-off events. [2024-11-13 16:30:35,495 INFO L125 PetriNetUnfolderBase]: For 247577/247577 co-relation queries the response was YES. [2024-11-13 16:30:35,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98979 conditions, 13199 events. 7452/13199 cut-off events. For 247577/247577 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 97869 event pairs, 2127 based on Foata normal form. 208/13407 useless extension candidates. Maximal degree in co-relation 98403. Up to 6862 conditions per place. [2024-11-13 16:30:35,736 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 875 selfloop transitions, 686 changer transitions 0/1562 dead transitions. [2024-11-13 16:30:35,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1562 transitions, 30829 flow [2024-11-13 16:30:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 16:30:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-13 16:30:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1060 transitions. [2024-11-13 16:30:35,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-11-13 16:30:35,739 INFO L175 Difference]: Start difference. First operand has 313 places, 919 transitions, 16981 flow. Second operand 41 states and 1060 transitions. [2024-11-13 16:30:35,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1562 transitions, 30829 flow [2024-11-13 16:30:38,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1562 transitions, 28329 flow, removed 1032 selfloop flow, removed 20 redundant places. [2024-11-13 16:30:38,365 INFO L231 Difference]: Finished difference. Result has 344 places, 1215 transitions, 23371 flow [2024-11-13 16:30:38,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=15110, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=23371, PETRI_PLACES=344, PETRI_TRANSITIONS=1215} [2024-11-13 16:30:38,367 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 297 predicate places. [2024-11-13 16:30:38,367 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 1215 transitions, 23371 flow [2024-11-13 16:30:38,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:38,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:38,367 INFO L204 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] [2024-11-13 16:30:38,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 16:30:38,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 16:30:38,569 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:30:38,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 607663859, now seen corresponding path program 5 times [2024-11-13 16:30:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586724940] [2024-11-13 16:30:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586724940] [2024-11-13 16:30:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586724940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829736251] [2024-11-13 16:30:38,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:30:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:38,849 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:38,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:30:38,939 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:30:38,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:38,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:30:38,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:39,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:39,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829736251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:39,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-13 16:30:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317441925] [2024-11-13 16:30:39,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:39,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 16:30:39,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 16:30:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:30:39,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:30:39,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1215 transitions, 23371 flow. Second operand has 15 states, 15 states have (on average 20.533333333333335) internal successors, (308), 15 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:39,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:39,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:30:39,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:57,413 INFO L124 PetriNetUnfolderBase]: 10013/17820 cut-off events. [2024-11-13 16:30:57,413 INFO L125 PetriNetUnfolderBase]: For 406041/406041 co-relation queries the response was YES. [2024-11-13 16:30:57,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144785 conditions, 17820 events. 10013/17820 cut-off events. For 406041/406041 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 140463 event pairs, 1399 based on Foata normal form. 64/17884 useless extension candidates. Maximal degree in co-relation 144487. Up to 4973 conditions per place. [2024-11-13 16:30:57,740 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 450 selfloop transitions, 1825 changer transitions 5/2281 dead transitions. [2024-11-13 16:30:57,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2281 transitions, 47851 flow [2024-11-13 16:30:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 16:30:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-13 16:30:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 891 transitions. [2024-11-13 16:30:57,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.580078125 [2024-11-13 16:30:57,743 INFO L175 Difference]: Start difference. First operand has 344 places, 1215 transitions, 23371 flow. Second operand 32 states and 891 transitions. [2024-11-13 16:30:57,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 2281 transitions, 47851 flow [2024-11-13 16:31:03,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 2281 transitions, 46370 flow, removed 729 selfloop flow, removed 2 redundant places. [2024-11-13 16:31:03,634 INFO L231 Difference]: Finished difference. Result has 392 places, 2067 transitions, 45864 flow [2024-11-13 16:31:03,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=22322, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=45864, PETRI_PLACES=392, PETRI_TRANSITIONS=2067} [2024-11-13 16:31:03,635 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 345 predicate places. [2024-11-13 16:31:03,635 INFO L471 AbstractCegarLoop]: Abstraction has has 392 places, 2067 transitions, 45864 flow [2024-11-13 16:31:03,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.533333333333335) internal successors, (308), 15 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:03,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:03,635 INFO L204 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] [2024-11-13 16:31:03,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 16:31:03,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:31:03,836 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:31:03,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1594055979, now seen corresponding path program 6 times [2024-11-13 16:31:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506592883] [2024-11-13 16:31:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:04,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:04,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506592883] [2024-11-13 16:31:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506592883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:31:04,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594105574] [2024-11-13 16:31:04,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:31:04,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:31:04,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:31:04,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:31:04,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 16:31:04,215 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 16:31:04,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:31:04,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:31:04,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:31:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:04,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:31:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:04,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594105574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:31:04,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:31:04,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-13 16:31:04,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883884783] [2024-11-13 16:31:04,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:31:04,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 16:31:04,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 16:31:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:31:04,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:31:04,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 2067 transitions, 45864 flow. Second operand has 15 states, 15 states have (on average 20.533333333333335) internal successors, (308), 15 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:04,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:04,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:31:04,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:31:27,055 INFO L124 PetriNetUnfolderBase]: 12510/22564 cut-off events. [2024-11-13 16:31:27,055 INFO L125 PetriNetUnfolderBase]: For 633932/633932 co-relation queries the response was YES. [2024-11-13 16:31:27,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201978 conditions, 22564 events. 12510/22564 cut-off events. For 633932/633932 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 187915 event pairs, 1905 based on Foata normal form. 110/22674 useless extension candidates. Maximal degree in co-relation 201058. Up to 6290 conditions per place. [2024-11-13 16:31:27,551 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 520 selfloop transitions, 2392 changer transitions 6/2919 dead transitions. [2024-11-13 16:31:27,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 2919 transitions, 69000 flow [2024-11-13 16:31:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 16:31:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-13 16:31:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 998 transitions. [2024-11-13 16:31:27,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5619369369369369 [2024-11-13 16:31:27,554 INFO L175 Difference]: Start difference. First operand has 392 places, 2067 transitions, 45864 flow. Second operand 37 states and 998 transitions. [2024-11-13 16:31:27,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 2919 transitions, 69000 flow [2024-11-13 16:31:44,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 2919 transitions, 65144 flow, removed 1622 selfloop flow, removed 7 redundant places. [2024-11-13 16:31:44,275 INFO L231 Difference]: Finished difference. Result has 444 places, 2701 transitions, 65477 flow [2024-11-13 16:31:44,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=42737, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1777, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=65477, PETRI_PLACES=444, PETRI_TRANSITIONS=2701} [2024-11-13 16:31:44,276 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 397 predicate places. [2024-11-13 16:31:44,276 INFO L471 AbstractCegarLoop]: Abstraction has has 444 places, 2701 transitions, 65477 flow [2024-11-13 16:31:44,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.533333333333335) internal successors, (308), 15 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:44,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:44,277 INFO L204 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] [2024-11-13 16:31:44,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 16:31:44,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 16:31:44,477 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-13 16:31:44,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 515842901, now seen corresponding path program 7 times [2024-11-13 16:31:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694533656] [2024-11-13 16:31:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:44,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694533656] [2024-11-13 16:31:44,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694533656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:31:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568432496] [2024-11-13 16:31:44,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:31:44,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:31:44,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:31:44,703 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:31:44,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9970aecd-daf4-44ff-be66-834995d1fb0b/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:31:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:44,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:31:44,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:31:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:44,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:31:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:31:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568432496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:31:45,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:31:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-13 16:31:45,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946990348] [2024-11-13 16:31:45,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:31:45,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:31:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:31:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:31:45,029 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 16:31:45,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 2701 transitions, 65477 flow. Second operand has 16 states, 16 states have (on average 20.5625) internal successors, (329), 16 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:31:45,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:45,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 16:31:45,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand