./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:18:13,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:18:13,995 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 01:18:14,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:18:14,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:18:14,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:18:14,041 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:18:14,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:18:14,042 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:18:14,042 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:18:14,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:18:14,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:18:14,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:18:14,043 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:18:14,043 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:18:14,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:18:14,043 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:18:14,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:18:14,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:18:14,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:18:14,045 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:18:14,046 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:18:14,047 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:18:14,047 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:18:14,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:18:14,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:18:14,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:18:14,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:18:14,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:18:14,048 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:18:14,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:18:14,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:18:14,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:18:14,049 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_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-24 01:18:14,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:18:14,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:18:14,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:18:14,407 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:18:14,408 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:18:14,410 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-24 01:18:17,450 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/841c4b9ff/38df78bc1e214d209673d97c2b11dd29/FLAG1de6de193 [2024-11-24 01:18:17,743 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:18:17,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-24 01:18:17,764 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/841c4b9ff/38df78bc1e214d209673d97c2b11dd29/FLAG1de6de193 [2024-11-24 01:18:17,804 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/841c4b9ff/38df78bc1e214d209673d97c2b11dd29 [2024-11-24 01:18:17,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:18:17,815 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:18:17,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:18:17,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:18:17,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:18:17,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:18:17" (1/1) ... [2024-11-24 01:18:17,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528c441e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:17, skipping insertion in model container [2024-11-24 01:18:17,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:18:17" (1/1) ... [2024-11-24 01:18:17,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:18:18,076 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:18:18,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:18:18,099 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:18:18,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:18:18,160 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:18:18,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18 WrapperNode [2024-11-24 01:18:18,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:18:18,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:18:18,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:18:18,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:18:18,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,215 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 146 [2024-11-24 01:18:18,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:18:18,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:18:18,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:18:18,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:18:18,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,232 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,260 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-24 01:18:18,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,269 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:18:18,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:18:18,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:18:18,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:18:18,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (1/1) ... [2024-11-24 01:18:18,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:18:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:18,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:18:18,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:18:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:18:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:18:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:18:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:18:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:18:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:18:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:18:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:18:18,376 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:18:18,498 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:18:18,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:18:18,837 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:18:18,837 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:18:19,134 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:18:19,134 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-24 01:18:19,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:18:19 BoogieIcfgContainer [2024-11-24 01:18:19,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:18:19,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:18:19,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:18:19,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:18:19,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:18:17" (1/3) ... [2024-11-24 01:18:19,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bce8aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:18:19, skipping insertion in model container [2024-11-24 01:18:19,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:18:18" (2/3) ... [2024-11-24 01:18:19,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bce8aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:18:19, skipping insertion in model container [2024-11-24 01:18:19,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:18:19" (3/3) ... [2024-11-24 01:18:19,145 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-24 01:18:19,161 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:18:19,162 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-4.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-24 01:18:19,162 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:18:19,254 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:18:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-11-24 01:18:19,325 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-11-24 01:18:19,328 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:18:19,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-24 01:18:19,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-11-24 01:18:19,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-11-24 01:18:19,343 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:18:19,355 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;@22fdb925, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:18:19,355 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-24 01:18:19,360 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:18:19,361 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 01:18:19,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 01:18:19,361 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:19,362 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:18:19,362 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:19,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 515294, now seen corresponding path program 1 times [2024-11-24 01:18:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:19,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097548618] [2024-11-24 01:18:19,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:19,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:19,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097548618] [2024-11-24 01:18:19,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097548618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:19,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:18:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691087073] [2024-11-24 01:18:19,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:19,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:18:19,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:19,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:18:19,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:18:19,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:19,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:19,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:19,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:19,928 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-11-24 01:18:19,928 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-24 01:18:19,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-11-24 01:18:19,935 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-24 01:18:19,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-11-24 01:18:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:18:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:18:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-24 01:18:19,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-24 01:18:19,955 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-11-24 01:18:19,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-11-24 01:18:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:18:19,965 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-11-24 01:18:19,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-24 01:18:19,972 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-24 01:18:19,973 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-11-24 01:18:19,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:19,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:19,973 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:18:19,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:18:19,973 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:19,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 515295, now seen corresponding path program 1 times [2024-11-24 01:18:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:19,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126661400] [2024-11-24 01:18:19,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:20,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:20,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126661400] [2024-11-24 01:18:20,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126661400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:20,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:20,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:18:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50742941] [2024-11-24 01:18:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:20,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:20,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:20,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:20,523 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:20,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:20,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:20,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:20,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:20,662 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-11-24 01:18:20,662 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:18:20,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1147 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-24 01:18:20,665 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-24 01:18:20,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-11-24 01:18:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:18:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:18:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-24 01:18:20,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-24 01:18:20,666 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-11-24 01:18:20,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-11-24 01:18:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:20,669 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-11-24 01:18:20,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-24 01:18:20,670 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-24 01:18:20,670 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-11-24 01:18:20,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:20,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:20,670 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 01:18:20,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:18:20,670 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:20,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash 495215031, now seen corresponding path program 1 times [2024-11-24 01:18:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:20,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49425177] [2024-11-24 01:18:20,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:20,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49425177] [2024-11-24 01:18:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49425177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972104979] [2024-11-24 01:18:21,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:21,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:18:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:21,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:18:21,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:21,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:21,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:21,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972104979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:21,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:21,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 01:18:21,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063847471] [2024-11-24 01:18:21,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:21,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:18:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:21,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:18:21,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:18:21,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:21,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:21,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:21,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:21,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:22,180 INFO L124 PetriNetUnfolderBase]: 102/255 cut-off events. [2024-11-24 01:18:22,180 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:18:22,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 255 events. 102/255 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1147 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 176 conditions per place. [2024-11-24 01:18:22,183 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 19 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-11-24 01:18:22,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-11-24 01:18:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-11-24 01:18:22,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-11-24 01:18:22,188 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 5 states and 101 transitions. [2024-11-24 01:18:22,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-11-24 01:18:22,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:18:22,190 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-11-24 01:18:22,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-24 01:18:22,193 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-11-24 01:18:22,194 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-11-24 01:18:22,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:22,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:22,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-24 01:18:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 01:18:22,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:22,399 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:22,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1826262035, now seen corresponding path program 1 times [2024-11-24 01:18:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:22,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410811594] [2024-11-24 01:18:22,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:22,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410811594] [2024-11-24 01:18:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410811594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:22,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:18:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121804342] [2024-11-24 01:18:22,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:22,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:18:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:22,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:18:22,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:18:22,501 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:22,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:22,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:22,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:22,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:22,612 INFO L124 PetriNetUnfolderBase]: 101/254 cut-off events. [2024-11-24 01:18:22,612 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-24 01:18:22,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 254 events. 101/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1142 event pairs, 75 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 426. Up to 177 conditions per place. [2024-11-24 01:18:22,617 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-24 01:18:22,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 146 flow [2024-11-24 01:18:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:18:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:18:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-24 01:18:22,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-24 01:18:22,618 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 3 states and 72 transitions. [2024-11-24 01:18:22,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 146 flow [2024-11-24 01:18:22,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-24 01:18:22,621 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-11-24 01:18:22,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-24 01:18:22,622 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-24 01:18:22,622 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-11-24 01:18:22,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:22,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:22,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:22,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 01:18:22,623 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:22,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash -259219436, now seen corresponding path program 1 times [2024-11-24 01:18:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284407877] [2024-11-24 01:18:22,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:22,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:22,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284407877] [2024-11-24 01:18:22,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284407877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:22,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:22,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:18:22,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686451866] [2024-11-24 01:18:22,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:22,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:22,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:22,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:22,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:22,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-24 01:18:22,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-24 01:18:22,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:22,876 INFO L124 PetriNetUnfolderBase]: 101/217 cut-off events. [2024-11-24 01:18:22,877 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-24 01:18:22,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 217 events. 101/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 776 event pairs, 75 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 392. Up to 174 conditions per place. [2024-11-24 01:18:22,882 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-24 01:18:22,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 134 flow [2024-11-24 01:18:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-24 01:18:22,885 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-24 01:18:22,885 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 4 states and 67 transitions. [2024-11-24 01:18:22,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 134 flow [2024-11-24 01:18:22,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:22,889 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 82 flow [2024-11-24 01:18:22,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-24 01:18:22,890 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-11-24 01:18:22,891 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 82 flow [2024-11-24 01:18:22,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:22,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:22,892 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:22,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 01:18:22,892 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:22,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -259219435, now seen corresponding path program 1 times [2024-11-24 01:18:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:22,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846700987] [2024-11-24 01:18:22,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:23,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846700987] [2024-11-24 01:18:23,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846700987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494863566] [2024-11-24 01:18:23,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:23,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:23,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:18:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:23,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 01:18:23,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:23,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:23,448 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 [2024-11-24 01:18:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494863566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:23,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 01:18:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105995727] [2024-11-24 01:18:23,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:23,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:18:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:23,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:18:23,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:18:23,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:23,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:23,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:23,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:23,922 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-11-24 01:18:23,922 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:18:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 387 events. 200/387 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1622 event pairs, 75 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 735. Up to 189 conditions per place. [2024-11-24 01:18:23,925 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-24 01:18:23,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 199 flow [2024-11-24 01:18:23,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-24 01:18:23,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-24 01:18:23,929 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 82 flow. Second operand 4 states and 100 transitions. [2024-11-24 01:18:23,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 199 flow [2024-11-24 01:18:23,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:23,930 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 93 flow [2024-11-24 01:18:23,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-24 01:18:23,931 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-24 01:18:23,931 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 93 flow [2024-11-24 01:18:23,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:23,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:23,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:23,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:18:24,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:24,136 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:24,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:24,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1994303, now seen corresponding path program 1 times [2024-11-24 01:18:24,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319576097] [2024-11-24 01:18:24,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:24,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:24,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:24,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319576097] [2024-11-24 01:18:24,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319576097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:24,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536212712] [2024-11-24 01:18:24,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:24,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:24,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:24,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:18:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:24,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 01:18:24,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:24,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:24,627 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 [2024-11-24 01:18:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536212712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:24,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 01:18:24,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954128359] [2024-11-24 01:18:24,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:24,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:18:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:24,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:18:24,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:18:24,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:18:24,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:24,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:24,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:18:24,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:25,120 INFO L124 PetriNetUnfolderBase]: 338/599 cut-off events. [2024-11-24 01:18:25,120 INFO L125 PetriNetUnfolderBase]: For 76/96 co-relation queries the response was YES. [2024-11-24 01:18:25,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 599 events. 338/599 cut-off events. For 76/96 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2325 event pairs, 81 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1280. Up to 411 conditions per place. [2024-11-24 01:18:25,124 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-11-24 01:18:25,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 206 flow [2024-11-24 01:18:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-24 01:18:25,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-24 01:18:25,126 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 93 flow. Second operand 4 states and 86 transitions. [2024-11-24 01:18:25,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 206 flow [2024-11-24 01:18:25,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:25,128 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 103 flow [2024-11-24 01:18:25,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-24 01:18:25,129 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-24 01:18:25,129 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 103 flow [2024-11-24 01:18:25,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:25,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:25,129 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:25,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 01:18:25,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:25,330 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:25,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1757159, now seen corresponding path program 1 times [2024-11-24 01:18:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801906529] [2024-11-24 01:18:25,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:25,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801906529] [2024-11-24 01:18:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801906529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117063954] [2024-11-24 01:18:25,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:25,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:25,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:25,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:25,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:18:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:25,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:18:25,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:25,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:25,901 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 [2024-11-24 01:18:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:26,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117063954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:26,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:26,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-24 01:18:26,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078049102] [2024-11-24 01:18:26,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:26,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:18:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:26,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:18:26,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:18:26,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:26,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 103 flow. Second operand has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:26,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:26,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:27,196 INFO L124 PetriNetUnfolderBase]: 523/1054 cut-off events. [2024-11-24 01:18:27,196 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-24 01:18:27,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1054 events. 523/1054 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5547 event pairs, 297 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 1181. Up to 485 conditions per place. [2024-11-24 01:18:27,203 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-24 01:18:27,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 85 transitions, 412 flow [2024-11-24 01:18:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:18:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:18:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-11-24 01:18:27,205 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-11-24 01:18:27,206 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 103 flow. Second operand 8 states and 196 transitions. [2024-11-24 01:18:27,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 85 transitions, 412 flow [2024-11-24 01:18:27,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:27,208 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 190 flow [2024-11-24 01:18:27,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=190, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-24 01:18:27,210 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-11-24 01:18:27,210 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 190 flow [2024-11-24 01:18:27,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:27,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:27,211 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:27,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:18:27,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:27,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:27,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash -61822858, now seen corresponding path program 1 times [2024-11-24 01:18:27,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:27,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678372676] [2024-11-24 01:18:27,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:27,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:27,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678372676] [2024-11-24 01:18:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678372676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:27,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139741667] [2024-11-24 01:18:27,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:27,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:27,621 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:27,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:18:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:27,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:18:27,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:27,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:27,866 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 [2024-11-24 01:18:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139741667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:28,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:28,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-24 01:18:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574116578] [2024-11-24 01:18:28,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:28,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:18:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:28,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:18:28,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:18:28,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:18:28,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:28,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:28,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:18:28,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:28,713 INFO L124 PetriNetUnfolderBase]: 744/1306 cut-off events. [2024-11-24 01:18:28,713 INFO L125 PetriNetUnfolderBase]: For 809/849 co-relation queries the response was YES. [2024-11-24 01:18:28,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 1306 events. 744/1306 cut-off events. For 809/849 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6080 event pairs, 375 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1975. Up to 997 conditions per place. [2024-11-24 01:18:28,722 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-11-24 01:18:28,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 425 flow [2024-11-24 01:18:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:18:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:18:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-24 01:18:28,723 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-24 01:18:28,723 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 190 flow. Second operand 7 states and 150 transitions. [2024-11-24 01:18:28,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 425 flow [2024-11-24 01:18:28,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:18:28,728 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 219 flow [2024-11-24 01:18:28,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-11-24 01:18:28,729 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-24 01:18:28,729 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 219 flow [2024-11-24 01:18:28,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:28,729 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:28,729 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:28,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:18:28,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-24 01:18:28,934 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:28,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1073084351, now seen corresponding path program 2 times [2024-11-24 01:18:28,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:28,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043795005] [2024-11-24 01:18:28,935 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:28,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:28,950 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:18:28,950 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:29,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:29,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043795005] [2024-11-24 01:18:29,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043795005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:29,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984578133] [2024-11-24 01:18:29,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:29,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:29,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:18:29,179 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:18:29,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:29,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 01:18:29,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:29,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:29,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984578133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:29,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:29,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 01:18:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217744670] [2024-11-24 01:18:29,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:29,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:18:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:29,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:18:29,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:18:29,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:18:29,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 219 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) [2024-11-24 01:18:29,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:29,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:18:29,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:30,146 INFO L124 PetriNetUnfolderBase]: 560/1084 cut-off events. [2024-11-24 01:18:30,147 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2024-11-24 01:18:30,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1084 events. 560/1084 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5608 event pairs, 321 based on Foata normal form. 0/1020 useless extension candidates. Maximal degree in co-relation 1728. Up to 727 conditions per place. [2024-11-24 01:18:30,154 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 38 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-11-24 01:18:30,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 356 flow [2024-11-24 01:18:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-24 01:18:30,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-24 01:18:30,155 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 219 flow. Second operand 5 states and 108 transitions. [2024-11-24 01:18:30,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 356 flow [2024-11-24 01:18:30,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 339 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 01:18:30,161 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 218 flow [2024-11-24 01:18:30,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2024-11-24 01:18:30,163 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-24 01:18:30,165 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 218 flow [2024-11-24 01:18:30,165 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) [2024-11-24 01:18:30,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:30,165 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:30,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:18:30,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:18:30,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:30,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:30,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1086772558, now seen corresponding path program 2 times [2024-11-24 01:18:30,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:30,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832363151] [2024-11-24 01:18:30,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:30,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:30,395 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:18:30,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:18:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:30,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832363151] [2024-11-24 01:18:30,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832363151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:30,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:30,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:18:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641975256] [2024-11-24 01:18:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:30,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:18:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:30,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:18:30,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:18:30,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:18:30,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:30,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:30,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:18:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:30,954 INFO L124 PetriNetUnfolderBase]: 606/1066 cut-off events. [2024-11-24 01:18:30,955 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2024-11-24 01:18:30,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1066 events. 606/1066 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4734 event pairs, 322 based on Foata normal form. 64/1034 useless extension candidates. Maximal degree in co-relation 1799. Up to 684 conditions per place. [2024-11-24 01:18:30,963 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-11-24 01:18:30,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 357 flow [2024-11-24 01:18:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-24 01:18:30,966 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-24 01:18:30,966 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 218 flow. Second operand 5 states and 92 transitions. [2024-11-24 01:18:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 357 flow [2024-11-24 01:18:30,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:18:30,971 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 202 flow [2024-11-24 01:18:30,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2024-11-24 01:18:30,973 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-11-24 01:18:30,974 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 202 flow [2024-11-24 01:18:30,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:30,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:30,974 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:30,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-24 01:18:30,974 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:30,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1690812900, now seen corresponding path program 1 times [2024-11-24 01:18:30,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:30,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018276745] [2024-11-24 01:18:30,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:30,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018276745] [2024-11-24 01:18:31,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018276745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916496175] [2024-11-24 01:18:31,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:31,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:31,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:31,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:18:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:31,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:18:31,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:31,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:31,644 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 [2024-11-24 01:18:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916496175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:31,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:31,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-24 01:18:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282136201] [2024-11-24 01:18:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:31,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:18:31,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:31,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:18:31,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:18:32,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:18:32,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 202 flow. Second operand has 17 states, 17 states have (on average 14.647058823529411) internal successors, (249), 17 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:32,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:32,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:18:32,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:32,586 INFO L124 PetriNetUnfolderBase]: 583/1027 cut-off events. [2024-11-24 01:18:32,586 INFO L125 PetriNetUnfolderBase]: For 850/850 co-relation queries the response was YES. [2024-11-24 01:18:32,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2801 conditions, 1027 events. 583/1027 cut-off events. For 850/850 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4470 event pairs, 305 based on Foata normal form. 16/979 useless extension candidates. Maximal degree in co-relation 1750. Up to 470 conditions per place. [2024-11-24 01:18:32,593 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-11-24 01:18:32,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 487 flow [2024-11-24 01:18:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:18:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:18:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-11-24 01:18:32,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-11-24 01:18:32,595 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 202 flow. Second operand 8 states and 167 transitions. [2024-11-24 01:18:32,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 487 flow [2024-11-24 01:18:32,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:18:32,599 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 228 flow [2024-11-24 01:18:32,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-11-24 01:18:32,599 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-24 01:18:32,600 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 228 flow [2024-11-24 01:18:32,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.647058823529411) internal successors, (249), 17 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:32,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:32,600 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:32,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:18:32,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 01:18:32,804 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:32,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2050053828, now seen corresponding path program 1 times [2024-11-24 01:18:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769521914] [2024-11-24 01:18:32,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:32,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:32,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769521914] [2024-11-24 01:18:32,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769521914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:32,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:32,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:18:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444473719] [2024-11-24 01:18:32,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:32,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:18:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:32,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:18:32,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:18:32,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:32,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:33,037 INFO L124 PetriNetUnfolderBase]: 560/1000 cut-off events. [2024-11-24 01:18:33,038 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-24 01:18:33,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 1000 events. 560/1000 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4393 event pairs, 159 based on Foata normal form. 2/1002 useless extension candidates. Maximal degree in co-relation 1731. Up to 796 conditions per place. [2024-11-24 01:18:33,044 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 44 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-11-24 01:18:33,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 369 flow [2024-11-24 01:18:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:18:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:18:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-24 01:18:33,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 01:18:33,046 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 228 flow. Second operand 3 states and 84 transitions. [2024-11-24 01:18:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 369 flow [2024-11-24 01:18:33,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-24 01:18:33,050 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 245 flow [2024-11-24 01:18:33,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-24 01:18:33,051 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-24 01:18:33,052 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 245 flow [2024-11-24 01:18:33,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:33,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:33,052 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:33,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-24 01:18:33,053 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:33,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash 748437236, now seen corresponding path program 2 times [2024-11-24 01:18:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:33,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947141786] [2024-11-24 01:18:33,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:33,072 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:18:33,072 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:33,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947141786] [2024-11-24 01:18:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947141786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013904015] [2024-11-24 01:18:33,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:33,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:33,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:33,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:18:33,370 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:18:33,371 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:33,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 01:18:33,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:33,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:33,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:18:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013904015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:33,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 01:18:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558571229] [2024-11-24 01:18:33,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:33,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:18:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:33,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:18:33,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:18:34,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:18:34,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 245 flow. Second operand has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:34,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:34,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:18:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:34,359 INFO L124 PetriNetUnfolderBase]: 560/984 cut-off events. [2024-11-24 01:18:34,359 INFO L125 PetriNetUnfolderBase]: For 1064/1064 co-relation queries the response was YES. [2024-11-24 01:18:34,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 984 events. 560/984 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4265 event pairs, 196 based on Foata normal form. 16/1000 useless extension candidates. Maximal degree in co-relation 1749. Up to 523 conditions per place. [2024-11-24 01:18:34,367 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 43 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-11-24 01:18:34,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 414 flow [2024-11-24 01:18:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-24 01:18:34,368 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-11-24 01:18:34,368 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 245 flow. Second operand 5 states and 89 transitions. [2024-11-24 01:18:34,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 414 flow [2024-11-24 01:18:34,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 405 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 01:18:34,375 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 248 flow [2024-11-24 01:18:34,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2024-11-24 01:18:34,375 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-24 01:18:34,375 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 248 flow [2024-11-24 01:18:34,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.09090909090909) internal successors, (177), 11 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:34,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:34,376 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:34,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:18:34,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:34,577 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:34,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash -964855040, now seen corresponding path program 1 times [2024-11-24 01:18:34,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:34,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433676756] [2024-11-24 01:18:34,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:34,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:34,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433676756] [2024-11-24 01:18:34,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433676756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:34,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:34,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:18:34,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688410835] [2024-11-24 01:18:34,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:34,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:18:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:34,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:18:34,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:18:34,771 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:34,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:34,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:34,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:34,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:35,109 INFO L124 PetriNetUnfolderBase]: 697/1248 cut-off events. [2024-11-24 01:18:35,110 INFO L125 PetriNetUnfolderBase]: For 1603/1603 co-relation queries the response was YES. [2024-11-24 01:18:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3754 conditions, 1248 events. 697/1248 cut-off events. For 1603/1603 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6318 event pairs, 219 based on Foata normal form. 52/1300 useless extension candidates. Maximal degree in co-relation 2238. Up to 572 conditions per place. [2024-11-24 01:18:35,118 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 79 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-24 01:18:35,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 721 flow [2024-11-24 01:18:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:18:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:18:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-24 01:18:35,121 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-11-24 01:18:35,121 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 248 flow. Second operand 6 states and 162 transitions. [2024-11-24 01:18:35,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 721 flow [2024-11-24 01:18:35,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 681 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:18:35,129 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 368 flow [2024-11-24 01:18:35,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2024-11-24 01:18:35,130 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-11-24 01:18:35,131 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 368 flow [2024-11-24 01:18:35,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:35,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:35,131 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:35,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 01:18:35,131 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:35,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 188723548, now seen corresponding path program 2 times [2024-11-24 01:18:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805359254] [2024-11-24 01:18:35,132 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:35,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:35,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805359254] [2024-11-24 01:18:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805359254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:35,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:18:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583476644] [2024-11-24 01:18:35,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:35,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:35,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:35,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:35,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 368 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:35,473 INFO L124 PetriNetUnfolderBase]: 737/1316 cut-off events. [2024-11-24 01:18:35,473 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2024-11-24 01:18:35,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4658 conditions, 1316 events. 737/1316 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6385 event pairs, 212 based on Foata normal form. 14/1330 useless extension candidates. Maximal degree in co-relation 2903. Up to 1057 conditions per place. [2024-11-24 01:18:35,483 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 59 selfloop transitions, 9 changer transitions 1/70 dead transitions. [2024-11-24 01:18:35,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 609 flow [2024-11-24 01:18:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-24 01:18:35,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-24 01:18:35,485 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 368 flow. Second operand 4 states and 105 transitions. [2024-11-24 01:18:35,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 609 flow [2024-11-24 01:18:35,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 588 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:35,494 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 430 flow [2024-11-24 01:18:35,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-24 01:18:35,496 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-24 01:18:35,497 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 430 flow [2024-11-24 01:18:35,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:35,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:35,497 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:35,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-24 01:18:35,498 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:35,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash 153578844, now seen corresponding path program 3 times [2024-11-24 01:18:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:35,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301080226] [2024-11-24 01:18:35,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:18:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:35,524 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:18:35,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:35,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:35,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301080226] [2024-11-24 01:18:35,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301080226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:35,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:35,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:18:35,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929688482] [2024-11-24 01:18:35,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:35,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:35,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:35,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:35,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:35,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:35,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:35,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:35,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:35,863 INFO L124 PetriNetUnfolderBase]: 729/1308 cut-off events. [2024-11-24 01:18:35,863 INFO L125 PetriNetUnfolderBase]: For 3144/3144 co-relation queries the response was YES. [2024-11-24 01:18:35,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 1308 events. 729/1308 cut-off events. For 3144/3144 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6422 event pairs, 330 based on Foata normal form. 8/1316 useless extension candidates. Maximal degree in co-relation 3088. Up to 935 conditions per place. [2024-11-24 01:18:35,872 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 65 selfloop transitions, 11 changer transitions 1/78 dead transitions. [2024-11-24 01:18:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 739 flow [2024-11-24 01:18:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-24 01:18:35,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-24 01:18:35,874 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 430 flow. Second operand 4 states and 103 transitions. [2024-11-24 01:18:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 739 flow [2024-11-24 01:18:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 729 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-24 01:18:35,883 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 470 flow [2024-11-24 01:18:35,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=470, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-11-24 01:18:35,884 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-11-24 01:18:35,884 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 470 flow [2024-11-24 01:18:35,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:35,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:35,885 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:35,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 01:18:35,885 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:35,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash 147413604, now seen corresponding path program 4 times [2024-11-24 01:18:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:35,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265820869] [2024-11-24 01:18:35,887 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:18:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:35,901 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:18:35,902 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:36,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265820869] [2024-11-24 01:18:36,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265820869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816151976] [2024-11-24 01:18:36,065 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:18:36,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:36,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:36,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:18:36,148 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:18:36,148 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:36,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:18:36,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:36,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816151976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:36,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-11-24 01:18:36,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109492989] [2024-11-24 01:18:36,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:36,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:18:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:36,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:18:36,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:18:36,281 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:36,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:36,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:36,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:36,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:36,922 INFO L124 PetriNetUnfolderBase]: 1005/1790 cut-off events. [2024-11-24 01:18:36,922 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-11-24 01:18:36,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 1790 events. 1005/1790 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9766 event pairs, 166 based on Foata normal form. 40/1830 useless extension candidates. Maximal degree in co-relation 5295. Up to 526 conditions per place. [2024-11-24 01:18:36,939 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 92 selfloop transitions, 70 changer transitions 3/166 dead transitions. [2024-11-24 01:18:36,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 166 transitions, 1544 flow [2024-11-24 01:18:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:18:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:18:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 317 transitions. [2024-11-24 01:18:36,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6096153846153847 [2024-11-24 01:18:36,941 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 470 flow. Second operand 13 states and 317 transitions. [2024-11-24 01:18:36,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 166 transitions, 1544 flow [2024-11-24 01:18:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 166 transitions, 1498 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:36,959 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 1169 flow [2024-11-24 01:18:36,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1169, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-11-24 01:18:36,961 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-11-24 01:18:36,961 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 1169 flow [2024-11-24 01:18:36,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:36,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:36,961 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:36,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:18:37,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:18:37,162 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:37,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash -117938616, now seen corresponding path program 5 times [2024-11-24 01:18:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043288518] [2024-11-24 01:18:37,163 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:18:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:37,176 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:37,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:37,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:37,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043288518] [2024-11-24 01:18:37,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043288518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:37,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:37,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:18:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060120023] [2024-11-24 01:18:37,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:37,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:18:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:37,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:18:37,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:18:37,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:37,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 1169 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:37,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:37,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:37,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:37,608 INFO L124 PetriNetUnfolderBase]: 999/1780 cut-off events. [2024-11-24 01:18:37,608 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2024-11-24 01:18:37,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 1780 events. 999/1780 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9582 event pairs, 346 based on Foata normal form. 4/1784 useless extension candidates. Maximal degree in co-relation 7853. Up to 1089 conditions per place. [2024-11-24 01:18:37,632 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 97 selfloop transitions, 31 changer transitions 2/131 dead transitions. [2024-11-24 01:18:37,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 1692 flow [2024-11-24 01:18:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-24 01:18:37,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-24 01:18:37,635 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 1169 flow. Second operand 5 states and 128 transitions. [2024-11-24 01:18:37,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 1692 flow [2024-11-24 01:18:37,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1630 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-11-24 01:18:37,678 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1287 flow [2024-11-24 01:18:37,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1287, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-11-24 01:18:37,679 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-11-24 01:18:37,679 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1287 flow [2024-11-24 01:18:37,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:37,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:37,680 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:37,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-24 01:18:37,680 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:37,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 506493428, now seen corresponding path program 6 times [2024-11-24 01:18:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128328960] [2024-11-24 01:18:37,682 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:18:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:37,704 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:18:37,704 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:37,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128328960] [2024-11-24 01:18:37,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128328960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:37,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:37,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:18:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336020921] [2024-11-24 01:18:37,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:37,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:37,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:37,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:37,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:37,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1287 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:37,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:37,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:38,123 INFO L124 PetriNetUnfolderBase]: 997/1768 cut-off events. [2024-11-24 01:18:38,124 INFO L125 PetriNetUnfolderBase]: For 12338/12338 co-relation queries the response was YES. [2024-11-24 01:18:38,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9411 conditions, 1768 events. 997/1768 cut-off events. For 12338/12338 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9421 event pairs, 355 based on Foata normal form. 14/1782 useless extension candidates. Maximal degree in co-relation 8053. Up to 1089 conditions per place. [2024-11-24 01:18:38,140 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 88 selfloop transitions, 37 changer transitions 2/128 dead transitions. [2024-11-24 01:18:38,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1708 flow [2024-11-24 01:18:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-24 01:18:38,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-24 01:18:38,143 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1287 flow. Second operand 4 states and 104 transitions. [2024-11-24 01:18:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1708 flow [2024-11-24 01:18:38,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 1676 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-24 01:18:38,186 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 1374 flow [2024-11-24 01:18:38,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1374, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-11-24 01:18:38,187 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-11-24 01:18:38,187 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 1374 flow [2024-11-24 01:18:38,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:38,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:38,188 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:38,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-24 01:18:38,188 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:38,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash 350512329, now seen corresponding path program 1 times [2024-11-24 01:18:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:38,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393589933] [2024-11-24 01:18:38,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:38,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:38,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393589933] [2024-11-24 01:18:38,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393589933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:38,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:38,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-24 01:18:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813818497] [2024-11-24 01:18:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:38,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:18:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:38,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:18:38,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:18:38,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:38,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:38,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:38,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:38,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:39,214 INFO L124 PetriNetUnfolderBase]: 1057/1863 cut-off events. [2024-11-24 01:18:39,215 INFO L125 PetriNetUnfolderBase]: For 13371/13371 co-relation queries the response was YES. [2024-11-24 01:18:39,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 1863 events. 1057/1863 cut-off events. For 13371/13371 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9758 event pairs, 215 based on Foata normal form. 8/1871 useless extension candidates. Maximal degree in co-relation 9012. Up to 658 conditions per place. [2024-11-24 01:18:39,233 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 67 changer transitions 0/177 dead transitions. [2024-11-24 01:18:39,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 177 transitions, 2347 flow [2024-11-24 01:18:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:18:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:18:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-11-24 01:18:39,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-24 01:18:39,235 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 1374 flow. Second operand 10 states and 232 transitions. [2024-11-24 01:18:39,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 177 transitions, 2347 flow [2024-11-24 01:18:39,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 177 transitions, 2260 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-24 01:18:39,276 INFO L231 Difference]: Finished difference. Result has 108 places, 129 transitions, 1734 flow [2024-11-24 01:18:39,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1734, PETRI_PLACES=108, PETRI_TRANSITIONS=129} [2024-11-24 01:18:39,277 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-11-24 01:18:39,277 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 129 transitions, 1734 flow [2024-11-24 01:18:39,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:39,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:39,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:39,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-24 01:18:39,278 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:39,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1745961605, now seen corresponding path program 2 times [2024-11-24 01:18:39,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:39,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162551376] [2024-11-24 01:18:39,279 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:39,306 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:39,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:39,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162551376] [2024-11-24 01:18:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162551376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319532694] [2024-11-24 01:18:39,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:39,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:39,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:39,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:18:39,495 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:39,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:39,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:18:39,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:39,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319532694] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:18:39,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-24 01:18:39,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106409681] [2024-11-24 01:18:39,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:39,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:39,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:39,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:18:39,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 129 transitions, 1734 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:39,896 INFO L124 PetriNetUnfolderBase]: 1045/1833 cut-off events. [2024-11-24 01:18:39,896 INFO L125 PetriNetUnfolderBase]: For 16019/16019 co-relation queries the response was YES. [2024-11-24 01:18:39,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10944 conditions, 1833 events. 1045/1833 cut-off events. For 16019/16019 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9609 event pairs, 103 based on Foata normal form. 24/1857 useless extension candidates. Maximal degree in co-relation 9738. Up to 1066 conditions per place. [2024-11-24 01:18:39,912 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 122 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-11-24 01:18:39,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 174 transitions, 2591 flow [2024-11-24 01:18:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:18:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:18:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-11-24 01:18:39,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-11-24 01:18:39,914 INFO L175 Difference]: Start difference. First operand has 108 places, 129 transitions, 1734 flow. Second operand 4 states and 107 transitions. [2024-11-24 01:18:39,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 174 transitions, 2591 flow [2024-11-24 01:18:39,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 2474 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-24 01:18:39,991 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1874 flow [2024-11-24 01:18:39,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1874, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2024-11-24 01:18:39,992 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-11-24 01:18:39,992 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1874 flow [2024-11-24 01:18:39,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:39,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:39,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:40,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-24 01:18:40,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:40,194 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:40,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -337724647, now seen corresponding path program 3 times [2024-11-24 01:18:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503244444] [2024-11-24 01:18:40,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:18:40,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:40,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:18:40,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503244444] [2024-11-24 01:18:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503244444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:40,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:40,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:18:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370110940] [2024-11-24 01:18:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:40,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:18:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:40,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:18:40,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:18:40,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:40,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1874 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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) [2024-11-24 01:18:40,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:40,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:40,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:40,781 INFO L124 PetriNetUnfolderBase]: 983/1699 cut-off events. [2024-11-24 01:18:40,782 INFO L125 PetriNetUnfolderBase]: For 19164/19164 co-relation queries the response was YES. [2024-11-24 01:18:40,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10959 conditions, 1699 events. 983/1699 cut-off events. For 19164/19164 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8488 event pairs, 326 based on Foata normal form. 18/1717 useless extension candidates. Maximal degree in co-relation 10071. Up to 1162 conditions per place. [2024-11-24 01:18:40,800 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 111 selfloop transitions, 31 changer transitions 8/151 dead transitions. [2024-11-24 01:18:40,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 2308 flow [2024-11-24 01:18:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:18:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:18:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-24 01:18:40,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-24 01:18:40,802 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1874 flow. Second operand 5 states and 124 transitions. [2024-11-24 01:18:40,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 2308 flow [2024-11-24 01:18:40,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 151 transitions, 2243 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-24 01:18:40,864 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 1917 flow [2024-11-24 01:18:40,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1917, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-11-24 01:18:40,865 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-11-24 01:18:40,865 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 1917 flow [2024-11-24 01:18:40,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 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) [2024-11-24 01:18:40,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:40,866 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:40,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-24 01:18:40,866 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:40,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 522640693, now seen corresponding path program 1 times [2024-11-24 01:18:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444949427] [2024-11-24 01:18:40,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:41,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444949427] [2024-11-24 01:18:41,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444949427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:41,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470812855] [2024-11-24 01:18:41,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:41,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:41,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:41,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:18:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:41,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 01:18:41,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:41,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:42,114 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-24 01:18:42,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 31 [2024-11-24 01:18:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470812855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:42,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:42,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-24 01:18:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954445439] [2024-11-24 01:18:42,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:42,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:18:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:42,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:18:42,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:18:43,268 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:43,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 1917 flow. Second operand has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:43,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:43,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:43,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:45,930 INFO L124 PetriNetUnfolderBase]: 1605/2783 cut-off events. [2024-11-24 01:18:45,930 INFO L125 PetriNetUnfolderBase]: For 26286/26286 co-relation queries the response was YES. [2024-11-24 01:18:45,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2783 events. 1605/2783 cut-off events. For 26286/26286 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14638 event pairs, 110 based on Foata normal form. 9/2792 useless extension candidates. Maximal degree in co-relation 16020. Up to 627 conditions per place. [2024-11-24 01:18:45,944 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 173 selfloop transitions, 96 changer transitions 225/495 dead transitions. [2024-11-24 01:18:45,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 495 transitions, 6236 flow [2024-11-24 01:18:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 01:18:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-24 01:18:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1064 transitions. [2024-11-24 01:18:45,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2024-11-24 01:18:45,949 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 1917 flow. Second operand 47 states and 1064 transitions. [2024-11-24 01:18:45,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 495 transitions, 6236 flow [2024-11-24 01:18:46,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 495 transitions, 6090 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-24 01:18:46,024 INFO L231 Difference]: Finished difference. Result has 175 places, 155 transitions, 2222 flow [2024-11-24 01:18:46,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2222, PETRI_PLACES=175, PETRI_TRANSITIONS=155} [2024-11-24 01:18:46,025 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-11-24 01:18:46,025 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 155 transitions, 2222 flow [2024-11-24 01:18:46,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:46,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:46,025 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:46,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:18:46,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-24 01:18:46,230 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:46,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -993244505, now seen corresponding path program 2 times [2024-11-24 01:18:46,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:46,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052912550] [2024-11-24 01:18:46,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:46,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:46,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:46,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:18:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052912550] [2024-11-24 01:18:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052912550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074650814] [2024-11-24 01:18:46,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:46,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:46,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:46,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:18:46,663 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:46,663 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:46,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:18:46,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:18:46,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:18:46,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074650814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:46,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:46,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-24 01:18:46,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823403974] [2024-11-24 01:18:46,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:46,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:18:46,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:46,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:18:46,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:18:46,818 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:46,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 155 transitions, 2222 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:46,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:46,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:46,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:47,652 INFO L124 PetriNetUnfolderBase]: 1133/1930 cut-off events. [2024-11-24 01:18:47,652 INFO L125 PetriNetUnfolderBase]: For 30471/30471 co-relation queries the response was YES. [2024-11-24 01:18:47,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 1930 events. 1133/1930 cut-off events. For 30471/30471 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8944 event pairs, 178 based on Foata normal form. 162/2092 useless extension candidates. Maximal degree in co-relation 13852. Up to 609 conditions per place. [2024-11-24 01:18:47,664 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 218 selfloop transitions, 94 changer transitions 0/313 dead transitions. [2024-11-24 01:18:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 313 transitions, 4784 flow [2024-11-24 01:18:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:18:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 01:18:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 377 transitions. [2024-11-24 01:18:47,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6283333333333333 [2024-11-24 01:18:47,666 INFO L175 Difference]: Start difference. First operand has 175 places, 155 transitions, 2222 flow. Second operand 15 states and 377 transitions. [2024-11-24 01:18:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 313 transitions, 4784 flow [2024-11-24 01:18:47,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 313 transitions, 4239 flow, removed 239 selfloop flow, removed 28 redundant places. [2024-11-24 01:18:47,734 INFO L231 Difference]: Finished difference. Result has 134 places, 180 transitions, 2683 flow [2024-11-24 01:18:47,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2683, PETRI_PLACES=134, PETRI_TRANSITIONS=180} [2024-11-24 01:18:47,735 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-11-24 01:18:47,735 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 180 transitions, 2683 flow [2024-11-24 01:18:47,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:47,736 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:47,736 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:47,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:18:47,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:47,936 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:47,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1127465353, now seen corresponding path program 3 times [2024-11-24 01:18:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611085010] [2024-11-24 01:18:47,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:18:47,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:48,009 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 01:18:48,009 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:50,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611085010] [2024-11-24 01:18:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611085010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522991353] [2024-11-24 01:18:50,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:18:50,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:50,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:50,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:50,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:18:50,280 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 01:18:50,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:50,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-24 01:18:50,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:50,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:18:50,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2024-11-24 01:18:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:50,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:51,657 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-11-24 01:18:51,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-11-24 01:18:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:18:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522991353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:52,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2024-11-24 01:18:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917101255] [2024-11-24 01:18:52,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:52,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 01:18:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:52,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 01:18:52,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 01:18:54,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:18:54,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 180 transitions, 2683 flow. Second operand has 33 states, 33 states have (on average 18.363636363636363) internal successors, (606), 33 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:54,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:54,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:18:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:56,492 INFO L124 PetriNetUnfolderBase]: 2233/3825 cut-off events. [2024-11-24 01:18:56,492 INFO L125 PetriNetUnfolderBase]: For 47641/47641 co-relation queries the response was YES. [2024-11-24 01:18:56,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26783 conditions, 3825 events. 2233/3825 cut-off events. For 47641/47641 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 20565 event pairs, 161 based on Foata normal form. 3/3828 useless extension candidates. Maximal degree in co-relation 26733. Up to 1252 conditions per place. [2024-11-24 01:18:56,525 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 227 changer transitions 13/522 dead transitions. [2024-11-24 01:18:56,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 522 transitions, 8033 flow [2024-11-24 01:18:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 01:18:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-24 01:18:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 716 transitions. [2024-11-24 01:18:56,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-11-24 01:18:56,528 INFO L175 Difference]: Start difference. First operand has 134 places, 180 transitions, 2683 flow. Second operand 30 states and 716 transitions. [2024-11-24 01:18:56,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 522 transitions, 8033 flow [2024-11-24 01:18:56,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 522 transitions, 7811 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-11-24 01:18:56,637 INFO L231 Difference]: Finished difference. Result has 165 places, 334 transitions, 5292 flow [2024-11-24 01:18:56,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5292, PETRI_PLACES=165, PETRI_TRANSITIONS=334} [2024-11-24 01:18:56,638 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-11-24 01:18:56,638 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 334 transitions, 5292 flow [2024-11-24 01:18:56,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 18.363636363636363) internal successors, (606), 33 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:56,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:56,639 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:56,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 01:18:56,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-24 01:18:56,841 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:18:56,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:56,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1148158495, now seen corresponding path program 4 times [2024-11-24 01:18:56,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:56,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203542408] [2024-11-24 01:18:56,842 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:18:56,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:56,909 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:18:56,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:18:58,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:58,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203542408] [2024-11-24 01:18:58,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203542408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:58,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432266047] [2024-11-24 01:18:58,690 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:18:58,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:58,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:58,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:18:58,798 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:18:58,799 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:58,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 01:18:58,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:59,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:18:59,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2024-11-24 01:18:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:18:59,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:19:00,080 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-11-24 01:19:00,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-11-24 01:19:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:19:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432266047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:19:00,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:19:00,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2024-11-24 01:19:00,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363669679] [2024-11-24 01:19:00,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:19:00,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-24 01:19:00,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:19:00,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-24 01:19:00,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:19:02,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:19:02,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 334 transitions, 5292 flow. Second operand has 31 states, 31 states have (on average 18.580645161290324) internal successors, (576), 31 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:02,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:19:02,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:19:02,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:19:06,663 INFO L124 PetriNetUnfolderBase]: 6441/11217 cut-off events. [2024-11-24 01:19:06,664 INFO L125 PetriNetUnfolderBase]: For 150771/150771 co-relation queries the response was YES. [2024-11-24 01:19:06,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80126 conditions, 11217 events. 6441/11217 cut-off events. For 150771/150771 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 74807 event pairs, 413 based on Foata normal form. 2/11219 useless extension candidates. Maximal degree in co-relation 80070. Up to 2862 conditions per place. [2024-11-24 01:19:06,762 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 426 selfloop transitions, 620 changer transitions 8/1055 dead transitions. [2024-11-24 01:19:06,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 1055 transitions, 16931 flow [2024-11-24 01:19:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 01:19:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-24 01:19:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 894 transitions. [2024-11-24 01:19:06,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6385714285714286 [2024-11-24 01:19:06,765 INFO L175 Difference]: Start difference. First operand has 165 places, 334 transitions, 5292 flow. Second operand 35 states and 894 transitions. [2024-11-24 01:19:06,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 1055 transitions, 16931 flow [2024-11-24 01:19:07,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1055 transitions, 15733 flow, removed 596 selfloop flow, removed 3 redundant places. [2024-11-24 01:19:07,158 INFO L231 Difference]: Finished difference. Result has 204 places, 796 transitions, 12548 flow [2024-11-24 01:19:07,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12548, PETRI_PLACES=204, PETRI_TRANSITIONS=796} [2024-11-24 01:19:07,159 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-11-24 01:19:07,159 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 796 transitions, 12548 flow [2024-11-24 01:19:07,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 18.580645161290324) internal successors, (576), 31 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:07,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:19:07,160 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:19:07,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 01:19:07,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-24 01:19:07,360 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:19:07,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:19:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash -141903973, now seen corresponding path program 5 times [2024-11-24 01:19:07,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:19:07,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423177756] [2024-11-24 01:19:07,361 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:19:07,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:19:07,408 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 01:19:07,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:19:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:19:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423177756] [2024-11-24 01:19:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423177756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:19:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122490351] [2024-11-24 01:19:10,570 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:19:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:19:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:19:10,571 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:19:10,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:19:10,689 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 01:19:10,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:10,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-24 01:19:10,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:19:10,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:19:11,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:19:11,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 76 [2024-11-24 01:19:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:19:11,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:19:12,832 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 320 treesize of output 280 [2024-11-24 01:19:15,127 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-24 01:19:15,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 4677 treesize of output 2908 [2024-11-24 01:26:05,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-11-24 01:26:05,199 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-24 01:26:05,200 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-24 01:26:05,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:26:05,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 01:26:05,401 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-24 01:26:05,408 INFO L158 Benchmark]: Toolchain (without parser) took 467592.30ms. Allocated memory was 117.4MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 94.7MB in the beginning and 828.7MB in the end (delta: -734.0MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-24 01:26:05,408 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:26:05,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 343.70ms. Allocated memory is still 117.4MB. Free memory was 94.5MB in the beginning and 82.5MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 01:26:05,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.17ms. Allocated memory is still 117.4MB. Free memory was 82.5MB in the beginning and 81.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 01:26:05,409 INFO L158 Benchmark]: Boogie Preprocessor took 73.38ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 78.8MB in the end (delta: 2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 01:26:05,409 INFO L158 Benchmark]: RCFGBuilder took 844.51ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 85.6MB in the end (delta: -6.7MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2024-11-24 01:26:05,410 INFO L158 Benchmark]: TraceAbstraction took 466268.88ms. Allocated memory was 117.4MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 85.0MB in the beginning and 828.7MB in the end (delta: -743.8MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-24 01:26:05,411 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 142.6MB. Free memory is still 78.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 343.70ms. Allocated memory is still 117.4MB. Free memory was 94.5MB in the beginning and 82.5MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.17ms. Allocated memory is still 117.4MB. Free memory was 82.5MB in the beginning and 81.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 73.38ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 78.8MB in the end (delta: 2.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 844.51ms. Allocated memory is still 117.4MB. Free memory was 78.8MB in the beginning and 85.6MB in the end (delta: -6.7MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * TraceAbstraction took 466268.88ms. Allocated memory was 117.4MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 85.0MB in the beginning and 828.7MB in the end (delta: -743.8MB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:26:07,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:26:07,940 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-24 01:26:07,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:26:07,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:26:07,988 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:26:07,989 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:26:07,989 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:26:07,990 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:26:07,990 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:26:07,991 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:26:07,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:26:07,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:26:07,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:26:07,992 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:26:07,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:26:07,992 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 01:26:07,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:26:07,994 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:26:07,995 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:26:07,995 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:26:07,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:26:07,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:26:07,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:26:07,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:26:07,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:26:07,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:26:07,997 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-24 01:26:07,998 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-24 01:26:07,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:26:07,998 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:26:07,998 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:26:07,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:26:07,998 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_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-24 01:26:08,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:26:08,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:26:08,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:26:08,310 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:26:08,311 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:26:08,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-24 01:26:11,243 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/c211fa0bd/7639e09b0dd34c0298e4fbee2c93fab2/FLAG2087fb4fd [2024-11-24 01:26:11,463 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:26:11,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-24 01:26:11,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/c211fa0bd/7639e09b0dd34c0298e4fbee2c93fab2/FLAG2087fb4fd [2024-11-24 01:26:11,486 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/data/c211fa0bd/7639e09b0dd34c0298e4fbee2c93fab2 [2024-11-24 01:26:11,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:26:11,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:26:11,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:26:11,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:26:11,495 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:26:11,495 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601233aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11, skipping insertion in model container [2024-11-24 01:26:11,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:26:11,749 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:26:11,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:26:11,781 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:26:11,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:26:11,844 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:26:11,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11 WrapperNode [2024-11-24 01:26:11,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:26:11,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:26:11,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:26:11,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:26:11,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,900 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 144 [2024-11-24 01:26:11,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:26:11,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:26:11,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:26:11,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:26:11,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,924 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,947 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-11-24 01:26:11,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,962 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,963 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,970 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:26:11,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:26:11,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:26:11,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:26:11,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (1/1) ... [2024-11-24 01:26:11,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:26:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:12,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:26:12,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:26:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:26:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:26:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:26:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:26:12,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:26:12,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-24 01:26:12,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-24 01:26:12,062 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:26:12,177 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:26:12,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:26:12,624 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:26:12,624 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:26:13,000 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:26:13,000 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-24 01:26:13,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:26:13 BoogieIcfgContainer [2024-11-24 01:26:13,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:26:13,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:26:13,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:26:13,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:26:13,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:26:11" (1/3) ... [2024-11-24 01:26:13,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fb8821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:26:13, skipping insertion in model container [2024-11-24 01:26:13,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:26:11" (2/3) ... [2024-11-24 01:26:13,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fb8821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:26:13, skipping insertion in model container [2024-11-24 01:26:13,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:26:13" (3/3) ... [2024-11-24 01:26:13,024 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-24 01:26:13,036 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:26:13,037 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-4.wvr.c that has 3 procedures, 38 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-24 01:26:13,038 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:26:13,126 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:26:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-11-24 01:26:13,206 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-11-24 01:26:13,209 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:26:13,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-24 01:26:13,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-11-24 01:26:13,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-11-24 01:26:13,228 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:26:13,245 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;@730b614c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:26:13,247 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-24 01:26:13,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:26:13,254 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 01:26:13,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 01:26:13,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:13,254 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:26:13,255 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:13,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 511308, now seen corresponding path program 1 times [2024-11-24 01:26:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355161541] [2024-11-24 01:26:13,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:13,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:13,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:13,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:26:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:13,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:13,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:13,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-24 01:26:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:13,465 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:13,466 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:13,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355161541] [2024-11-24 01:26:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355161541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:13,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:26:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814090444] [2024-11-24 01:26:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:13,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:26:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:13,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:26:13,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:26:13,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:13,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:13,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:13,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:13,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:13,758 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-11-24 01:26:13,759 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-24 01:26:13,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1137 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-11-24 01:26:13,765 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-24 01:26:13,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-11-24 01:26:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:26:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:26:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-24 01:26:13,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-24 01:26:13,781 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-11-24 01:26:13,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-11-24 01:26:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:13,791 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-11-24 01:26:13,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-24 01:26:13,802 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-24 01:26:13,802 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-11-24 01:26:13,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:13,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:13,803 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:26:13,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:14,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:14,007 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:14,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash 511309, now seen corresponding path program 1 times [2024-11-24 01:26:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:14,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936435786] [2024-11-24 01:26:14,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:14,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:14,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:14,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:26:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:14,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:26:14,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:14,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:14,220 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:14,220 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:14,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936435786] [2024-11-24 01:26:14,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936435786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:14,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:26:14,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952280374] [2024-11-24 01:26:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:14,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:26:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:14,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:26:14,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:26:14,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:14,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:14,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:14,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:14,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:14,481 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-11-24 01:26:14,482 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:26:14,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1144 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-24 01:26:14,484 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-24 01:26:14,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-11-24 01:26:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:26:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:26:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-24 01:26:14,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-24 01:26:14,487 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-11-24 01:26:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-11-24 01:26:14,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:26:14,488 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-11-24 01:26:14,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-24 01:26:14,489 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-24 01:26:14,489 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-11-24 01:26:14,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:14,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:14,492 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 01:26:14,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:14,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:14,693 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:14,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash 491384343, now seen corresponding path program 1 times [2024-11-24 01:26:14,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461691723] [2024-11-24 01:26:14,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:14,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:14,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:14,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:26:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:14,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:26:14,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:14,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:14,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:15,206 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:15,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461691723] [2024-11-24 01:26:15,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461691723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:15,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:15,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-24 01:26:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981247833] [2024-11-24 01:26:15,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:15,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:26:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:15,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:26:15,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:26:15,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:15,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:15,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:15,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:15,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:16,259 INFO L124 PetriNetUnfolderBase]: 104/264 cut-off events. [2024-11-24 01:26:16,260 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:26:16,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 264 events. 104/264 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1180 event pairs, 75 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 461. Up to 182 conditions per place. [2024-11-24 01:26:16,262 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2024-11-24 01:26:16,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 186 flow [2024-11-24 01:26:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:26:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:26:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-11-24 01:26:16,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-11-24 01:26:16,265 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 9 states and 173 transitions. [2024-11-24 01:26:16,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 186 flow [2024-11-24 01:26:16,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:26:16,267 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 158 flow [2024-11-24 01:26:16,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=158, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-24 01:26:16,268 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-11-24 01:26:16,268 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 158 flow [2024-11-24 01:26:16,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:16,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:16,268 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:16,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 01:26:16,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:16,473 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:16,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1585284451, now seen corresponding path program 1 times [2024-11-24 01:26:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:16,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853424585] [2024-11-24 01:26:16,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:16,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:16,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:26:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:16,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:26:16,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:16,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:16,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:17,365 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:17,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853424585] [2024-11-24 01:26:17,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853424585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:17,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:17,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-24 01:26:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580067805] [2024-11-24 01:26:17,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:17,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:26:17,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:17,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:26:17,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:26:18,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-24 01:26:18,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 158 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:18,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:18,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-24 01:26:18,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:19,095 INFO L124 PetriNetUnfolderBase]: 325/751 cut-off events. [2024-11-24 01:26:19,096 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-24 01:26:19,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1380 conditions, 751 events. 325/751 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4328 event pairs, 156 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 1250. Up to 248 conditions per place. [2024-11-24 01:26:19,105 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-24 01:26:19,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 380 flow [2024-11-24 01:26:19,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:26:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:26:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-24 01:26:19,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-24 01:26:19,112 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 158 flow. Second operand 8 states and 184 transitions. [2024-11-24 01:26:19,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 380 flow [2024-11-24 01:26:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 366 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-24 01:26:19,117 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 183 flow [2024-11-24 01:26:19,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-11-24 01:26:19,119 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-24 01:26:19,120 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 183 flow [2024-11-24 01:26:19,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:19,121 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:19,121 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:19,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:26:19,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:19,321 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:19,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1585284450, now seen corresponding path program 1 times [2024-11-24 01:26:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:19,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230228054] [2024-11-24 01:26:19,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:19,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:19,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:19,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:26:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:19,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 01:26:19,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:19,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-24 01:26:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:19,429 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:19,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:19,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230228054] [2024-11-24 01:26:19,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230228054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:19,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:19,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:26:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565516412] [2024-11-24 01:26:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:19,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:19,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:19,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:19,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-24 01:26:19,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:19,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:19,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-24 01:26:19,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:19,685 INFO L124 PetriNetUnfolderBase]: 302/646 cut-off events. [2024-11-24 01:26:19,685 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-24 01:26:19,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 646 events. 302/646 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3302 event pairs, 225 based on Foata normal form. 48/619 useless extension candidates. Maximal degree in co-relation 1206. Up to 523 conditions per place. [2024-11-24 01:26:19,691 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 30 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2024-11-24 01:26:19,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 243 flow [2024-11-24 01:26:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-24 01:26:19,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-24 01:26:19,694 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 183 flow. Second operand 4 states and 67 transitions. [2024-11-24 01:26:19,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 243 flow [2024-11-24 01:26:19,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:26:19,697 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 175 flow [2024-11-24 01:26:19,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-24 01:26:19,698 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-11-24 01:26:19,698 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 175 flow [2024-11-24 01:26:19,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:19,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:19,698 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:19,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:26:19,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:19,899 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:19,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1255253233, now seen corresponding path program 1 times [2024-11-24 01:26:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:19,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562526357] [2024-11-24 01:26:19,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:19,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:19,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:19,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:26:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:19,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:26:19,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:20,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:20,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:20,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562526357] [2024-11-24 01:26:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562526357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:20,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:20,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-24 01:26:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424276220] [2024-11-24 01:26:20,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:20,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:26:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:20,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:26:20,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:26:21,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-24 01:26:21,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 175 flow. Second operand has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:21,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:21,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-24 01:26:21,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:22,014 INFO L124 PetriNetUnfolderBase]: 628/1119 cut-off events. [2024-11-24 01:26:22,014 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-24 01:26:22,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 1119 events. 628/1119 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5302 event pairs, 221 based on Foata normal form. 0/848 useless extension candidates. Maximal degree in co-relation 2100. Up to 741 conditions per place. [2024-11-24 01:26:22,020 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 60 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-24 01:26:22,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 401 flow [2024-11-24 01:26:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:26:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:26:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-11-24 01:26:22,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-11-24 01:26:22,023 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 175 flow. Second operand 8 states and 157 transitions. [2024-11-24 01:26:22,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 401 flow [2024-11-24 01:26:22,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 395 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:26:22,026 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-11-24 01:26:22,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-24 01:26:22,026 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-11-24 01:26:22,026 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-11-24 01:26:22,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.0) internal successors, (130), 10 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:22,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:22,027 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:22,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:26:22,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:22,228 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:22,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:22,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1255016089, now seen corresponding path program 1 times [2024-11-24 01:26:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:22,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562062564] [2024-11-24 01:26:22,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:22,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:22,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:22,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:26:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:22,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-24 01:26:22,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:22,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:22,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:23,417 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:23,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562062564] [2024-11-24 01:26:23,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562062564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:23,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:23,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-24 01:26:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575642474] [2024-11-24 01:26:23,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:23,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:26:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:23,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:26:23,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:26:25,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-24 01:26:25,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 12 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:25,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:25,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-24 01:26:25,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:27,657 INFO L124 PetriNetUnfolderBase]: 615/1225 cut-off events. [2024-11-24 01:26:27,657 INFO L125 PetriNetUnfolderBase]: For 201/201 co-relation queries the response was YES. [2024-11-24 01:26:27,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1225 events. 615/1225 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 6678 event pairs, 390 based on Foata normal form. 44/1090 useless extension candidates. Maximal degree in co-relation 2149. Up to 321 conditions per place. [2024-11-24 01:26:27,686 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 81 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-11-24 01:26:27,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 546 flow [2024-11-24 01:26:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:26:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:26:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-11-24 01:26:27,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-24 01:26:27,688 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 10 states and 232 transitions. [2024-11-24 01:26:27,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 546 flow [2024-11-24 01:26:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 102 transitions, 533 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:27,694 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 253 flow [2024-11-24 01:26:27,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2024-11-24 01:26:27,695 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-11-24 01:26:27,696 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 253 flow [2024-11-24 01:26:27,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.666666666666666) internal successors, (188), 12 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:27,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:27,697 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:27,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:27,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:27,897 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:27,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:27,898 INFO L85 PathProgramCache]: Analyzing trace with hash -258144028, now seen corresponding path program 1 times [2024-11-24 01:26:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:27,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951245844] [2024-11-24 01:26:27,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:27,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:27,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:26:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:27,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-24 01:26:27,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:27,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:28,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:29,099 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951245844] [2024-11-24 01:26:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951245844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:29,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:29,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-24 01:26:29,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383516216] [2024-11-24 01:26:29,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:29,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:26:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:29,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:26:29,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:26:30,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-24 01:26:30,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 253 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:30,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:30,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-24 01:26:30,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:32,393 INFO L124 PetriNetUnfolderBase]: 644/1143 cut-off events. [2024-11-24 01:26:32,394 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2024-11-24 01:26:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 1143 events. 644/1143 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5200 event pairs, 323 based on Foata normal form. 32/1075 useless extension candidates. Maximal degree in co-relation 2277. Up to 265 conditions per place. [2024-11-24 01:26:32,399 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-24 01:26:32,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 571 flow [2024-11-24 01:26:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:26:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:26:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-11-24 01:26:32,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-11-24 01:26:32,402 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 253 flow. Second operand 10 states and 203 transitions. [2024-11-24 01:26:32,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 571 flow [2024-11-24 01:26:32,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 556 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:32,407 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 298 flow [2024-11-24 01:26:32,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=298, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2024-11-24 01:26:32,410 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-11-24 01:26:32,410 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 298 flow [2024-11-24 01:26:32,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:32,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:32,411 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-24 01:26:32,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:26:32,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:32,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:32,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1783852683, now seen corresponding path program 2 times [2024-11-24 01:26:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:32,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412354748] [2024-11-24 01:26:32,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:32,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:32,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:32,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:32,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:26:32,680 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:26:32,680 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:32,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:26:32,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:32,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:33,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:33,824 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412354748] [2024-11-24 01:26:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412354748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:33,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:33,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-24 01:26:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236635872] [2024-11-24 01:26:33,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:33,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:26:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:33,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:26:33,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:26:34,889 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:34,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 298 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:34,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:34,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:34,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:37,527 INFO L124 PetriNetUnfolderBase]: 598/1114 cut-off events. [2024-11-24 01:26:37,527 INFO L125 PetriNetUnfolderBase]: For 726/726 co-relation queries the response was YES. [2024-11-24 01:26:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1114 events. 598/1114 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5385 event pairs, 489 based on Foata normal form. 6/1120 useless extension candidates. Maximal degree in co-relation 2409. Up to 1042 conditions per place. [2024-11-24 01:26:37,533 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 35 selfloop transitions, 29 changer transitions 0/70 dead transitions. [2024-11-24 01:26:37,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 70 transitions, 600 flow [2024-11-24 01:26:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-24 01:26:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-24 01:26:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 373 transitions. [2024-11-24 01:26:37,536 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.444047619047619 [2024-11-24 01:26:37,536 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 298 flow. Second operand 21 states and 373 transitions. [2024-11-24 01:26:37,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 70 transitions, 600 flow [2024-11-24 01:26:37,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 70 transitions, 575 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:37,543 INFO L231 Difference]: Finished difference. Result has 93 places, 70 transitions, 535 flow [2024-11-24 01:26:37,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=535, PETRI_PLACES=93, PETRI_TRANSITIONS=70} [2024-11-24 01:26:37,544 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-11-24 01:26:37,544 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 70 transitions, 535 flow [2024-11-24 01:26:37,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:37,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:37,545 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:37,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:26:37,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:37,745 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:37,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1122058939, now seen corresponding path program 2 times [2024-11-24 01:26:37,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:37,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901899906] [2024-11-24 01:26:37,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:37,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:37,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:37,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:26:37,805 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:26:37,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:37,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 01:26:37,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:37,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:26:38,098 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:38,098 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901899906] [2024-11-24 01:26:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901899906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:38,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:38,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:26:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198412008] [2024-11-24 01:26:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:38,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:38,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:38,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:38,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:38,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:38,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 70 transitions, 535 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:38,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:38,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:38,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:38,503 INFO L124 PetriNetUnfolderBase]: 697/1279 cut-off events. [2024-11-24 01:26:38,503 INFO L125 PetriNetUnfolderBase]: For 819/819 co-relation queries the response was YES. [2024-11-24 01:26:38,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3615 conditions, 1279 events. 697/1279 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6338 event pairs, 291 based on Foata normal form. 16/1295 useless extension candidates. Maximal degree in co-relation 3543. Up to 605 conditions per place. [2024-11-24 01:26:38,509 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 74 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-11-24 01:26:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 796 flow [2024-11-24 01:26:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-24 01:26:38,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-24 01:26:38,511 INFO L175 Difference]: Start difference. First operand has 93 places, 70 transitions, 535 flow. Second operand 4 states and 100 transitions. [2024-11-24 01:26:38,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 796 flow [2024-11-24 01:26:38,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 708 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-24 01:26:38,518 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 496 flow [2024-11-24 01:26:38,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=496, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-11-24 01:26:38,519 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-11-24 01:26:38,520 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 496 flow [2024-11-24 01:26:38,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:38,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:38,521 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:38,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:26:38,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:38,721 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:38,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash -306635030, now seen corresponding path program 1 times [2024-11-24 01:26:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574225013] [2024-11-24 01:26:38,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:38,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:38,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:38,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:26:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:38,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:38,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:38,871 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:38,871 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574225013] [2024-11-24 01:26:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574225013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:26:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456098856] [2024-11-24 01:26:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:38,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:26:38,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:38,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:26:38,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:26:38,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:38,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:38,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:38,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:39,193 INFO L124 PetriNetUnfolderBase]: 713/1343 cut-off events. [2024-11-24 01:26:39,193 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2024-11-24 01:26:39,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 1343 events. 713/1343 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6691 event pairs, 201 based on Foata normal form. 3/1346 useless extension candidates. Maximal degree in co-relation 3863. Up to 965 conditions per place. [2024-11-24 01:26:39,201 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 77 selfloop transitions, 7 changer transitions 1/92 dead transitions. [2024-11-24 01:26:39,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 758 flow [2024-11-24 01:26:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:26:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:26:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-24 01:26:39,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 01:26:39,202 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 496 flow. Second operand 3 states and 84 transitions. [2024-11-24 01:26:39,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 758 flow [2024-11-24 01:26:39,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 92 transitions, 729 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:39,213 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 545 flow [2024-11-24 01:26:39,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=545, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-11-24 01:26:39,214 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-24 01:26:39,214 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 545 flow [2024-11-24 01:26:39,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:39,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:39,215 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:39,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:39,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:39,415 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:39,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash -262069647, now seen corresponding path program 2 times [2024-11-24 01:26:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:39,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787705525] [2024-11-24 01:26:39,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:39,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:39,418 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:39,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:26:39,482 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:26:39,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:39,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 01:26:39,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:39,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:26:39,839 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:39,839 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787705525] [2024-11-24 01:26:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787705525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:26:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504380964] [2024-11-24 01:26:39,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:39,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:39,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:39,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:39,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:26:39,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 545 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:39,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:39,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:26:39,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:40,391 INFO L124 PetriNetUnfolderBase]: 835/1485 cut-off events. [2024-11-24 01:26:40,391 INFO L125 PetriNetUnfolderBase]: For 1463/1483 co-relation queries the response was YES. [2024-11-24 01:26:40,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 1485 events. 835/1485 cut-off events. For 1463/1483 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6923 event pairs, 243 based on Foata normal form. 16/1501 useless extension candidates. Maximal degree in co-relation 4368. Up to 919 conditions per place. [2024-11-24 01:26:40,400 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 74 selfloop transitions, 17 changer transitions 0/94 dead transitions. [2024-11-24 01:26:40,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 799 flow [2024-11-24 01:26:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:40,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-24 01:26:40,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-24 01:26:40,401 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 545 flow. Second operand 4 states and 86 transitions. [2024-11-24 01:26:40,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 799 flow [2024-11-24 01:26:40,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:26:40,410 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 598 flow [2024-11-24 01:26:40,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=598, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-11-24 01:26:40,413 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-11-24 01:26:40,413 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 598 flow [2024-11-24 01:26:40,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:40,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:40,414 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:40,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:40,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:40,615 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:40,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:40,615 INFO L85 PathProgramCache]: Analyzing trace with hash -261832503, now seen corresponding path program 2 times [2024-11-24 01:26:40,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:40,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044568573] [2024-11-24 01:26:40,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:40,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:40,617 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:40,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:26:40,706 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:26:40,706 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:40,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:26:40,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:40,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 01:26:40,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 01:26:41,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044568573] [2024-11-24 01:26:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044568573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:41,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-24 01:26:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861931735] [2024-11-24 01:26:41,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:41,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:26:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:41,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:26:41,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:26:42,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:42,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:42,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:42,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:42,982 INFO L124 PetriNetUnfolderBase]: 743/1369 cut-off events. [2024-11-24 01:26:42,982 INFO L125 PetriNetUnfolderBase]: For 1265/1265 co-relation queries the response was YES. [2024-11-24 01:26:42,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 1369 events. 743/1369 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6696 event pairs, 405 based on Foata normal form. 22/1391 useless extension candidates. Maximal degree in co-relation 4084. Up to 964 conditions per place. [2024-11-24 01:26:42,990 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 68 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-11-24 01:26:42,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 881 flow [2024-11-24 01:26:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:26:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:26:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-24 01:26:42,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-24 01:26:42,992 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 598 flow. Second operand 5 states and 108 transitions. [2024-11-24 01:26:42,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 881 flow [2024-11-24 01:26:43,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 834 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-24 01:26:43,004 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 599 flow [2024-11-24 01:26:43,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=599, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-11-24 01:26:43,005 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-24 01:26:43,005 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 599 flow [2024-11-24 01:26:43,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:43,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:43,006 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:43,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 01:26:43,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:43,210 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:43,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash 465776066, now seen corresponding path program 2 times [2024-11-24 01:26:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871777028] [2024-11-24 01:26:43,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:43,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:43,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:43,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:26:43,310 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:26:43,310 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:43,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:26:43,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:43,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:26:43,515 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:43,515 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:43,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871777028] [2024-11-24 01:26:43,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871777028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:43,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:43,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:26:43,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085282612] [2024-11-24 01:26:43,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:43,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:26:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:43,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:26:43,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:26:43,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-24 01:26:43,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 599 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:43,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:43,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-24 01:26:43,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:44,123 INFO L124 PetriNetUnfolderBase]: 743/1321 cut-off events. [2024-11-24 01:26:44,123 INFO L125 PetriNetUnfolderBase]: For 1839/1839 co-relation queries the response was YES. [2024-11-24 01:26:44,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4071 conditions, 1321 events. 743/1321 cut-off events. For 1839/1839 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6060 event pairs, 294 based on Foata normal form. 64/1385 useless extension candidates. Maximal degree in co-relation 4009. Up to 655 conditions per place. [2024-11-24 01:26:44,129 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-24 01:26:44,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 866 flow [2024-11-24 01:26:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:26:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:26:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-24 01:26:44,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-24 01:26:44,131 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 599 flow. Second operand 5 states and 92 transitions. [2024-11-24 01:26:44,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 866 flow [2024-11-24 01:26:44,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 89 transitions, 792 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:26:44,138 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 557 flow [2024-11-24 01:26:44,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=557, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-11-24 01:26:44,138 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-11-24 01:26:44,138 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 557 flow [2024-11-24 01:26:44,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:44,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:44,139 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:44,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 01:26:44,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:44,343 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:44,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash -576727890, now seen corresponding path program 1 times [2024-11-24 01:26:44,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:44,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028210079] [2024-11-24 01:26:44,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:44,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:44,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:44,345 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:44,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:26:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:44,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:44,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:44,462 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:44,462 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028210079] [2024-11-24 01:26:44,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028210079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:44,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:44,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:44,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149278099] [2024-11-24 01:26:44,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:44,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:44,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:44,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:44,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:44,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:44,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 557 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:44,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:44,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:44,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:44,673 INFO L124 PetriNetUnfolderBase]: 821/1453 cut-off events. [2024-11-24 01:26:44,673 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-11-24 01:26:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1453 events. 821/1453 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6834 event pairs, 177 based on Foata normal form. 27/1480 useless extension candidates. Maximal degree in co-relation 4336. Up to 1128 conditions per place. [2024-11-24 01:26:44,678 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 93 selfloop transitions, 13 changer transitions 1/109 dead transitions. [2024-11-24 01:26:44,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 109 transitions, 953 flow [2024-11-24 01:26:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-24 01:26:44,679 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-24 01:26:44,679 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 557 flow. Second operand 4 states and 105 transitions. [2024-11-24 01:26:44,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 109 transitions, 953 flow [2024-11-24 01:26:44,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 907 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:26:44,686 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 677 flow [2024-11-24 01:26:44,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=677, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-11-24 01:26:44,686 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-11-24 01:26:44,686 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 677 flow [2024-11-24 01:26:44,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:44,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:44,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:44,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:26:44,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:44,891 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:44,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 541705994, now seen corresponding path program 2 times [2024-11-24 01:26:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:44,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722307757] [2024-11-24 01:26:44,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:44,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:44,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:44,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:26:44,965 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:26:44,965 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:44,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:44,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:44,983 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:44,983 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:44,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722307757] [2024-11-24 01:26:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722307757] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:44,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:44,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991354286] [2024-11-24 01:26:44,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:44,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:44,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:44,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:44,984 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:44,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:44,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:44,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:44,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:45,226 INFO L124 PetriNetUnfolderBase]: 809/1441 cut-off events. [2024-11-24 01:26:45,226 INFO L125 PetriNetUnfolderBase]: For 2039/2039 co-relation queries the response was YES. [2024-11-24 01:26:45,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 1441 events. 809/1441 cut-off events. For 2039/2039 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6968 event pairs, 390 based on Foata normal form. 12/1453 useless extension candidates. Maximal degree in co-relation 4687. Up to 979 conditions per place. [2024-11-24 01:26:45,232 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 100 selfloop transitions, 15 changer transitions 1/118 dead transitions. [2024-11-24 01:26:45,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1090 flow [2024-11-24 01:26:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-24 01:26:45,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-24 01:26:45,233 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 677 flow. Second operand 4 states and 103 transitions. [2024-11-24 01:26:45,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1090 flow [2024-11-24 01:26:45,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 1090 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 01:26:45,240 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 741 flow [2024-11-24 01:26:45,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=741, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2024-11-24 01:26:45,240 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-11-24 01:26:45,240 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 741 flow [2024-11-24 01:26:45,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:45,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:45,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:45,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:45,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:45,441 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:45,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 535540754, now seen corresponding path program 3 times [2024-11-24 01:26:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:45,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490276362] [2024-11-24 01:26:45,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:26:45,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:45,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:45,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:45,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:26:45,516 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:26:45,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:45,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:45,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:45,551 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:45,551 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490276362] [2024-11-24 01:26:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490276362] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:45,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:45,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026363488] [2024-11-24 01:26:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:45,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:45,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:45,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:45,552 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:45,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 741 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:45,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:45,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:45,782 INFO L124 PetriNetUnfolderBase]: 806/1423 cut-off events. [2024-11-24 01:26:45,782 INFO L125 PetriNetUnfolderBase]: For 3066/3066 co-relation queries the response was YES. [2024-11-24 01:26:45,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 1423 events. 806/1423 cut-off events. For 3066/3066 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6694 event pairs, 390 based on Foata normal form. 27/1450 useless extension candidates. Maximal degree in co-relation 5082. Up to 979 conditions per place. [2024-11-24 01:26:45,788 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 93 selfloop transitions, 26 changer transitions 2/123 dead transitions. [2024-11-24 01:26:45,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 123 transitions, 1210 flow [2024-11-24 01:26:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-24 01:26:45,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-24 01:26:45,789 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 741 flow. Second operand 4 states and 104 transitions. [2024-11-24 01:26:45,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 123 transitions, 1210 flow [2024-11-24 01:26:45,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 123 transitions, 1154 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-24 01:26:45,797 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 839 flow [2024-11-24 01:26:45,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=839, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-24 01:26:45,797 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-11-24 01:26:45,797 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 839 flow [2024-11-24 01:26:45,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:45,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:45,798 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:45,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:45,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:45,998 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:45,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:45,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1146250765, now seen corresponding path program 1 times [2024-11-24 01:26:45,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:45,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811291078] [2024-11-24 01:26:45,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:26:45,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:46,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:46,001 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:46,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:26:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:26:46,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:46,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:46,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:46,114 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811291078] [2024-11-24 01:26:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811291078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561227721] [2024-11-24 01:26:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:46,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:46,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:46,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:46,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:46,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:46,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 839 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:46,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:46,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:46,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:46,433 INFO L124 PetriNetUnfolderBase]: 764/1357 cut-off events. [2024-11-24 01:26:46,433 INFO L125 PetriNetUnfolderBase]: For 3580/3580 co-relation queries the response was YES. [2024-11-24 01:26:46,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5091 conditions, 1357 events. 764/1357 cut-off events. For 3580/3580 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6639 event pairs, 244 based on Foata normal form. 18/1375 useless extension candidates. Maximal degree in co-relation 5028. Up to 850 conditions per place. [2024-11-24 01:26:46,438 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 127 selfloop transitions, 8 changer transitions 3/140 dead transitions. [2024-11-24 01:26:46,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 140 transitions, 1412 flow [2024-11-24 01:26:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-24 01:26:46,439 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 01:26:46,439 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 839 flow. Second operand 4 states and 112 transitions. [2024-11-24 01:26:46,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 140 transitions, 1412 flow [2024-11-24 01:26:46,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 1350 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-24 01:26:46,444 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 838 flow [2024-11-24 01:26:46,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=838, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2024-11-24 01:26:46,444 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-11-24 01:26:46,444 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 838 flow [2024-11-24 01:26:46,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:46,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:46,445 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:46,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-24 01:26:46,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:46,645 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:46,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash 626289079, now seen corresponding path program 2 times [2024-11-24 01:26:46,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:46,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141939736] [2024-11-24 01:26:46,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:26:46,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:46,648 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:46,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:26:46,722 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:26:46,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:46,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:46,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:46,755 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:46,756 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141939736] [2024-11-24 01:26:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141939736] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:46,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:46,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:46,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062518505] [2024-11-24 01:26:46,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:46,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:46,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:46,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:46,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:46,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:46,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:46,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:46,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:47,026 INFO L124 PetriNetUnfolderBase]: 890/1567 cut-off events. [2024-11-24 01:26:47,027 INFO L125 PetriNetUnfolderBase]: For 4235/4235 co-relation queries the response was YES. [2024-11-24 01:26:47,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6398 conditions, 1567 events. 890/1567 cut-off events. For 4235/4235 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7595 event pairs, 237 based on Foata normal form. 42/1609 useless extension candidates. Maximal degree in co-relation 6334. Up to 1215 conditions per place. [2024-11-24 01:26:47,033 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 105 selfloop transitions, 16 changer transitions 2/125 dead transitions. [2024-11-24 01:26:47,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 125 transitions, 1296 flow [2024-11-24 01:26:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-24 01:26:47,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-24 01:26:47,034 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 838 flow. Second operand 4 states and 105 transitions. [2024-11-24 01:26:47,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 125 transitions, 1296 flow [2024-11-24 01:26:47,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 125 transitions, 1260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:26:47,039 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 952 flow [2024-11-24 01:26:47,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=952, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-11-24 01:26:47,040 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-11-24 01:26:47,040 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 952 flow [2024-11-24 01:26:47,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:47,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:47,040 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:26:47,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-24 01:26:47,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:47,241 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:47,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1946202453, now seen corresponding path program 3 times [2024-11-24 01:26:47,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:47,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293212403] [2024-11-24 01:26:47,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:26:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:47,245 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:47,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 01:26:47,317 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 01:26:47,317 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:47,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 01:26:47,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:26:47,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:26:47,350 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293212403] [2024-11-24 01:26:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293212403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:26:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:26:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:26:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117402473] [2024-11-24 01:26:47,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:26:47,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:26:47,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:47,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:26:47,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:26:47,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:26:47,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 952 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:47,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:47,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:26:47,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:26:47,607 INFO L124 PetriNetUnfolderBase]: 869/1510 cut-off events. [2024-11-24 01:26:47,608 INFO L125 PetriNetUnfolderBase]: For 5010/5010 co-relation queries the response was YES. [2024-11-24 01:26:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 1510 events. 869/1510 cut-off events. For 5010/5010 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7208 event pairs, 264 based on Foata normal form. 42/1552 useless extension candidates. Maximal degree in co-relation 6394. Up to 892 conditions per place. [2024-11-24 01:26:47,614 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 117 selfloop transitions, 29 changer transitions 2/150 dead transitions. [2024-11-24 01:26:47,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 150 transitions, 1586 flow [2024-11-24 01:26:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:26:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:26:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-24 01:26:47,615 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 01:26:47,615 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 952 flow. Second operand 4 states and 112 transitions. [2024-11-24 01:26:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 150 transitions, 1586 flow [2024-11-24 01:26:47,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1556 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-24 01:26:47,626 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 1115 flow [2024-11-24 01:26:47,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1115, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-11-24 01:26:47,626 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-11-24 01:26:47,626 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 1115 flow [2024-11-24 01:26:47,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:47,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:26:47,627 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-11-24 01:26:47,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 01:26:47,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:47,827 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:26:47,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:26:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1217053519, now seen corresponding path program 3 times [2024-11-24 01:26:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:26:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474365609] [2024-11-24 01:26:47,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:26:47,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:26:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:26:47,830 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:26:47,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 01:26:48,245 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-24 01:26:48,245 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:26:48,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 01:26:48,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:26:48,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-24 01:26:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:48,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:26:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:26:51,483 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:26:51,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474365609] [2024-11-24 01:26:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474365609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:26:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:26:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-11-24 01:26:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605329270] [2024-11-24 01:26:51,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:26:51,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 01:26:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:26:51,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 01:26:51,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:26:55,415 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-24 01:26:55,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 1115 flow. Second operand has 26 states, 26 states have (on average 16.76923076923077) internal successors, (436), 26 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:26:55,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:26:55,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-24 01:26:55,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:27:13,964 INFO L124 PetriNetUnfolderBase]: 860/1501 cut-off events. [2024-11-24 01:27:13,964 INFO L125 PetriNetUnfolderBase]: For 6699/6699 co-relation queries the response was YES. [2024-11-24 01:27:13,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6968 conditions, 1501 events. 860/1501 cut-off events. For 6699/6699 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6780 event pairs, 504 based on Foata normal form. 12/1513 useless extension candidates. Maximal degree in co-relation 6697. Up to 1455 conditions per place. [2024-11-24 01:27:13,972 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 81 selfloop transitions, 65 changer transitions 0/147 dead transitions. [2024-11-24 01:27:13,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 147 transitions, 1755 flow [2024-11-24 01:27:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-24 01:27:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-24 01:27:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 775 transitions. [2024-11-24 01:27:13,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-24 01:27:13,976 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 1115 flow. Second operand 45 states and 775 transitions. [2024-11-24 01:27:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 147 transitions, 1755 flow [2024-11-24 01:27:13,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 147 transitions, 1715 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-24 01:27:13,988 INFO L231 Difference]: Finished difference. Result has 150 places, 147 transitions, 1607 flow [2024-11-24 01:27:13,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1607, PETRI_PLACES=150, PETRI_TRANSITIONS=147} [2024-11-24 01:27:13,988 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-11-24 01:27:13,988 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 147 transitions, 1607 flow [2024-11-24 01:27:13,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.76923076923077) internal successors, (436), 26 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:27:13,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:27:13,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:27:14,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 01:27:14,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:14,190 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:27:14,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:27:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1535330165, now seen corresponding path program 1 times [2024-11-24 01:27:14,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:27:14,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498223806] [2024-11-24 01:27:14,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:27:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:27:14,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:27:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 01:27:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:27:14,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 01:27:14,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:27:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:27:14,308 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:27:14,308 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:27:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498223806] [2024-11-24 01:27:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498223806] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:27:14,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:27:14,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:27:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078569488] [2024-11-24 01:27:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:27:14,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:27:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:27:14,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:27:14,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:27:14,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:27:14,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 147 transitions, 1607 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:27:14,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:27:14,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:27:14,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:27:14,722 INFO L124 PetriNetUnfolderBase]: 1079/1870 cut-off events. [2024-11-24 01:27:14,722 INFO L125 PetriNetUnfolderBase]: For 6213/6213 co-relation queries the response was YES. [2024-11-24 01:27:14,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8468 conditions, 1870 events. 1079/1870 cut-off events. For 6213/6213 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8931 event pairs, 275 based on Foata normal form. 72/1942 useless extension candidates. Maximal degree in co-relation 8368. Up to 892 conditions per place. [2024-11-24 01:27:14,730 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 182 selfloop transitions, 32 changer transitions 0/216 dead transitions. [2024-11-24 01:27:14,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 216 transitions, 2522 flow [2024-11-24 01:27:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:27:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:27:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-24 01:27:14,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-11-24 01:27:14,732 INFO L175 Difference]: Start difference. First operand has 150 places, 147 transitions, 1607 flow. Second operand 5 states and 138 transitions. [2024-11-24 01:27:14,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 216 transitions, 2522 flow [2024-11-24 01:27:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2338 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-11-24 01:27:14,751 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1528 flow [2024-11-24 01:27:14,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1528, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-11-24 01:27:14,751 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-11-24 01:27:14,751 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1528 flow [2024-11-24 01:27:14,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:27:14,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:27:14,752 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:27:14,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-24 01:27:14,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:14,952 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:27:14,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:27:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1842165169, now seen corresponding path program 2 times [2024-11-24 01:27:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:27:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076959549] [2024-11-24 01:27:14,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:27:14,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:14,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:27:14,955 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:27:14,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 01:27:15,037 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:27:15,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:27:15,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 01:27:15,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:27:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:27:15,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:27:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:27:15,246 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:27:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076959549] [2024-11-24 01:27:15,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076959549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:27:15,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:27:15,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-24 01:27:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544862862] [2024-11-24 01:27:15,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:27:15,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:27:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:27:15,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:27:15,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:27:15,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:27:15,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1528 flow. Second operand has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 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) [2024-11-24 01:27:15,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:27:15,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:27:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:27:16,138 INFO L124 PetriNetUnfolderBase]: 1421/2446 cut-off events. [2024-11-24 01:27:16,138 INFO L125 PetriNetUnfolderBase]: For 9401/9401 co-relation queries the response was YES. [2024-11-24 01:27:16,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11584 conditions, 2446 events. 1421/2446 cut-off events. For 9401/9401 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 12219 event pairs, 191 based on Foata normal form. 156/2602 useless extension candidates. Maximal degree in co-relation 11494. Up to 703 conditions per place. [2024-11-24 01:27:16,147 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 231 selfloop transitions, 44 changer transitions 0/277 dead transitions. [2024-11-24 01:27:16,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 277 transitions, 3031 flow [2024-11-24 01:27:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:27:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:27:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-11-24 01:27:16,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6928571428571428 [2024-11-24 01:27:16,148 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1528 flow. Second operand 7 states and 194 transitions. [2024-11-24 01:27:16,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 277 transitions, 3031 flow [2024-11-24 01:27:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 277 transitions, 2976 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-24 01:27:16,170 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1687 flow [2024-11-24 01:27:16,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1687, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-11-24 01:27:16,171 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-11-24 01:27:16,171 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1687 flow [2024-11-24 01:27:16,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 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) [2024-11-24 01:27:16,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:27:16,171 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:27:16,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-24 01:27:16,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:16,372 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:27:16,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:27:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1383411061, now seen corresponding path program 3 times [2024-11-24 01:27:16,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:27:16,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028295781] [2024-11-24 01:27:16,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:27:16,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:27:16,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:27:16,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 01:27:16,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:27:16,463 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:27:16,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-24 01:27:16,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:27:16,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:27:16,846 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 01:27:16,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 01:27:16,853 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 10 [2024-11-24 01:27:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:27:16,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:27:18,063 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 33 treesize of output 29 [2024-11-24 01:27:18,087 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-24 01:27:18,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 69 [2024-11-24 01:27:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:27:18,293 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 01:27:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028295781] [2024-11-24 01:27:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028295781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:27:18,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:27:18,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-24 01:27:18,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190033322] [2024-11-24 01:27:18,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:27:18,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:27:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 01:27:18,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:27:18,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:27:20,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-24 01:27:20,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1687 flow. Second operand has 15 states, 15 states have (on average 18.866666666666667) internal successors, (283), 15 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:27:20,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:27:20,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-24 01:27:20,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:27:22,592 INFO L124 PetriNetUnfolderBase]: 1709/2940 cut-off events. [2024-11-24 01:27:22,592 INFO L125 PetriNetUnfolderBase]: For 15351/15351 co-relation queries the response was YES. [2024-11-24 01:27:22,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14727 conditions, 2940 events. 1709/2940 cut-off events. For 15351/15351 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14312 event pairs, 279 based on Foata normal form. 3/2943 useless extension candidates. Maximal degree in co-relation 14635. Up to 1457 conditions per place. [2024-11-24 01:27:22,613 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 116 selfloop transitions, 79 changer transitions 63/260 dead transitions. [2024-11-24 01:27:22,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 260 transitions, 2978 flow [2024-11-24 01:27:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:27:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-24 01:27:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-11-24 01:27:22,618 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6295454545454545 [2024-11-24 01:27:22,618 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1687 flow. Second operand 11 states and 277 transitions. [2024-11-24 01:27:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 260 transitions, 2978 flow [2024-11-24 01:27:22,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 260 transitions, 2767 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-11-24 01:27:22,656 INFO L231 Difference]: Finished difference. Result has 149 places, 160 transitions, 1699 flow [2024-11-24 01:27:22,656 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1699, PETRI_PLACES=149, PETRI_TRANSITIONS=160} [2024-11-24 01:27:22,657 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-11-24 01:27:22,657 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 160 transitions, 1699 flow [2024-11-24 01:27:22,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.866666666666667) internal successors, (283), 15 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:27:22,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:27:22,658 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:27:22,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 01:27:22,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:22,858 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-24 01:27:22,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:27:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 34927269, now seen corresponding path program 4 times [2024-11-24 01:27:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 01:27:22,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186817222] [2024-11-24 01:27:22,859 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:27:22,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:27:22,861 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:27:22,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8f8df0f-51ca-44cb-8ac6-b1ee9af44b54/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 01:27:22,967 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:27:22,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:27:22,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-24 01:27:22,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:27:23,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 01:27:24,169 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-24 01:27:24,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 45 [2024-11-24 01:27:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:27:24,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:27:51,019 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 532 treesize of output 468 [2024-11-24 01:27:56,425 WARN L286 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 251 DAG size of output: 248 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-24 01:27:56,425 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-24 01:27:56,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 6599 treesize of output 3996 [2024-11-24 01:30:42,469 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-24 01:32:01,220 WARN L286 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)