./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.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_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/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_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/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_cfc390d4-9381-4e0e-9899-57673d8644f7/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:30:54,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:30:54,400 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 13:30:54,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:30:54,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:30:54,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:30:54,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:30:54,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:30:54,451 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:30:54,451 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:30:54,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:30:54,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:30:54,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:30:54,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:30:54,452 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:30:54,453 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:30:54,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:30:54,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:30:54,457 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:30:54,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:30:54,458 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:30:54,458 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:30:54,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:30:54,458 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_cfc390d4-9381-4e0e-9899-57673d8644f7/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 -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-13 13:30:54,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:30:54,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:30:54,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:30:54,913 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:30:54,914 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:30:54,916 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c Unable to find full path for "g++" [2024-11-13 13:30:57,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:30:57,699 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:30:57,700 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-13 13:30:57,709 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/data/0e6f87464/50afc83a26514b039c5bb0c56fbec051/FLAG82e48bd36 [2024-11-13 13:30:57,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/data/0e6f87464/50afc83a26514b039c5bb0c56fbec051 [2024-11-13 13:30:57,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:30:57,736 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:30:57,737 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:30:57,738 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:30:57,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:30:57,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:30:57" (1/1) ... [2024-11-13 13:30:57,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d2c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:57, skipping insertion in model container [2024-11-13 13:30:57,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:30:57" (1/1) ... [2024-11-13 13:30:57,777 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:30:58,061 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 13:30:58,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:30:58,087 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:30:58,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:30:58,144 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:30:58,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58 WrapperNode [2024-11-13 13:30:58,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:30:58,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:30:58,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:30:58,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:30:58,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,166 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,211 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 266 [2024-11-13 13:30:58,211 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:30:58,212 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:30:58,212 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:30:58,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:30:58,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,271 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 13:30:58,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,299 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,316 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:30:58,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:30:58,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:30:58,328 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:30:58,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (1/1) ... [2024-11-13 13:30:58,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:30:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:30:58,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:30:58,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:30:58,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:30:58,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 13:30:58,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:30:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:30:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:30:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 13:30:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 13:30:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:30:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:30:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:30:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:30:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:30:58,403 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 13:30:58,550 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:30:58,553 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:30:59,294 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:30:59,294 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:30:59,950 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:30:59,951 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-13 13:30:59,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:59 BoogieIcfgContainer [2024-11-13 13:30:59,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:30:59,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:30:59,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:30:59,963 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:30:59,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:30:57" (1/3) ... [2024-11-13 13:30:59,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219ee7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:59, skipping insertion in model container [2024-11-13 13:30:59,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:30:58" (2/3) ... [2024-11-13 13:30:59,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@219ee7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:30:59, skipping insertion in model container [2024-11-13 13:30:59,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:30:59" (3/3) ... [2024-11-13 13:30:59,968 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-13 13:30:59,992 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:30:59,994 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-dot-product.wvr.c that has 4 procedures, 69 locations, 1 initial locations, 8 loop locations, and 24 error locations. [2024-11-13 13:30:59,994 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:31:00,135 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 13:31:00,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-13 13:31:00,261 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-13 13:31:00,264 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 13:31:00,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 11/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 221 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-13 13:31:00,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-13 13:31:00,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-13 13:31:00,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:31:00,312 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;@78ad1c4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:31:00,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-13 13:31:00,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:31:00,320 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 13:31:00,320 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:31:00,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:00,322 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:31:00,323 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:00,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 869055, now seen corresponding path program 1 times [2024-11-13 13:31:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:00,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403925250] [2024-11-13 13:31:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:00,654 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 13:31:00,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:00,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403925250] [2024-11-13 13:31:00,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403925250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 13:31:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105897702] [2024-11-13 13:31:00,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:00,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:31:00,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:00,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:31:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:31:00,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:00,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 13:31:00,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:00,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:02,498 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-13 13:31:02,499 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-13 13:31:02,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 6952 events. 4704/6952 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39722 event pairs, 3616 based on Foata normal form. 544/5512 useless extension candidates. Maximal degree in co-relation 12988. Up to 6434 conditions per place. [2024-11-13 13:31:02,590 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-13 13:31:02,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-13 13:31:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:31:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:31:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-13 13:31:02,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-13 13:31:02,616 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-13 13:31:02,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-13 13:31:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:31:02,647 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-13 13:31:02,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-11-13 13:31:02,655 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-13 13:31:02,655 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-13 13:31:02,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 13:31:02,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:02,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:31:02,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:31:02,657 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:02,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash 869056, now seen corresponding path program 1 times [2024-11-13 13:31:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:02,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562707229] [2024-11-13 13:31:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:03,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:03,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562707229] [2024-11-13 13:31:03,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562707229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:31:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339927852] [2024-11-13 13:31:03,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:03,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:31:03,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:31:03,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:31:03,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:03,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:03,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:03,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:03,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:04,701 INFO L124 PetriNetUnfolderBase]: 4705/6955 cut-off events. [2024-11-13 13:31:04,701 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-13 13:31:04,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 6955 events. 4705/6955 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39718 event pairs, 3616 based on Foata normal form. 0/4969 useless extension candidates. Maximal degree in co-relation 13466. Up to 6443 conditions per place. [2024-11-13 13:31:04,767 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 48 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-13 13:31:04,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 256 flow [2024-11-13 13:31:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:31:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:31:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-13 13:31:04,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48417721518987344 [2024-11-13 13:31:04,769 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 153 transitions. [2024-11-13 13:31:04,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 256 flow [2024-11-13 13:31:04,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:31:04,774 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 169 flow [2024-11-13 13:31:04,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-11-13 13:31:04,776 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -5 predicate places. [2024-11-13 13:31:04,776 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 169 flow [2024-11-13 13:31:04,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:04,777 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:04,777 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 13:31:04,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:31:04,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:04,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash 26941625, now seen corresponding path program 1 times [2024-11-13 13:31:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:04,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739429166] [2024-11-13 13:31:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:05,219 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 13:31:05,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:05,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739429166] [2024-11-13 13:31:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739429166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:05,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:05,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212116226] [2024-11-13 13:31:05,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:05,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:31:05,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:31:05,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:31:05,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:05,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:05,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:05,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:05,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:06,411 INFO L124 PetriNetUnfolderBase]: 4706/6958 cut-off events. [2024-11-13 13:31:06,412 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-13 13:31:06,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13512 conditions, 6958 events. 4706/6958 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39679 event pairs, 3616 based on Foata normal form. 0/4971 useless extension candidates. Maximal degree in co-relation 13487. Up to 6442 conditions per place. [2024-11-13 13:31:06,464 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-13 13:31:06,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 285 flow [2024-11-13 13:31:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:31:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:31:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-11-13 13:31:06,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4582278481012658 [2024-11-13 13:31:06,469 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 169 flow. Second operand 5 states and 181 transitions. [2024-11-13 13:31:06,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 285 flow [2024-11-13 13:31:06,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:06,474 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 203 flow [2024-11-13 13:31:06,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-13 13:31:06,475 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-13 13:31:06,475 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 203 flow [2024-11-13 13:31:06,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:06,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:06,476 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 13:31:06,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:31:06,476 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:06,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash 835190997, now seen corresponding path program 1 times [2024-11-13 13:31:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:06,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072894031] [2024-11-13 13:31:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:06,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072894031] [2024-11-13 13:31:06,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072894031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925053381] [2024-11-13 13:31:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:06,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:06,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:31:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:07,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:31:07,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:07,167 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 13:31:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:07,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925053381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:07,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:31:07,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 13:31:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014337847] [2024-11-13 13:31:07,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:07,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:31:07,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:31:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:31:08,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:08,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 203 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 13:31:08,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:08,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:08,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:10,040 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-13 13:31:10,040 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-13 13:31:10,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 6957 events. 4706/6957 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39649 event pairs, 3616 based on Foata normal form. 0/4973 useless extension candidates. Maximal degree in co-relation 13497. Up to 6442 conditions per place. [2024-11-13 13:31:10,093 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-13 13:31:10,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 307 flow [2024-11-13 13:31:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:31:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:31:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2024-11-13 13:31:10,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42616033755274263 [2024-11-13 13:31:10,099 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 203 flow. Second operand 6 states and 202 transitions. [2024-11-13 13:31:10,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 307 flow [2024-11-13 13:31:10,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:10,104 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 212 flow [2024-11-13 13:31:10,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-13 13:31:10,105 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-13 13:31:10,105 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 212 flow [2024-11-13 13:31:10,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 13:31:10,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:10,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 13:31:10,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 13:31:10,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:10,312 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:10,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash 121125708, now seen corresponding path program 1 times [2024-11-13 13:31:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:10,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435976695] [2024-11-13 13:31:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:10,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:10,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435976695] [2024-11-13 13:31:10,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435976695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:10,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780010460] [2024-11-13 13:31:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:10,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:10,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:10,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:10,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:31:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:10,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:31:10,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:10,919 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 13:31:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:11,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780010460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:11,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:31:11,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 13:31:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049660281] [2024-11-13 13:31:11,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:11,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:31:11,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:31:11,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:31:12,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:12,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 212 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 13:31:12,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:12,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:12,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:13,752 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-13 13:31:13,753 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-13 13:31:13,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13529 conditions, 6956 events. 4706/6956 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39767 event pairs, 3616 based on Foata normal form. 0/4973 useless extension candidates. Maximal degree in co-relation 13496. Up to 6434 conditions per place. [2024-11-13 13:31:13,815 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-13 13:31:13,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 314 flow [2024-11-13 13:31:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:31:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:31:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-13 13:31:13,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-13 13:31:13,817 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 212 flow. Second operand 7 states and 229 transitions. [2024-11-13 13:31:13,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 314 flow [2024-11-13 13:31:13,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 280 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-13 13:31:13,823 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 198 flow [2024-11-13 13:31:13,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-13 13:31:13,824 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-13 13:31:13,824 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 198 flow [2024-11-13 13:31:13,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 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 13:31:13,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:13,826 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:13,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:31:14,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:14,028 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:14,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -536689747, now seen corresponding path program 1 times [2024-11-13 13:31:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:14,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38748090] [2024-11-13 13:31:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:14,149 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 13:31:14,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:14,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38748090] [2024-11-13 13:31:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38748090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:14,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:14,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:14,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67073549] [2024-11-13 13:31:14,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:14,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:31:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:31:14,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:31:14,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-13 13:31:14,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:14,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:14,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-13 13:31:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:14,978 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-13 13:31:14,978 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-13 13:31:14,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13538 conditions, 6960 events. 4706/6960 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39737 event pairs, 3616 based on Foata normal form. 1/4978 useless extension candidates. Maximal degree in co-relation 13480. Up to 6443 conditions per place. [2024-11-13 13:31:15,034 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-13 13:31:15,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 338 flow [2024-11-13 13:31:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:31:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:31:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-13 13:31:15,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4835443037974684 [2024-11-13 13:31:15,038 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 198 flow. Second operand 5 states and 191 transitions. [2024-11-13 13:31:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 338 flow [2024-11-13 13:31:15,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 303 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-13 13:31:15,044 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 181 flow [2024-11-13 13:31:15,044 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-11-13 13:31:15,045 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2024-11-13 13:31:15,045 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 181 flow [2024-11-13 13:31:15,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:15,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:15,045 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:15,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 13:31:15,048 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:15,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash 458649410, now seen corresponding path program 1 times [2024-11-13 13:31:15,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:15,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693096865] [2024-11-13 13:31:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:15,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:15,440 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 13:31:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693096865] [2024-11-13 13:31:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693096865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058116544] [2024-11-13 13:31:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:15,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:15,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:15,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:15,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:31:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:15,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:31:15,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:15,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:31:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:15,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 13:31:15,687 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:31:15,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:31:15,732 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 13:31:15,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:15,910 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 52 treesize of output 48 [2024-11-13 13:31:16,014 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 13:31:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058116544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:16,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:31:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-13 13:31:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642524104] [2024-11-13 13:31:16,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:16,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:31:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:31:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:31:20,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:24,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:28,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:32,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:36,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:40,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:31:40,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 79 [2024-11-13 13:31:40,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 10 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 13:31:40,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:40,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 79 [2024-11-13 13:31:40,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:42,779 INFO L124 PetriNetUnfolderBase]: 14428/20593 cut-off events. [2024-11-13 13:31:42,780 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-13 13:31:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40551 conditions, 20593 events. 14428/20593 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 125463 event pairs, 4797 based on Foata normal form. 0/14791 useless extension candidates. Maximal degree in co-relation 40542. Up to 8200 conditions per place. [2024-11-13 13:31:42,906 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 114 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2024-11-13 13:31:42,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 137 transitions, 567 flow [2024-11-13 13:31:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:31:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:31:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 290 transitions. [2024-11-13 13:31:42,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4078762306610408 [2024-11-13 13:31:42,909 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 181 flow. Second operand 9 states and 290 transitions. [2024-11-13 13:31:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 137 transitions, 567 flow [2024-11-13 13:31:42,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 137 transitions, 557 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-13 13:31:42,915 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 213 flow [2024-11-13 13:31:42,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=213, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-11-13 13:31:42,921 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2024-11-13 13:31:42,921 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 213 flow [2024-11-13 13:31:42,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 10 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 13:31:42,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:42,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:42,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:31:43,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 13:31:43,122 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:43,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash 458649409, now seen corresponding path program 1 times [2024-11-13 13:31:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245703244] [2024-11-13 13:31:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:43,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:43,266 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 13:31:43,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245703244] [2024-11-13 13:31:43,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245703244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:43,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:43,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707174680] [2024-11-13 13:31:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:43,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:31:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:31:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:31:43,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-13 13:31:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 13:31:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-13 13:31:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:44,705 INFO L124 PetriNetUnfolderBase]: 11413/15781 cut-off events. [2024-11-13 13:31:44,705 INFO L125 PetriNetUnfolderBase]: For 3200/3340 co-relation queries the response was YES. [2024-11-13 13:31:44,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 15781 events. 11413/15781 cut-off events. For 3200/3340 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 80510 event pairs, 8968 based on Foata normal form. 443/12540 useless extension candidates. Maximal degree in co-relation 33980. Up to 15520 conditions per place. [2024-11-13 13:31:44,816 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-13 13:31:44,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 67 transitions, 317 flow [2024-11-13 13:31:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:31:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:31:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-13 13:31:44,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-13 13:31:44,818 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 213 flow. Second operand 5 states and 136 transitions. [2024-11-13 13:31:44,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 67 transitions, 317 flow [2024-11-13 13:31:44,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:31:44,827 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 204 flow [2024-11-13 13:31:44,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-13 13:31:44,831 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-13 13:31:44,833 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 204 flow [2024-11-13 13:31:44,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 13:31:44,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:44,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:44,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 13:31:44,834 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:44,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1634611155, now seen corresponding path program 1 times [2024-11-13 13:31:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609324061] [2024-11-13 13:31:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:45,048 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 13:31:45,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:45,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609324061] [2024-11-13 13:31:45,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609324061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:45,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718143849] [2024-11-13 13:31:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:45,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:45,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:45,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:31:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:45,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:31:45,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:45,272 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 13:31:45,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:45,363 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 13:31:45,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718143849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:45,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:31:45,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 13:31:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125586041] [2024-11-13 13:31:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:45,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:31:45,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:31:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:31:45,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:31:45,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 204 flow. Second operand has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 13:31:45,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:45,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:31:45,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:47,132 INFO L124 PetriNetUnfolderBase]: 11738/16925 cut-off events. [2024-11-13 13:31:47,132 INFO L125 PetriNetUnfolderBase]: For 3707/3737 co-relation queries the response was YES. [2024-11-13 13:31:47,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36345 conditions, 16925 events. 11738/16925 cut-off events. For 3707/3737 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 101145 event pairs, 8408 based on Foata normal form. 0/12496 useless extension candidates. Maximal degree in co-relation 28424. Up to 12669 conditions per place. [2024-11-13 13:31:47,195 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 110 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-11-13 13:31:47,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 685 flow [2024-11-13 13:31:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:31:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:31:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 349 transitions. [2024-11-13 13:31:47,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4908579465541491 [2024-11-13 13:31:47,197 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 204 flow. Second operand 9 states and 349 transitions. [2024-11-13 13:31:47,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 685 flow [2024-11-13 13:31:47,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 138 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:31:47,203 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 325 flow [2024-11-13 13:31:47,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-11-13 13:31:47,204 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2024-11-13 13:31:47,204 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 325 flow [2024-11-13 13:31:47,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 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 13:31:47,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:47,205 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:47,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 13:31:47,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 13:31:47,409 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1334519449, now seen corresponding path program 1 times [2024-11-13 13:31:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:47,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558318807] [2024-11-13 13:31:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:47,511 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 13:31:47,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:47,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558318807] [2024-11-13 13:31:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558318807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:47,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:31:47,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400746139] [2024-11-13 13:31:47,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:47,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:31:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:31:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:31:47,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-13 13:31:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:47,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:47,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-13 13:31:47,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:48,653 INFO L124 PetriNetUnfolderBase]: 7958/11766 cut-off events. [2024-11-13 13:31:48,653 INFO L125 PetriNetUnfolderBase]: For 4719/4957 co-relation queries the response was YES. [2024-11-13 13:31:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26864 conditions, 11766 events. 7958/11766 cut-off events. For 4719/4957 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 70795 event pairs, 5983 based on Foata normal form. 0/9565 useless extension candidates. Maximal degree in co-relation 26825. Up to 10893 conditions per place. [2024-11-13 13:31:48,701 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 58 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-11-13 13:31:48,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 445 flow [2024-11-13 13:31:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:31:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:31:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-13 13:31:48,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4651898734177215 [2024-11-13 13:31:48,702 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 325 flow. Second operand 4 states and 147 transitions. [2024-11-13 13:31:48,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 445 flow [2024-11-13 13:31:48,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:31:48,707 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 327 flow [2024-11-13 13:31:48,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-11-13 13:31:48,708 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-11-13 13:31:48,708 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 327 flow [2024-11-13 13:31:48,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:31:48,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:48,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:48,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 13:31:48,709 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:48,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1334519450, now seen corresponding path program 1 times [2024-11-13 13:31:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142690138] [2024-11-13 13:31:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:48,870 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 13:31:48,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:48,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142690138] [2024-11-13 13:31:48,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142690138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:48,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:31:48,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:31:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465071556] [2024-11-13 13:31:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:48,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:31:48,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:31:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:31:49,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:31:49,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 13:31:49,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:49,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:31:49,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:50,704 INFO L124 PetriNetUnfolderBase]: 14485/21027 cut-off events. [2024-11-13 13:31:50,704 INFO L125 PetriNetUnfolderBase]: For 8786/9439 co-relation queries the response was YES. [2024-11-13 13:31:50,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48910 conditions, 21027 events. 14485/21027 cut-off events. For 8786/9439 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 130276 event pairs, 8526 based on Foata normal form. 0/17778 useless extension candidates. Maximal degree in co-relation 35106. Up to 12329 conditions per place. [2024-11-13 13:31:50,964 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 141 selfloop transitions, 12 changer transitions 0/164 dead transitions. [2024-11-13 13:31:50,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 164 transitions, 879 flow [2024-11-13 13:31:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:31:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:31:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 285 transitions. [2024-11-13 13:31:50,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6012658227848101 [2024-11-13 13:31:50,966 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 327 flow. Second operand 6 states and 285 transitions. [2024-11-13 13:31:50,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 164 transitions, 879 flow [2024-11-13 13:31:50,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 164 transitions, 873 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:31:50,979 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 397 flow [2024-11-13 13:31:50,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-11-13 13:31:50,979 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2024-11-13 13:31:50,979 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 397 flow [2024-11-13 13:31:50,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 13:31:50,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:50,980 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:50,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 13:31:50,980 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:50,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1783343426, now seen corresponding path program 2 times [2024-11-13 13:31:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481085745] [2024-11-13 13:31:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:31:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:51,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481085745] [2024-11-13 13:31:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481085745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:51,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407184936] [2024-11-13 13:31:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:31:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:51,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:31:51,433 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 13:31:51,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:31:51,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 13:31:51,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:51,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:31:51,471 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 13:31:51,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:51,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 13:31:51,617 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:31:51,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:31:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:31:51,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407184936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:51,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 13:31:51,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-13 13:31:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742523265] [2024-11-13 13:31:51,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:51,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 13:31:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 13:31:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:31:52,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 79 [2024-11-13 13:31:52,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:31:52,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:52,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 79 [2024-11-13 13:31:52,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:54,461 INFO L124 PetriNetUnfolderBase]: 14681/20963 cut-off events. [2024-11-13 13:31:54,462 INFO L125 PetriNetUnfolderBase]: For 19015/19749 co-relation queries the response was YES. [2024-11-13 13:31:54,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54719 conditions, 20963 events. 14681/20963 cut-off events. For 19015/19749 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 127925 event pairs, 2496 based on Foata normal form. 410/17817 useless extension candidates. Maximal degree in co-relation 41381. Up to 11122 conditions per place. [2024-11-13 13:31:54,609 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 117 selfloop transitions, 13 changer transitions 0/139 dead transitions. [2024-11-13 13:31:54,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 909 flow [2024-11-13 13:31:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:31:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:31:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 239 transitions. [2024-11-13 13:31:54,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4321880650994575 [2024-11-13 13:31:54,611 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 397 flow. Second operand 7 states and 239 transitions. [2024-11-13 13:31:54,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 909 flow [2024-11-13 13:31:54,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 139 transitions, 899 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:31:54,635 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 409 flow [2024-11-13 13:31:54,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-11-13 13:31:54,636 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-11-13 13:31:54,636 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 409 flow [2024-11-13 13:31:54,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 13:31:54,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:54,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:54,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 13:31:54,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 13:31:54,841 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:54,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:54,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1019325476, now seen corresponding path program 1 times [2024-11-13 13:31:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546269946] [2024-11-13 13:31:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:54,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:55,256 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 13:31:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:55,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546269946] [2024-11-13 13:31:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546269946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:55,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901844480] [2024-11-13 13:31:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:55,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:55,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:55,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:31:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:55,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 13:31:55,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:55,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:31:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:31:55,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 13:31:55,492 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:31:55,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:31:55,602 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 13:31:55,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 13:31:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901844480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:31:55,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 13:31:55,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-13 13:31:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636789546] [2024-11-13 13:31:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:31:55,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 13:31:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 13:31:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:31:55,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 79 [2024-11-13 13:31:55,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 13:31:55,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:55,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 79 [2024-11-13 13:31:55,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:31:58,760 INFO L124 PetriNetUnfolderBase]: 24233/35337 cut-off events. [2024-11-13 13:31:58,760 INFO L125 PetriNetUnfolderBase]: For 39871/41450 co-relation queries the response was YES. [2024-11-13 13:31:58,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93982 conditions, 35337 events. 24233/35337 cut-off events. For 39871/41450 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 238401 event pairs, 11630 based on Foata normal form. 1112/30718 useless extension candidates. Maximal degree in co-relation 67190. Up to 21328 conditions per place. [2024-11-13 13:31:58,957 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 99 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-11-13 13:31:58,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 795 flow [2024-11-13 13:31:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:31:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:31:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-11-13 13:31:58,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45358649789029537 [2024-11-13 13:31:58,959 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 409 flow. Second operand 6 states and 215 transitions. [2024-11-13 13:31:58,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 795 flow [2024-11-13 13:31:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 759 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:31:59,023 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 418 flow [2024-11-13 13:31:59,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2024-11-13 13:31:59,024 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 17 predicate places. [2024-11-13 13:31:59,024 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 418 flow [2024-11-13 13:31:59,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 0 states have call successors, (0), 0 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 13:31:59,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:31:59,024 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:31:59,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:31:59,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 13:31:59,225 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:31:59,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:31:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1722035366, now seen corresponding path program 1 times [2024-11-13 13:31:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:31:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415911925] [2024-11-13 13:31:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:31:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:59,363 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 13:31:59,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:31:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415911925] [2024-11-13 13:31:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415911925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:31:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080990539] [2024-11-13 13:31:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:31:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:31:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:31:59,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:31:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:31:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:31:59,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:31:59,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:31:59,569 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 13:31:59,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:31:59,654 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 13:31:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080990539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:31:59,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:31:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 13:31:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692546593] [2024-11-13 13:31:59,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:31:59,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 13:31:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:31:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 13:31:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:31:59,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:31:59,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 418 flow. Second operand has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 13:31:59,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:31:59,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:31:59,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:32:03,798 INFO L124 PetriNetUnfolderBase]: 22893/34137 cut-off events. [2024-11-13 13:32:03,798 INFO L125 PetriNetUnfolderBase]: For 25609/26815 co-relation queries the response was YES. [2024-11-13 13:32:03,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87495 conditions, 34137 events. 22893/34137 cut-off events. For 25609/26815 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 232299 event pairs, 15372 based on Foata normal form. 608/29767 useless extension candidates. Maximal degree in co-relation 70130. Up to 25556 conditions per place. [2024-11-13 13:32:04,221 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 123 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-11-13 13:32:04,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 951 flow [2024-11-13 13:32:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:32:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:32:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 354 transitions. [2024-11-13 13:32:04,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4978902953586498 [2024-11-13 13:32:04,224 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 418 flow. Second operand 9 states and 354 transitions. [2024-11-13 13:32:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 951 flow [2024-11-13 13:32:04,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 152 transitions, 925 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:32:04,269 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 499 flow [2024-11-13 13:32:04,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=499, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-11-13 13:32:04,269 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2024-11-13 13:32:04,270 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 499 flow [2024-11-13 13:32:04,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 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 13:32:04,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:32:04,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:04,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:32:04,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 13:32:04,474 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:32:04,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1657804755, now seen corresponding path program 1 times [2024-11-13 13:32:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:32:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697299573] [2024-11-13 13:32:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:32:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:32:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:32:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697299573] [2024-11-13 13:32:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697299573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:32:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938293060] [2024-11-13 13:32:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:04,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:04,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:32:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:04,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 13:32:04,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:04,930 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 23 treesize of output 7 [2024-11-13 13:32:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:32:04,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:05,005 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 25 treesize of output 9 [2024-11-13 13:32:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 13:32:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938293060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:05,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:32:05,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-13 13:32:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143265582] [2024-11-13 13:32:05,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:05,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 13:32:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:32:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 13:32:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:32:05,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:32:05,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 499 flow. Second operand has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 13:32:05,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:32:05,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:32:05,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:32:12,768 INFO L124 PetriNetUnfolderBase]: 40072/56892 cut-off events. [2024-11-13 13:32:12,768 INFO L125 PetriNetUnfolderBase]: For 53650/57465 co-relation queries the response was YES. [2024-11-13 13:32:12,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153108 conditions, 56892 events. 40072/56892 cut-off events. For 53650/57465 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 374017 event pairs, 16425 based on Foata normal form. 0/48391 useless extension candidates. Maximal degree in co-relation 121849. Up to 19623 conditions per place. [2024-11-13 13:32:13,099 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 266 selfloop transitions, 43 changer transitions 0/318 dead transitions. [2024-11-13 13:32:13,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 318 transitions, 1950 flow [2024-11-13 13:32:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 13:32:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-13 13:32:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 660 transitions. [2024-11-13 13:32:13,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5221518987341772 [2024-11-13 13:32:13,102 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 499 flow. Second operand 16 states and 660 transitions. [2024-11-13 13:32:13,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 318 transitions, 1950 flow [2024-11-13 13:32:13,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 318 transitions, 1914 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 13:32:13,628 INFO L231 Difference]: Finished difference. Result has 112 places, 103 transitions, 748 flow [2024-11-13 13:32:13,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=748, PETRI_PLACES=112, PETRI_TRANSITIONS=103} [2024-11-13 13:32:13,629 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2024-11-13 13:32:13,629 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 103 transitions, 748 flow [2024-11-13 13:32:13,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 13:32:13,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:32:13,629 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:13,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 13:32:13,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 13:32:13,830 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:32:13,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1160515957, now seen corresponding path program 1 times [2024-11-13 13:32:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:32:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117328467] [2024-11-13 13:32:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:32:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:32:13,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:32:13,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117328467] [2024-11-13 13:32:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117328467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:32:13,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:32:13,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:32:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159155617] [2024-11-13 13:32:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:32:13,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:32:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:32:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:32:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:32:14,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:32:14,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 103 transitions, 748 flow. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 13:32:14,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:32:14,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:32:14,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:32:19,820 INFO L124 PetriNetUnfolderBase]: 34834/50894 cut-off events. [2024-11-13 13:32:19,820 INFO L125 PetriNetUnfolderBase]: For 89066/92249 co-relation queries the response was YES. [2024-11-13 13:32:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149488 conditions, 50894 events. 34834/50894 cut-off events. For 89066/92249 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 347802 event pairs, 24702 based on Foata normal form. 978/45313 useless extension candidates. Maximal degree in co-relation 119777. Up to 39550 conditions per place. [2024-11-13 13:32:20,185 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 163 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2024-11-13 13:32:20,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 184 transitions, 1464 flow [2024-11-13 13:32:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:32:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:32:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 271 transitions. [2024-11-13 13:32:20,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5717299578059072 [2024-11-13 13:32:20,187 INFO L175 Difference]: Start difference. First operand has 112 places, 103 transitions, 748 flow. Second operand 6 states and 271 transitions. [2024-11-13 13:32:20,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 184 transitions, 1464 flow [2024-11-13 13:32:20,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 184 transitions, 1384 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-13 13:32:20,503 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 744 flow [2024-11-13 13:32:20,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=744, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-13 13:32:20,504 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2024-11-13 13:32:20,504 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 744 flow [2024-11-13 13:32:20,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 13:32:20,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:32:20,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:20,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 13:32:20,505 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:32:20,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1307421274, now seen corresponding path program 1 times [2024-11-13 13:32:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:32:20,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469405164] [2024-11-13 13:32:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:32:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:20,639 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 13:32:20,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:32:20,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469405164] [2024-11-13 13:32:20,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469405164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:32:20,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:32:20,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 13:32:20,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971643323] [2024-11-13 13:32:20,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:32:20,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:32:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:32:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:32:20,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 13:32:20,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:32:20,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 744 flow. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 13:32:20,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:32:20,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:32:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:32:27,125 INFO L124 PetriNetUnfolderBase]: 33345/48295 cut-off events. [2024-11-13 13:32:27,125 INFO L125 PetriNetUnfolderBase]: For 72461/75462 co-relation queries the response was YES. [2024-11-13 13:32:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144247 conditions, 48295 events. 33345/48295 cut-off events. For 72461/75462 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 321665 event pairs, 23848 based on Foata normal form. 939/43194 useless extension candidates. Maximal degree in co-relation 114826. Up to 40546 conditions per place. [2024-11-13 13:32:27,477 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 156 selfloop transitions, 11 changer transitions 0/179 dead transitions. [2024-11-13 13:32:27,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 179 transitions, 1492 flow [2024-11-13 13:32:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:32:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:32:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2024-11-13 13:32:27,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5421940928270043 [2024-11-13 13:32:27,479 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 744 flow. Second operand 6 states and 257 transitions. [2024-11-13 13:32:27,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 179 transitions, 1492 flow [2024-11-13 13:32:27,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 179 transitions, 1482 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:32:27,811 INFO L231 Difference]: Finished difference. Result has 118 places, 112 transitions, 794 flow [2024-11-13 13:32:27,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=794, PETRI_PLACES=118, PETRI_TRANSITIONS=112} [2024-11-13 13:32:27,812 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 44 predicate places. [2024-11-13 13:32:27,812 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 112 transitions, 794 flow [2024-11-13 13:32:27,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 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 13:32:27,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:32:27,813 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:27,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 13:32:27,813 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:32:27,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1773200933, now seen corresponding path program 2 times [2024-11-13 13:32:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:32:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030863187] [2024-11-13 13:32:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:32:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:32:28,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:32:28,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030863187] [2024-11-13 13:32:28,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030863187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:32:28,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39430163] [2024-11-13 13:32:28,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:32:28,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:28,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:28,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:28,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:32:28,141 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:32:28,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:32:28,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 13:32:28,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:28,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 13:32:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:32:28,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 13:32:28,218 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:32:28,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 13:32:28,292 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 13:32:28,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:28,460 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 52 treesize of output 48 [2024-11-13 13:32:28,607 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 13:32:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39430163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:28,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:32:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-13 13:32:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515018191] [2024-11-13 13:32:28,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:28,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 13:32:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:32:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 13:32:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:32:32,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:32:37,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:32:41,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:32:41,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 79 [2024-11-13 13:32:41,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 112 transitions, 794 flow. Second operand has 16 states, 16 states have (on average 21.0625) internal successors, (337), 16 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 13:32:41,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:32:41,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 79 [2024-11-13 13:32:41,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:32:50,816 INFO L124 PetriNetUnfolderBase]: 52256/73150 cut-off events. [2024-11-13 13:32:50,817 INFO L125 PetriNetUnfolderBase]: For 82453/86487 co-relation queries the response was YES. [2024-11-13 13:32:51,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227775 conditions, 73150 events. 52256/73150 cut-off events. For 82453/86487 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 480454 event pairs, 7554 based on Foata normal form. 1166/64801 useless extension candidates. Maximal degree in co-relation 194860. Up to 17504 conditions per place. [2024-11-13 13:32:51,359 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 255 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-11-13 13:32:51,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 304 transitions, 2241 flow [2024-11-13 13:32:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 13:32:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 13:32:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 454 transitions. [2024-11-13 13:32:51,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44206426484907496 [2024-11-13 13:32:51,361 INFO L175 Difference]: Start difference. First operand has 118 places, 112 transitions, 794 flow. Second operand 13 states and 454 transitions. [2024-11-13 13:32:51,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 304 transitions, 2241 flow [2024-11-13 13:32:52,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 304 transitions, 2231 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:32:52,648 INFO L231 Difference]: Finished difference. Result has 131 places, 123 transitions, 1003 flow [2024-11-13 13:32:52,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1003, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2024-11-13 13:32:52,649 INFO L277 CegarLoopForPetriNet]: 74 programPoint places, 57 predicate places. [2024-11-13 13:32:52,649 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 1003 flow [2024-11-13 13:32:52,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 21.0625) internal successors, (337), 16 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 13:32:52,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:32:52,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:32:52,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:32:52,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 13:32:52,851 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-13 13:32:52,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:32:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1993577638, now seen corresponding path program 1 times [2024-11-13 13:32:52,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:32:52,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226392509] [2024-11-13 13:32:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:32:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:53,002 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 13:32:53,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:32:53,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226392509] [2024-11-13 13:32:53,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226392509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:32:53,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186214515] [2024-11-13 13:32:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:32:53,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:32:53,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:32:53,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:32:53,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfc390d4-9381-4e0e-9899-57673d8644f7/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:32:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:32:53,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 13:32:53,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:32:53,258 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 13:32:53,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:32:53,349 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 13:32:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186214515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:32:53,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:32:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 13:32:53,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919077373] [2024-11-13 13:32:53,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:32:53,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 13:32:53,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:32:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 13:32:53,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:32:53,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-13 13:32:53,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 1003 flow. Second operand has 15 states, 15 states have (on average 28.4) internal successors, (426), 15 states have internal predecessors, (426), 0 states have call successors, (0), 0 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 13:32:53,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:32:53,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-13 13:32:53,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand