./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:58:23,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:58:23,973 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 13:58:23,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:58:23,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:58:24,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:58:24,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:58:24,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:58:24,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:58:24,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:58:24,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:58:24,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:58:24,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:58:24,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:58:24,017 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:58:24,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:58:24,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:58:24,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:58:24,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:58:24,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:58:24,018 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:58:24,018 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:58:24,018 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:58:24,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:58:24,019 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:58:24,019 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:58:24,019 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:58:24,019 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:58:24,019 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:58:24,019 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:58:24,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:58:24,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:58:24,021 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:58:24,021 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:58:24,021 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_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af [2024-11-13 13:58:24,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:58:24,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:58:24,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:58:24,473 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:58:24,474 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:58:24,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c Unable to find full path for "g++" [2024-11-13 13:58:26,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:58:26,969 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:58:26,970 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2024-11-13 13:58:26,980 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/data/5fcf9655f/7faf159bffce4744ba71ea3263a0325d/FLAGd4c876a3e [2024-11-13 13:58:26,999 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/data/5fcf9655f/7faf159bffce4744ba71ea3263a0325d [2024-11-13 13:58:27,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:58:27,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:58:27,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:58:27,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:58:27,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:58:27,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,018 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f81b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27, skipping insertion in model container [2024-11-13 13:58:27,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:58:27,236 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 13:58:27,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:58:27,253 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:58:27,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:58:27,291 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:58:27,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27 WrapperNode [2024-11-13 13:58:27,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:58:27,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:58:27,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:58:27,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:58:27,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,334 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-13 13:58:27,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:58:27,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:58:27,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:58:27,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:58:27,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,369 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-13 13:58:27,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:58:27,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:58:27,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:58:27,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:58:27,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (1/1) ... [2024-11-13 13:58:27,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:58:27,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:27,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:58:27,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:58:27,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:58:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:58:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 13:58:27,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:58:27,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:58:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:58:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:58:27,464 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 13:58:27,589 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:58:27,591 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:58:27,929 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:58:27,929 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:58:28,222 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:58:28,222 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 13:58:28,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:58:28 BoogieIcfgContainer [2024-11-13 13:58:28,223 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:58:28,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:58:28,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:58:28,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:58:28,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:58:27" (1/3) ... [2024-11-13 13:58:28,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34c061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:58:28, skipping insertion in model container [2024-11-13 13:58:28,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:58:27" (2/3) ... [2024-11-13 13:58:28,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e34c061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:58:28, skipping insertion in model container [2024-11-13 13:58:28,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:58:28" (3/3) ... [2024-11-13 13:58:28,237 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2024-11-13 13:58:28,255 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:58:28,257 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-le-max.wvr.c that has 4 procedures, 48 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2024-11-13 13:58:28,257 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:58:28,342 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 13:58:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 121 flow [2024-11-13 13:58:28,448 INFO L124 PetriNetUnfolderBase]: 3/47 cut-off events. [2024-11-13 13:58:28,453 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 13:58:28,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 3/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 104 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-13 13:58:28,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 121 flow [2024-11-13 13:58:28,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 110 flow [2024-11-13 13:58:28,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:58:28,484 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;@4ce5af9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:58:28,485 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-13 13:58:28,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:58:28,489 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 13:58:28,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:58:28,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:28,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:58:28,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:28,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash 441720, now seen corresponding path program 1 times [2024-11-13 13:58:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:28,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341508311] [2024-11-13 13:58:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:28,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:28,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341508311] [2024-11-13 13:58:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341508311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:28,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:28,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 13:58:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904154605] [2024-11-13 13:58:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:28,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:58:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:58:28,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:58:28,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:28,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:28,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:28,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:28,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:29,229 INFO L124 PetriNetUnfolderBase]: 465/794 cut-off events. [2024-11-13 13:58:29,230 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-13 13:58:29,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 794 events. 465/794 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4030 event pairs, 388 based on Foata normal form. 1/586 useless extension candidates. Maximal degree in co-relation 1502. Up to 712 conditions per place. [2024-11-13 13:58:29,243 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 27 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-13 13:58:29,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 154 flow [2024-11-13 13:58:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:58:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:58:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-13 13:58:29,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-11-13 13:58:29,263 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 110 flow. Second operand 3 states and 77 transitions. [2024-11-13 13:58:29,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 154 flow [2024-11-13 13:58:29,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:58:29,273 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2024-11-13 13:58:29,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-13 13:58:29,282 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-13 13:58:29,282 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2024-11-13 13:58:29,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:29,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:29,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:58:29,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:58:29,284 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:29,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 441721, now seen corresponding path program 1 times [2024-11-13 13:58:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891265218] [2024-11-13 13:58:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:29,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891265218] [2024-11-13 13:58:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891265218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:29,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:29,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:58:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183227933] [2024-11-13 13:58:29,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:29,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:29,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:29,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:29,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:29,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:29,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:30,209 INFO L124 PetriNetUnfolderBase]: 465/793 cut-off events. [2024-11-13 13:58:30,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:58:30,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 793 events. 465/793 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3989 event pairs, 388 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 1542. Up to 712 conditions per place. [2024-11-13 13:58:30,216 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 25 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-13 13:58:30,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 144 flow [2024-11-13 13:58:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-13 13:58:30,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-11-13 13:58:30,218 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 86 transitions. [2024-11-13 13:58:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 144 flow [2024-11-13 13:58:30,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:58:30,220 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 90 flow [2024-11-13 13:58:30,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-13 13:58:30,221 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-13 13:58:30,222 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 90 flow [2024-11-13 13:58:30,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:30,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:30,222 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:58:30,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:58:30,222 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:30,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash 441718, now seen corresponding path program 1 times [2024-11-13 13:58:30,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:30,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160198152] [2024-11-13 13:58:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:30,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160198152] [2024-11-13 13:58:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160198152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:58:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451854975] [2024-11-13 13:58:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:30,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:30,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-13 13:58:30,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-13 13:58:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:30,486 INFO L124 PetriNetUnfolderBase]: 328/562 cut-off events. [2024-11-13 13:58:30,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:58:30,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 562 events. 328/562 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2545 event pairs, 263 based on Foata normal form. 0/457 useless extension candidates. Maximal degree in co-relation 1092. Up to 504 conditions per place. [2024-11-13 13:58:30,491 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 25 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-13 13:58:30,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 136 flow [2024-11-13 13:58:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-13 13:58:30,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-11-13 13:58:30,493 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 90 flow. Second operand 4 states and 79 transitions. [2024-11-13 13:58:30,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 136 flow [2024-11-13 13:58:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:58:30,494 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2024-11-13 13:58:30,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-13 13:58:30,495 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -15 predicate places. [2024-11-13 13:58:30,496 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2024-11-13 13:58:30,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:30,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:30,496 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:58:30,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:58:30,496 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:30,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 441719, now seen corresponding path program 1 times [2024-11-13 13:58:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331559346] [2024-11-13 13:58:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331559346] [2024-11-13 13:58:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331559346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:30,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:58:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659075134] [2024-11-13 13:58:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:30,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:58:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:58:30,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:58:30,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-13 13:58:30,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:30,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:30,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-13 13:58:30,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:30,799 INFO L124 PetriNetUnfolderBase]: 328/564 cut-off events. [2024-11-13 13:58:30,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:58:30,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 564 events. 328/564 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2542 event pairs, 263 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 1092. Up to 508 conditions per place. [2024-11-13 13:58:30,804 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-13 13:58:30,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 140 flow [2024-11-13 13:58:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:58:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:58:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-13 13:58:30,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 13:58:30,808 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 3 states and 75 transitions. [2024-11-13 13:58:30,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 140 flow [2024-11-13 13:58:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:58:30,810 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 87 flow [2024-11-13 13:58:30,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-13 13:58:30,811 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -14 predicate places. [2024-11-13 13:58:30,811 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 87 flow [2024-11-13 13:58:30,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:30,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:30,812 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 13:58:30,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 13:58:30,812 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:30,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash 424507955, now seen corresponding path program 1 times [2024-11-13 13:58:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413620856] [2024-11-13 13:58:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:30,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:30,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413620856] [2024-11-13 13:58:30,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413620856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:30,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140718146] [2024-11-13 13:58:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:30,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:30,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:30,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:30,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:58:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:31,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 13:58:31,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:31,159 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 [2024-11-13 13:58:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:31,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140718146] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:31,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:58:31,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2024-11-13 13:58:31,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917766996] [2024-11-13 13:58:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:31,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:58:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:58:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:58:31,347 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-13 13:58:31,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:31,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:31,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-13 13:58:31,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:31,566 INFO L124 PetriNetUnfolderBase]: 328/562 cut-off events. [2024-11-13 13:58:31,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:58:31,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 562 events. 328/562 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2545 event pairs, 263 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 1099. Up to 504 conditions per place. [2024-11-13 13:58:31,574 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 26 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-13 13:58:31,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 143 flow [2024-11-13 13:58:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:58:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:58:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-13 13:58:31,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-13 13:58:31,577 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 87 flow. Second operand 5 states and 96 transitions. [2024-11-13 13:58:31,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 143 flow [2024-11-13 13:58:31,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:58:31,579 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 87 flow [2024-11-13 13:58:31,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-11-13 13:58:31,580 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -13 predicate places. [2024-11-13 13:58:31,580 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 87 flow [2024-11-13 13:58:31,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:31,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:31,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:31,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:58:31,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:31,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:31,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1303173352, now seen corresponding path program 1 times [2024-11-13 13:58:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270282489] [2024-11-13 13:58:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270282489] [2024-11-13 13:58:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270282489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:31,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:58:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50742941] [2024-11-13 13:58:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:31,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:32,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-13 13:58:32,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:32,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:32,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-13 13:58:32,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:32,226 INFO L124 PetriNetUnfolderBase]: 484/804 cut-off events. [2024-11-13 13:58:32,226 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 13:58:32,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 804 events. 484/804 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3829 event pairs, 191 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1564. Up to 535 conditions per place. [2024-11-13 13:58:32,233 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 38 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-13 13:58:32,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 201 flow [2024-11-13 13:58:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-13 13:58:32,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-13 13:58:32,235 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 87 flow. Second operand 4 states and 94 transitions. [2024-11-13 13:58:32,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 201 flow [2024-11-13 13:58:32,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:58:32,237 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 105 flow [2024-11-13 13:58:32,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-11-13 13:58:32,238 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-13 13:58:32,238 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 105 flow [2024-11-13 13:58:32,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:32,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:32,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:32,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 13:58:32,238 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:32,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1803183906, now seen corresponding path program 1 times [2024-11-13 13:58:32,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195557554] [2024-11-13 13:58:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:32,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:32,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195557554] [2024-11-13 13:58:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195557554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:32,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:32,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:58:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172372661] [2024-11-13 13:58:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:32,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:32,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:32,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:32,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-13 13:58:32,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 105 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) [2024-11-13 13:58:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-13 13:58:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:32,645 INFO L124 PetriNetUnfolderBase]: 714/1153 cut-off events. [2024-11-13 13:58:32,645 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2024-11-13 13:58:32,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1153 events. 714/1153 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5607 event pairs, 329 based on Foata normal form. 0/1064 useless extension candidates. Maximal degree in co-relation 2598. Up to 767 conditions per place. [2024-11-13 13:58:32,654 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 41 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-13 13:58:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 242 flow [2024-11-13 13:58:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-13 13:58:32,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-11-13 13:58:32,656 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 105 flow. Second operand 4 states and 93 transitions. [2024-11-13 13:58:32,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 242 flow [2024-11-13 13:58:32,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:58:32,658 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 121 flow [2024-11-13 13:58:32,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-11-13 13:58:32,659 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2024-11-13 13:58:32,659 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 121 flow [2024-11-13 13:58:32,659 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) [2024-11-13 13:58:32,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:32,659 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:32,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 13:58:32,660 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:32,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 628453058, now seen corresponding path program 1 times [2024-11-13 13:58:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:32,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163737086] [2024-11-13 13:58:32,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:32,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:32,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:32,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163737086] [2024-11-13 13:58:32,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163737086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:32,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493730534] [2024-11-13 13:58:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:32,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:32,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:32,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:58:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:32,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:58:32,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:33,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493730534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:33,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:33,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 13:58:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27819797] [2024-11-13 13:58:33,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:33,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:58:33,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:58:33,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:58:33,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:33,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 121 flow. Second operand has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:33,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:33,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:33,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:33,955 INFO L124 PetriNetUnfolderBase]: 1475/2316 cut-off events. [2024-11-13 13:58:33,956 INFO L125 PetriNetUnfolderBase]: For 873/873 co-relation queries the response was YES. [2024-11-13 13:58:33,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5832 conditions, 2316 events. 1475/2316 cut-off events. For 873/873 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12052 event pairs, 868 based on Foata normal form. 44/2303 useless extension candidates. Maximal degree in co-relation 3499. Up to 1317 conditions per place. [2024-11-13 13:58:33,973 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 79 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2024-11-13 13:58:33,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 483 flow [2024-11-13 13:58:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 13:58:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 13:58:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-13 13:58:33,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-13 13:58:33,975 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 121 flow. Second operand 8 states and 192 transitions. [2024-11-13 13:58:33,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 483 flow [2024-11-13 13:58:33,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 93 transitions, 467 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:58:33,979 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 195 flow [2024-11-13 13:58:33,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-11-13 13:58:33,981 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-11-13 13:58:33,982 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 195 flow [2024-11-13 13:58:33,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:33,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:33,982 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:34,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 13:58:34,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:34,183 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:34,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1495251467, now seen corresponding path program 1 times [2024-11-13 13:58:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:34,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002342496] [2024-11-13 13:58:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:34,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002342496] [2024-11-13 13:58:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002342496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536341817] [2024-11-13 13:58:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:34,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:34,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:34,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:34,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:58:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:34,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:58:34,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:34,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536341817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:34,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 13:58:34,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881069239] [2024-11-13 13:58:34,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:34,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:58:34,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:58:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:58:34,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:34,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 195 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:34,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:34,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:34,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:35,258 INFO L124 PetriNetUnfolderBase]: 1290/1978 cut-off events. [2024-11-13 13:58:35,258 INFO L125 PetriNetUnfolderBase]: For 1833/1883 co-relation queries the response was YES. [2024-11-13 13:58:35,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1978 events. 1290/1978 cut-off events. For 1833/1883 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9774 event pairs, 801 based on Foata normal form. 32/1958 useless extension candidates. Maximal degree in co-relation 3576. Up to 1319 conditions per place. [2024-11-13 13:58:35,274 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 71 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-11-13 13:58:35,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 507 flow [2024-11-13 13:58:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 13:58:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 13:58:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-11-13 13:58:35,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-11-13 13:58:35,277 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 195 flow. Second operand 8 states and 187 transitions. [2024-11-13 13:58:35,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 507 flow [2024-11-13 13:58:35,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 493 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 13:58:35,283 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 240 flow [2024-11-13 13:58:35,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=240, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-11-13 13:58:35,284 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-11-13 13:58:35,285 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 240 flow [2024-11-13 13:58:35,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:35,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:35,285 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:35,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:58:35,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:35,490 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:35,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 712274046, now seen corresponding path program 2 times [2024-11-13 13:58:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:35,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767672628] [2024-11-13 13:58:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:35,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:35,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767672628] [2024-11-13 13:58:35,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767672628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:35,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152374767] [2024-11-13 13:58:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:58:35,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:35,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:35,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:58:36,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:58:36,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:58:36,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 13:58:36,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:36,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:36,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-13 13:58:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152374767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:36,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-13 13:58:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637621692] [2024-11-13 13:58:36,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:36,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:58:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:58:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:58:36,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-13 13:58:36,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 240 flow. Second operand has 19 states, 19 states have (on average 14.842105263157896) internal successors, (282), 19 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:36,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:36,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-13 13:58:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:38,100 INFO L124 PetriNetUnfolderBase]: 1269/2044 cut-off events. [2024-11-13 13:58:38,101 INFO L125 PetriNetUnfolderBase]: For 2354/2411 co-relation queries the response was YES. [2024-11-13 13:58:38,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 2044 events. 1269/2044 cut-off events. For 2354/2411 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10487 event pairs, 436 based on Foata normal form. 44/2026 useless extension candidates. Maximal degree in co-relation 4174. Up to 678 conditions per place. [2024-11-13 13:58:38,118 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 99 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-11-13 13:58:38,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 712 flow [2024-11-13 13:58:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:58:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:58:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-11-13 13:58:38,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.466 [2024-11-13 13:58:38,120 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 240 flow. Second operand 10 states and 233 transitions. [2024-11-13 13:58:38,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 712 flow [2024-11-13 13:58:38,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 693 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 13:58:38,129 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 287 flow [2024-11-13 13:58:38,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=287, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2024-11-13 13:58:38,129 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 17 predicate places. [2024-11-13 13:58:38,130 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 287 flow [2024-11-13 13:58:38,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.842105263157896) internal successors, (282), 19 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:38,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:38,130 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:38,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:58:38,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 13:58:38,335 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:38,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1747306673, now seen corresponding path program 2 times [2024-11-13 13:58:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632093281] [2024-11-13 13:58:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632093281] [2024-11-13 13:58:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632093281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375818085] [2024-11-13 13:58:38,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:58:38,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:38,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:38,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:58:38,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:58:38,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:58:38,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 13:58:38,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:39,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:39,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-13 13:58:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375818085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:39,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:39,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-13 13:58:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625993857] [2024-11-13 13:58:39,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:39,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:58:39,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:58:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:58:40,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-13 13:58:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 287 flow. Second operand has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:40,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:40,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-13 13:58:40,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:41,301 INFO L124 PetriNetUnfolderBase]: 1571/2512 cut-off events. [2024-11-13 13:58:41,301 INFO L125 PetriNetUnfolderBase]: For 5394/5512 co-relation queries the response was YES. [2024-11-13 13:58:41,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8320 conditions, 2512 events. 1571/2512 cut-off events. For 5394/5512 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12972 event pairs, 549 based on Foata normal form. 56/2505 useless extension candidates. Maximal degree in co-relation 6386. Up to 877 conditions per place. [2024-11-13 13:58:41,331 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 107 selfloop transitions, 14 changer transitions 0/126 dead transitions. [2024-11-13 13:58:41,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 898 flow [2024-11-13 13:58:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:58:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:58:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-11-13 13:58:41,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.458 [2024-11-13 13:58:41,334 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 287 flow. Second operand 10 states and 229 transitions. [2024-11-13 13:58:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 898 flow [2024-11-13 13:58:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 126 transitions, 806 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-11-13 13:58:41,352 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 313 flow [2024-11-13 13:58:41,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=313, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2024-11-13 13:58:41,354 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-11-13 13:58:41,354 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 313 flow [2024-11-13 13:58:41,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.052631578947368) internal successors, (286), 19 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:41,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:41,356 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:41,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 13:58:41,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 13:58:41,558 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:41,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2076792980, now seen corresponding path program 3 times [2024-11-13 13:58:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:41,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563958747] [2024-11-13 13:58:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:41,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:41,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:41,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563958747] [2024-11-13 13:58:41,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563958747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:41,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618803563] [2024-11-13 13:58:41,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:58:41,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:41,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:41,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:41,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:58:41,863 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:58:41,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:58:41,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 13:58:41,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:58:42,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:42,336 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 13 treesize of output 11 [2024-11-13 13:58:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:58:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618803563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:42,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-13 13:58:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024711135] [2024-11-13 13:58:42,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:42,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 13:58:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 13:58:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:58:42,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 313 flow. Second operand has 20 states, 20 states have (on average 16.35) internal successors, (327), 20 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:44,605 INFO L124 PetriNetUnfolderBase]: 3064/4620 cut-off events. [2024-11-13 13:58:44,605 INFO L125 PetriNetUnfolderBase]: For 9743/9889 co-relation queries the response was YES. [2024-11-13 13:58:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16551 conditions, 4620 events. 3064/4620 cut-off events. For 9743/9889 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25262 event pairs, 655 based on Foata normal form. 112/4678 useless extension candidates. Maximal degree in co-relation 8836. Up to 945 conditions per place. [2024-11-13 13:58:44,744 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 206 selfloop transitions, 27 changer transitions 0/237 dead transitions. [2024-11-13 13:58:44,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 237 transitions, 1818 flow [2024-11-13 13:58:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:58:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 13:58:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 381 transitions. [2024-11-13 13:58:44,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47625 [2024-11-13 13:58:44,748 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 313 flow. Second operand 16 states and 381 transitions. [2024-11-13 13:58:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 237 transitions, 1818 flow [2024-11-13 13:58:44,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 237 transitions, 1623 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-11-13 13:58:44,770 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 454 flow [2024-11-13 13:58:44,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=454, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-11-13 13:58:44,772 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 37 predicate places. [2024-11-13 13:58:44,772 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 454 flow [2024-11-13 13:58:44,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.35) internal successors, (327), 20 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:44,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:44,773 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:44,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 13:58:44,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 13:58:44,973 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:44,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -990011070, now seen corresponding path program 3 times [2024-11-13 13:58:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134905300] [2024-11-13 13:58:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134905300] [2024-11-13 13:58:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134905300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307644872] [2024-11-13 13:58:45,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:58:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:45,187 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:58:45,298 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:58:45,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:58:45,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 13:58:45,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:45,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 13:58:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 13:58:46,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 13:58:46,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307644872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:46,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:46,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-13 13:58:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997809096] [2024-11-13 13:58:46,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:46,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:58:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:58:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:58:46,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-13 13:58:46,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 454 flow. Second operand has 21 states, 21 states have (on average 14.571428571428571) internal successors, (306), 21 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:46,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:46,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-13 13:58:46,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:48,977 INFO L124 PetriNetUnfolderBase]: 2745/4185 cut-off events. [2024-11-13 13:58:48,977 INFO L125 PetriNetUnfolderBase]: For 14461/14631 co-relation queries the response was YES. [2024-11-13 13:58:48,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16274 conditions, 4185 events. 2745/4185 cut-off events. For 14461/14631 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23233 event pairs, 409 based on Foata normal form. 94/4193 useless extension candidates. Maximal degree in co-relation 8478. Up to 644 conditions per place. [2024-11-13 13:58:49,011 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 210 selfloop transitions, 26 changer transitions 0/242 dead transitions. [2024-11-13 13:58:49,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 242 transitions, 2034 flow [2024-11-13 13:58:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 13:58:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 13:58:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 387 transitions. [2024-11-13 13:58:49,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-11-13 13:58:49,018 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 454 flow. Second operand 18 states and 387 transitions. [2024-11-13 13:58:49,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 242 transitions, 2034 flow [2024-11-13 13:58:49,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 242 transitions, 1893 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-11-13 13:58:49,041 INFO L231 Difference]: Finished difference. Result has 104 places, 74 transitions, 529 flow [2024-11-13 13:58:49,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=529, PETRI_PLACES=104, PETRI_TRANSITIONS=74} [2024-11-13 13:58:49,043 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 51 predicate places. [2024-11-13 13:58:49,043 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 74 transitions, 529 flow [2024-11-13 13:58:49,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.571428571428571) internal successors, (306), 21 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:49,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:49,044 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:49,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 13:58:49,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 13:58:49,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:49,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash -202693442, now seen corresponding path program 1 times [2024-11-13 13:58:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:49,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783762469] [2024-11-13 13:58:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:49,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:49,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783762469] [2024-11-13 13:58:49,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783762469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:49,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:49,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:58:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706523147] [2024-11-13 13:58:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:49,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:49,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-13 13:58:49,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 74 transitions, 529 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) [2024-11-13 13:58:49,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:49,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-13 13:58:49,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:49,917 INFO L124 PetriNetUnfolderBase]: 2025/3361 cut-off events. [2024-11-13 13:58:49,917 INFO L125 PetriNetUnfolderBase]: For 11219/11271 co-relation queries the response was YES. [2024-11-13 13:58:49,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13643 conditions, 3361 events. 2025/3361 cut-off events. For 11219/11271 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19912 event pairs, 951 based on Foata normal form. 138/3434 useless extension candidates. Maximal degree in co-relation 6844. Up to 2227 conditions per place. [2024-11-13 13:58:49,947 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 79 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2024-11-13 13:58:49,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 863 flow [2024-11-13 13:58:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-13 13:58:49,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-13 13:58:49,949 INFO L175 Difference]: Start difference. First operand has 104 places, 74 transitions, 529 flow. Second operand 4 states and 98 transitions. [2024-11-13 13:58:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 863 flow [2024-11-13 13:58:49,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 765 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-11-13 13:58:49,974 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 464 flow [2024-11-13 13:58:49,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=464, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-11-13 13:58:49,975 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 43 predicate places. [2024-11-13 13:58:49,975 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 464 flow [2024-11-13 13:58:49,975 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) [2024-11-13 13:58:49,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:49,975 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:49,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 13:58:49,976 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:49,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash -189793446, now seen corresponding path program 1 times [2024-11-13 13:58:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:49,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446424661] [2024-11-13 13:58:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:49,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446424661] [2024-11-13 13:58:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446424661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:58:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:58:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:58:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740151485] [2024-11-13 13:58:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:58:50,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:58:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:58:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:58:50,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-13 13:58:50,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:50,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:50,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-13 13:58:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:50,613 INFO L124 PetriNetUnfolderBase]: 1799/2999 cut-off events. [2024-11-13 13:58:50,613 INFO L125 PetriNetUnfolderBase]: For 9770/9790 co-relation queries the response was YES. [2024-11-13 13:58:50,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11688 conditions, 2999 events. 1799/2999 cut-off events. For 9770/9790 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17417 event pairs, 921 based on Foata normal form. 126/3071 useless extension candidates. Maximal degree in co-relation 8772. Up to 1977 conditions per place. [2024-11-13 13:58:50,637 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 75 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-11-13 13:58:50,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 805 flow [2024-11-13 13:58:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:58:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:58:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-13 13:58:50,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-13 13:58:50,639 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 464 flow. Second operand 4 states and 97 transitions. [2024-11-13 13:58:50,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 805 flow [2024-11-13 13:58:50,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 773 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:58:50,663 INFO L231 Difference]: Finished difference. Result has 95 places, 68 transitions, 448 flow [2024-11-13 13:58:50,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=448, PETRI_PLACES=95, PETRI_TRANSITIONS=68} [2024-11-13 13:58:50,664 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 42 predicate places. [2024-11-13 13:58:50,664 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 68 transitions, 448 flow [2024-11-13 13:58:50,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:50,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:58:50,665 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:50,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 13:58:50,665 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-13 13:58:50,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:58:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash 958321921, now seen corresponding path program 1 times [2024-11-13 13:58:50,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:58:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548532567] [2024-11-13 13:58:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:58:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:51,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:58:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548532567] [2024-11-13 13:58:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548532567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:58:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676858309] [2024-11-13 13:58:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:58:51,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:58:51,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:58:51,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:58:51,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:58:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:58:51,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 13:58:51,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:58:51,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 13:58:51,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 13:58:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:58:51,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:58:51,961 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 120 treesize of output 116 [2024-11-13 13:58:51,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2024-11-13 13:58:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:58:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676858309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:58:52,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:58:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 7] total 18 [2024-11-13 13:58:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153011171] [2024-11-13 13:58:52,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:58:52,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:58:52,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:58:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:58:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:58:52,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-13 13:58:52,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 68 transitions, 448 flow. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:52,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:58:52,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-13 13:58:52,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:58:53,862 INFO L124 PetriNetUnfolderBase]: 2867/4657 cut-off events. [2024-11-13 13:58:53,863 INFO L125 PetriNetUnfolderBase]: For 13322/13383 co-relation queries the response was YES. [2024-11-13 13:58:53,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17466 conditions, 4657 events. 2867/4657 cut-off events. For 13322/13383 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26769 event pairs, 267 based on Foata normal form. 7/4640 useless extension candidates. Maximal degree in co-relation 12941. Up to 900 conditions per place. [2024-11-13 13:58:53,877 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 0 selfloop transitions, 0 changer transitions 266/266 dead transitions. [2024-11-13 13:58:53,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 266 transitions, 2236 flow [2024-11-13 13:58:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 13:58:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 13:58:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 433 transitions. [2024-11-13 13:58:53,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.433 [2024-11-13 13:58:53,881 INFO L175 Difference]: Start difference. First operand has 95 places, 68 transitions, 448 flow. Second operand 20 states and 433 transitions. [2024-11-13 13:58:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 266 transitions, 2236 flow [2024-11-13 13:58:53,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 266 transitions, 2166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:58:53,915 INFO L231 Difference]: Finished difference. Result has 109 places, 0 transitions, 0 flow [2024-11-13 13:58:53,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=0, PETRI_PLACES=109, PETRI_TRANSITIONS=0} [2024-11-13 13:58:53,916 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 56 predicate places. [2024-11-13 13:58:53,917 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 0 transitions, 0 flow [2024-11-13 13:58:53,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:58:53,920 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 27 remaining) [2024-11-13 13:58:53,921 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 27 remaining) [2024-11-13 13:58:53,921 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 27 remaining) [2024-11-13 13:58:53,921 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 27 remaining) [2024-11-13 13:58:53,922 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (12 of 27 remaining) [2024-11-13 13:58:53,923 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (11 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 27 remaining) [2024-11-13 13:58:53,924 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 27 remaining) [2024-11-13 13:58:53,925 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 27 remaining) [2024-11-13 13:58:53,925 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 27 remaining) [2024-11-13 13:58:53,925 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 27 remaining) [2024-11-13 13:58:53,925 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 27 remaining) [2024-11-13 13:58:53,925 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 27 remaining) [2024-11-13 13:58:53,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:58:54,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 13:58:54,130 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:58:54,137 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-13 13:58:54,138 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 13:58:54,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 01:58:54 BasicIcfg [2024-11-13 13:58:54,149 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 13:58:54,150 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 13:58:54,150 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 13:58:54,150 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 13:58:54,153 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:58:28" (3/4) ... [2024-11-13 13:58:54,155 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-13 13:58:54,159 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-13 13:58:54,159 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-13 13:58:54,159 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2024-11-13 13:58:54,169 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 91 nodes and edges [2024-11-13 13:58:54,170 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2024-11-13 13:58:54,170 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-13 13:58:54,171 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-13 13:58:54,283 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/witness.graphml [2024-11-13 13:58:54,284 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/witness.yml [2024-11-13 13:58:54,284 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 13:58:54,285 INFO L158 Benchmark]: Toolchain (without parser) took 27281.67ms. Allocated memory was 117.4MB in the beginning and 318.8MB in the end (delta: 201.3MB). Free memory was 92.0MB in the beginning and 189.7MB in the end (delta: -97.7MB). Peak memory consumption was 102.2MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,286 INFO L158 Benchmark]: CDTParser took 1.34ms. Allocated memory is still 117.4MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:58:54,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.11ms. Allocated memory is still 117.4MB. Free memory was 92.0MB in the beginning and 80.2MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,287 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.10ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 78.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,288 INFO L158 Benchmark]: Boogie Preprocessor took 48.62ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 77.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 13:58:54,289 INFO L158 Benchmark]: RCFGBuilder took 834.86ms. Allocated memory is still 117.4MB. Free memory was 77.0MB in the beginning and 91.8MB in the end (delta: -14.9MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,289 INFO L158 Benchmark]: TraceAbstraction took 25922.23ms. Allocated memory was 117.4MB in the beginning and 318.8MB in the end (delta: 201.3MB). Free memory was 91.3MB in the beginning and 197.0MB in the end (delta: -105.7MB). Peak memory consumption was 240.2MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,290 INFO L158 Benchmark]: Witness Printer took 134.27ms. Allocated memory is still 318.8MB. Free memory was 197.0MB in the beginning and 189.7MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 13:58:54,293 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.34ms. Allocated memory is still 117.4MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.11ms. Allocated memory is still 117.4MB. Free memory was 92.0MB in the beginning and 80.2MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.10ms. Allocated memory is still 117.4MB. Free memory was 80.2MB in the beginning and 78.5MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.62ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 77.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 834.86ms. Allocated memory is still 117.4MB. Free memory was 77.0MB in the beginning and 91.8MB in the end (delta: -14.9MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * TraceAbstraction took 25922.23ms. Allocated memory was 117.4MB in the beginning and 318.8MB in the end (delta: 201.3MB). Free memory was 91.3MB in the beginning and 197.0MB in the end (delta: -105.7MB). Peak memory consumption was 240.2MB. Max. memory is 16.1GB. * Witness Printer took 134.27ms. Allocated memory is still 318.8MB. Free memory was 197.0MB in the beginning and 189.7MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 73 locations, 27 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.8s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 14.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2148 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2006 mSDsluCounter, 1004 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 959 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6932 IncrementalHoareTripleChecker+Invalid, 6993 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 45 mSDtfsCounter, 6932 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=529occurred in iteration=13, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 351 NumberOfCodeBlocks, 341 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 452 ConstructedInterpolants, 1 QuantifiedInterpolants, 4710 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1040 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 64/137 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-13 13:58:54,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6575420a-081f-43f2-b294-d027d2f68ee6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE