./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.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_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/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_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/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_b398055b-401a-4013-9f17-05490ace48f6/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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 14:23:09,286 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 14:23:09,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 14:23:09,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 14:23:09,365 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 14:23:09,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 14:23:09,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 14:23:09,390 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 14:23:09,390 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 14:23:09,390 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 14:23:09,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 14:23:09,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 14:23:09,391 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 14:23:09,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 14:23:09,391 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 14:23:09,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 14:23:09,392 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 14:23:09,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 14:23:09,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 14:23:09,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 14:23:09,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 14:23:09,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 14:23:09,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:23:09,394 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 14:23:09,395 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 14:23:09,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 14:23:09,396 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_b398055b-401a-4013-9f17-05490ace48f6/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 -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-13 14:23:09,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 14:23:09,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 14:23:09,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 14:23:09,734 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 14:23:09,734 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 14:23:09,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c Unable to find full path for "g++" [2024-11-13 14:23:11,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 14:23:11,798 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 14:23:11,800 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-13 14:23:11,811 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/data/f1997e7f1/76fea2729d944c1a8f183cfacf2b194c/FLAG6c2e7c397 [2024-11-13 14:23:11,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/data/f1997e7f1/76fea2729d944c1a8f183cfacf2b194c [2024-11-13 14:23:11,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 14:23:11,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 14:23:11,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 14:23:11,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 14:23:11,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 14:23:11,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:23:11" (1/1) ... [2024-11-13 14:23:11,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43daa4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:11, skipping insertion in model container [2024-11-13 14:23:11,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:23:11" (1/1) ... [2024-11-13 14:23:11,855 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 14:23:12,089 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 14:23:12,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:23:12,106 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 14:23:12,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 14:23:12,171 INFO L204 MainTranslator]: Completed translation [2024-11-13 14:23:12,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12 WrapperNode [2024-11-13 14:23:12,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 14:23:12,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 14:23:12,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 14:23:12,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 14:23:12,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,194 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,226 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 109 [2024-11-13 14:23:12,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 14:23:12,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 14:23:12,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 14:23:12,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 14:23:12,238 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,241 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,268 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-13 14:23:12,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,269 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 14:23:12,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 14:23:12,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 14:23:12,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 14:23:12,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (1/1) ... [2024-11-13 14:23:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 14:23:12,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:12,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 14:23:12,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 14:23:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 14:23:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 14:23:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 14:23:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 14:23:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 14:23:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 14:23:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 14:23:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 14:23:12,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 14:23:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 14:23:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 14:23:12,355 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 14:23:12,472 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 14:23:12,473 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 14:23:12,887 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 14:23:12,887 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 14:23:13,199 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 14:23:13,199 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-13 14:23:13,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:23:13 BoogieIcfgContainer [2024-11-13 14:23:13,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 14:23:13,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 14:23:13,202 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 14:23:13,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 14:23:13,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:23:11" (1/3) ... [2024-11-13 14:23:13,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb394f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:23:13, skipping insertion in model container [2024-11-13 14:23:13,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:23:12" (2/3) ... [2024-11-13 14:23:13,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb394f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:23:13, skipping insertion in model container [2024-11-13 14:23:13,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:23:13" (3/3) ... [2024-11-13 14:23:13,211 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-13 14:23:13,226 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 14:23:13,228 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-array-sum.wvr.c that has 4 procedures, 52 locations, 1 initial locations, 5 loop locations, and 14 error locations. [2024-11-13 14:23:13,228 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 14:23:13,316 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 14:23:13,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2024-11-13 14:23:13,410 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-13 14:23:13,412 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 14:23:13,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 125 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2024-11-13 14:23:13,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2024-11-13 14:23:13,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2024-11-13 14:23:13,428 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 14:23:13,440 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;@63a70f27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 14:23:13,440 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-13 14:23:13,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 14:23:13,444 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 14:23:13,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 14:23:13,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:13,445 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:23:13,445 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:13,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 491746, now seen corresponding path program 1 times [2024-11-13 14:23:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593431313] [2024-11-13 14:23:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:13,730 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 14:23:13,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:13,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593431313] [2024-11-13 14:23:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593431313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:13,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 14:23:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71663492] [2024-11-13 14:23:13,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:13,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 14:23:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 14:23:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 14:23:13,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:13,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:13,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:13,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:13,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:14,426 INFO L124 PetriNetUnfolderBase]: 2001/3128 cut-off events. [2024-11-13 14:23:14,426 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-13 14:23:14,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 3128 events. 2001/3128 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18480 event pairs, 1627 based on Foata normal form. 1/2094 useless extension candidates. Maximal degree in co-relation 5677. Up to 2795 conditions per place. [2024-11-13 14:23:14,491 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 36 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-13 14:23:14,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 192 flow [2024-11-13 14:23:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 14:23:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 14:23:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-13 14:23:14,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-11-13 14:23:14,506 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 86 transitions. [2024-11-13 14:23:14,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 192 flow [2024-11-13 14:23:14,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 14:23:14,528 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2024-11-13 14:23:14,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-13 14:23:14,534 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2024-11-13 14:23:14,534 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2024-11-13 14:23:14,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:14,535 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:14,535 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 14:23:14,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 14:23:14,535 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:14,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 491747, now seen corresponding path program 1 times [2024-11-13 14:23:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571993726] [2024-11-13 14:23:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:15,017 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 14:23:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571993726] [2024-11-13 14:23:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571993726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:15,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:15,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 14:23:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296485906] [2024-11-13 14:23:15,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:15,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:23:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:23:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:23:15,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:15,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:15,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:15,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:15,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:15,610 INFO L124 PetriNetUnfolderBase]: 2002/3131 cut-off events. [2024-11-13 14:23:15,611 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-13 14:23:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6002 conditions, 3131 events. 2002/3131 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18491 event pairs, 1627 based on Foata normal form. 0/2094 useless extension candidates. Maximal degree in co-relation 5973. Up to 2804 conditions per place. [2024-11-13 14:23:15,636 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-11-13 14:23:15,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 200 flow [2024-11-13 14:23:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:23:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:23:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-13 14:23:15,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-13 14:23:15,639 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-11-13 14:23:15,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 200 flow [2024-11-13 14:23:15,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:23:15,642 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2024-11-13 14:23:15,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-11-13 14:23:15,643 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2024-11-13 14:23:15,643 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2024-11-13 14:23:15,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:15,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:15,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 14:23:15,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 14:23:15,643 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:15,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 15244759, now seen corresponding path program 1 times [2024-11-13 14:23:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:15,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873487815] [2024-11-13 14:23:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:15,860 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 14:23:15,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873487815] [2024-11-13 14:23:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873487815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:15,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:15,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:23:15,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100784889] [2024-11-13 14:23:15,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:15,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:23:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:23:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:23:15,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:15,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:15,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:15,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:16,403 INFO L124 PetriNetUnfolderBase]: 2003/3136 cut-off events. [2024-11-13 14:23:16,403 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-13 14:23:16,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6020 conditions, 3136 events. 2003/3136 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18564 event pairs, 1627 based on Foata normal form. 0/2100 useless extension candidates. Maximal degree in co-relation 5982. Up to 2803 conditions per place. [2024-11-13 14:23:16,429 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-11-13 14:23:16,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 229 flow [2024-11-13 14:23:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:23:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:23:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-13 14:23:16,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 14:23:16,433 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 114 transitions. [2024-11-13 14:23:16,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 229 flow [2024-11-13 14:23:16,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 14:23:16,436 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2024-11-13 14:23:16,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-13 14:23:16,438 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-11-13 14:23:16,438 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2024-11-13 14:23:16,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:16,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:16,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 14:23:16,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 14:23:16,439 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:16,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:16,439 INFO L85 PathProgramCache]: Analyzing trace with hash 472584919, now seen corresponding path program 1 times [2024-11-13 14:23:16,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:16,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799488659] [2024-11-13 14:23:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:16,821 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 14:23:16,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:16,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799488659] [2024-11-13 14:23:16,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799488659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:16,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75759992] [2024-11-13 14:23:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:16,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:16,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:16,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 14:23:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:16,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 14:23:16,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:16,985 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 14:23:17,290 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 14:23:17,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:17,464 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 14:23:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75759992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:17,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:17,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 14:23:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851143701] [2024-11-13 14:23:17,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:17,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:23:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:23:17,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:23:17,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:17,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:17,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:17,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:17,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:18,128 INFO L124 PetriNetUnfolderBase]: 2003/3135 cut-off events. [2024-11-13 14:23:18,128 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-13 14:23:18,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6036 conditions, 3135 events. 2003/3135 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18537 event pairs, 1627 based on Foata normal form. 0/2102 useless extension candidates. Maximal degree in co-relation 5986. Up to 2805 conditions per place. [2024-11-13 14:23:18,152 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-11-13 14:23:18,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 248 flow [2024-11-13 14:23:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-13 14:23:18,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-13 14:23:18,154 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 6 states and 133 transitions. [2024-11-13 14:23:18,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 248 flow [2024-11-13 14:23:18,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-13 14:23:18,156 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 172 flow [2024-11-13 14:23:18,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-11-13 14:23:18,156 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-11-13 14:23:18,156 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 172 flow [2024-11-13 14:23:18,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:18,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:18,157 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 14:23:18,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 14:23:18,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:18,361 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:18,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1765231203, now seen corresponding path program 1 times [2024-11-13 14:23:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615888495] [2024-11-13 14:23:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:18,667 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 14:23:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:18,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615888495] [2024-11-13 14:23:18,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615888495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:18,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503838856] [2024-11-13 14:23:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:18,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:18,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 14:23:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:18,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 14:23:18,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:18,791 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 14:23:18,970 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 14:23:18,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-13 14:23:19,003 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 14:23:19,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:19,110 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 14:23:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503838856] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:19,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:23:19,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-13 14:23:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749326411] [2024-11-13 14:23:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:19,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:19,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 14:23:19,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:19,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:19,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:19,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:19,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:19,891 INFO L124 PetriNetUnfolderBase]: 4001/6229 cut-off events. [2024-11-13 14:23:19,891 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 14:23:19,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11991 conditions, 6229 events. 4001/6229 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 40691 event pairs, 3254 based on Foata normal form. 1/4184 useless extension candidates. Maximal degree in co-relation 5988. Up to 2802 conditions per place. [2024-11-13 14:23:19,938 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-13 14:23:19,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 398 flow [2024-11-13 14:23:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:23:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:23:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-13 14:23:19,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2024-11-13 14:23:19,942 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 172 flow. Second operand 5 states and 153 transitions. [2024-11-13 14:23:19,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 398 flow [2024-11-13 14:23:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 368 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-13 14:23:19,946 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 159 flow [2024-11-13 14:23:19,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-11-13 14:23:19,947 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2024-11-13 14:23:19,949 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 159 flow [2024-11-13 14:23:19,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:19,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:19,949 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:19,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 14:23:20,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:20,158 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:20,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1107043157, now seen corresponding path program 1 times [2024-11-13 14:23:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:20,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498651590] [2024-11-13 14:23:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:20,266 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 14:23:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498651590] [2024-11-13 14:23:20,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498651590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:20,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:20,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:23:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333654656] [2024-11-13 14:23:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:20,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:20,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:23:20,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:23:20,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:20,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:23:20,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:21,029 INFO L124 PetriNetUnfolderBase]: 4161/6527 cut-off events. [2024-11-13 14:23:21,029 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-13 14:23:21,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 6527 events. 4161/6527 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41856 event pairs, 2949 based on Foata normal form. 0/4537 useless extension candidates. Maximal degree in co-relation 6891. Up to 3237 conditions per place. [2024-11-13 14:23:21,065 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 84 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2024-11-13 14:23:21,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 451 flow [2024-11-13 14:23:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-13 14:23:21,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-13 14:23:21,070 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 159 flow. Second operand 6 states and 190 transitions. [2024-11-13 14:23:21,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 451 flow [2024-11-13 14:23:21,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 436 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 14:23:21,075 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 178 flow [2024-11-13 14:23:21,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-13 14:23:21,076 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2024-11-13 14:23:21,076 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 178 flow [2024-11-13 14:23:21,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:23:21,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:21,076 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:21,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 14:23:21,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:21,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:21,077 INFO L85 PathProgramCache]: Analyzing trace with hash -124880045, now seen corresponding path program 1 times [2024-11-13 14:23:21,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:21,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680800020] [2024-11-13 14:23:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:21,249 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 14:23:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:21,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680800020] [2024-11-13 14:23:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680800020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:21,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597310099] [2024-11-13 14:23:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:21,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:21,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:21,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 14:23:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:21,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 14:23:21,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:21,416 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 14:23:21,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:21,510 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 14:23:21,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597310099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:21,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-13 14:23:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061706027] [2024-11-13 14:23:21,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:21,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 14:23:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 14:23:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-13 14:23:21,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:21,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 14:23:21,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:21,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:21,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:22,593 INFO L124 PetriNetUnfolderBase]: 4902/7675 cut-off events. [2024-11-13 14:23:22,593 INFO L125 PetriNetUnfolderBase]: For 1254/1387 co-relation queries the response was YES. [2024-11-13 14:23:22,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 7675 events. 4902/7675 cut-off events. For 1254/1387 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50254 event pairs, 4053 based on Foata normal form. 1/5326 useless extension candidates. Maximal degree in co-relation 6228. Up to 4155 conditions per place. [2024-11-13 14:23:22,638 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 70 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-11-13 14:23:22,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 479 flow [2024-11-13 14:23:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 14:23:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 14:23:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-11-13 14:23:22,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-11-13 14:23:22,640 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 178 flow. Second operand 9 states and 240 transitions. [2024-11-13 14:23:22,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 479 flow [2024-11-13 14:23:22,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 462 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:22,645 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 260 flow [2024-11-13 14:23:22,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-11-13 14:23:22,646 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-11-13 14:23:22,646 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 260 flow [2024-11-13 14:23:22,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 14:23:22,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:22,647 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:22,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 14:23:22,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:22,851 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:22,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1250247338, now seen corresponding path program 1 times [2024-11-13 14:23:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:22,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475287227] [2024-11-13 14:23:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:22,933 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 14:23:22,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:22,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475287227] [2024-11-13 14:23:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475287227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:22,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 14:23:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898707107] [2024-11-13 14:23:22,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:22,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:22,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:22,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:23:22,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:23:22,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:22,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:23:22,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:23,636 INFO L124 PetriNetUnfolderBase]: 4680/7204 cut-off events. [2024-11-13 14:23:23,636 INFO L125 PetriNetUnfolderBase]: For 922/1200 co-relation queries the response was YES. [2024-11-13 14:23:23,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14817 conditions, 7204 events. 4680/7204 cut-off events. For 922/1200 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45054 event pairs, 3780 based on Foata normal form. 0/4999 useless extension candidates. Maximal degree in co-relation 6844. Up to 6213 conditions per place. [2024-11-13 14:23:23,680 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 75 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-11-13 14:23:23,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 518 flow [2024-11-13 14:23:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-11-13 14:23:23,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2024-11-13 14:23:23,682 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 260 flow. Second operand 6 states and 175 transitions. [2024-11-13 14:23:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 518 flow [2024-11-13 14:23:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 486 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:23,685 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 269 flow [2024-11-13 14:23:23,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2024-11-13 14:23:23,686 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-11-13 14:23:23,686 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 269 flow [2024-11-13 14:23:23,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:23:23,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:23,687 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-13 14:23:23,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 14:23:23,687 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:23,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash 157024735, now seen corresponding path program 2 times [2024-11-13 14:23:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:23,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147067059] [2024-11-13 14:23:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:24,078 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 14:23:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147067059] [2024-11-13 14:23:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147067059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634547404] [2024-11-13 14:23:24,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:23:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:24,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:24,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 14:23:24,168 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:23:24,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:23:24,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:23:24,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:24,196 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 14:23:24,364 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 14:23:24,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-13 14:23:24,471 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 14:23:24,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:23:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634547404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:24,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:24,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-13 14:23:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616679376] [2024-11-13 14:23:24,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:24,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:23:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:23:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:23:25,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 269 flow. Second operand has 19 states, 19 states have (on average 16.57894736842105) internal successors, (315), 19 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 14:23:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:25,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:25,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:26,446 INFO L124 PetriNetUnfolderBase]: 4240/6664 cut-off events. [2024-11-13 14:23:26,446 INFO L125 PetriNetUnfolderBase]: For 1377/1693 co-relation queries the response was YES. [2024-11-13 14:23:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14275 conditions, 6664 events. 4240/6664 cut-off events. For 1377/1693 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 43401 event pairs, 3495 based on Foata normal form. 6/4764 useless extension candidates. Maximal degree in co-relation 6473. Up to 3218 conditions per place. [2024-11-13 14:23:26,479 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 81 selfloop transitions, 19 changer transitions 0/109 dead transitions. [2024-11-13 14:23:26,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 612 flow [2024-11-13 14:23:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 14:23:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 14:23:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-11-13 14:23:26,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-11-13 14:23:26,482 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 269 flow. Second operand 12 states and 282 transitions. [2024-11-13 14:23:26,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 612 flow [2024-11-13 14:23:26,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 592 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:26,489 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 329 flow [2024-11-13 14:23:26,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=329, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-11-13 14:23:26,490 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-11-13 14:23:26,490 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 329 flow [2024-11-13 14:23:26,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.57894736842105) internal successors, (315), 19 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 14:23:26,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:26,491 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:26,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 14:23:26,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:26,695 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:26,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -856867409, now seen corresponding path program 1 times [2024-11-13 14:23:26,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:26,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457399067] [2024-11-13 14:23:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:26,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:27,007 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 14:23:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457399067] [2024-11-13 14:23:27,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457399067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:27,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133999422] [2024-11-13 14:23:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:27,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:27,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 14:23:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:27,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:23:27,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:27,105 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 14:23:27,114 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 14:23:27,196 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 14:23:27,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-13 14:23:27,234 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:23:27,235 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 14:23:27,489 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 14:23:27,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:27,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133999422] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:27,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:23:27,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-13 14:23:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276080786] [2024-11-13 14:23:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:27,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:23:27,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:23:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:23:27,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:27,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 329 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 14:23:27,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:27,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:27,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:29,002 INFO L124 PetriNetUnfolderBase]: 5751/8880 cut-off events. [2024-11-13 14:23:29,002 INFO L125 PetriNetUnfolderBase]: For 1564/2016 co-relation queries the response was YES. [2024-11-13 14:23:29,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19091 conditions, 8880 events. 5751/8880 cut-off events. For 1564/2016 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 57782 event pairs, 2943 based on Foata normal form. 0/6286 useless extension candidates. Maximal degree in co-relation 19054. Up to 4717 conditions per place. [2024-11-13 14:23:29,052 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 84 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-11-13 14:23:29,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 631 flow [2024-11-13 14:23:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:23:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 14:23:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-11-13 14:23:29,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112781954887218 [2024-11-13 14:23:29,054 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 329 flow. Second operand 7 states and 204 transitions. [2024-11-13 14:23:29,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 631 flow [2024-11-13 14:23:29,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 603 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-13 14:23:29,062 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 358 flow [2024-11-13 14:23:29,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=358, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-11-13 14:23:29,064 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-11-13 14:23:29,064 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 358 flow [2024-11-13 14:23:29,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 14:23:29,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:29,065 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:29,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 14:23:29,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 14:23:29,269 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:29,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash -856867410, now seen corresponding path program 1 times [2024-11-13 14:23:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:29,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773401850] [2024-11-13 14:23:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:29,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:29,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:29,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773401850] [2024-11-13 14:23:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773401850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:29,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:29,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:23:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527159006] [2024-11-13 14:23:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:29,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:29,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:29,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:23:29,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:29,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:29,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:30,166 INFO L124 PetriNetUnfolderBase]: 4001/6348 cut-off events. [2024-11-13 14:23:30,166 INFO L125 PetriNetUnfolderBase]: For 5450/5786 co-relation queries the response was YES. [2024-11-13 14:23:30,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16441 conditions, 6348 events. 4001/6348 cut-off events. For 5450/5786 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 40341 event pairs, 3117 based on Foata normal form. 452/5728 useless extension candidates. Maximal degree in co-relation 16401. Up to 5628 conditions per place. [2024-11-13 14:23:30,212 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 51 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-13 14:23:30,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 71 transitions, 476 flow [2024-11-13 14:23:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:23:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:23:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-13 14:23:30,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2024-11-13 14:23:30,214 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 358 flow. Second operand 5 states and 113 transitions. [2024-11-13 14:23:30,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 71 transitions, 476 flow [2024-11-13 14:23:30,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 71 transitions, 453 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 14:23:30,226 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 351 flow [2024-11-13 14:23:30,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2024-11-13 14:23:30,228 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 27 predicate places. [2024-11-13 14:23:30,228 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 351 flow [2024-11-13 14:23:30,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:23:30,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:30,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:30,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 14:23:30,229 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:30,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -790238646, now seen corresponding path program 1 times [2024-11-13 14:23:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784834272] [2024-11-13 14:23:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:30,293 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 14:23:30,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:30,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784834272] [2024-11-13 14:23:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784834272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:30,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:30,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:23:30,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743381206] [2024-11-13 14:23:30,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:30,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:23:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:23:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:23:30,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:30,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:30,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:30,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:31,221 INFO L124 PetriNetUnfolderBase]: 6473/9923 cut-off events. [2024-11-13 14:23:31,221 INFO L125 PetriNetUnfolderBase]: For 8245/9097 co-relation queries the response was YES. [2024-11-13 14:23:31,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24961 conditions, 9923 events. 6473/9923 cut-off events. For 8245/9097 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 58601 event pairs, 1378 based on Foata normal form. 232/8809 useless extension candidates. Maximal degree in co-relation 24922. Up to 6007 conditions per place. [2024-11-13 14:23:31,257 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 104 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2024-11-13 14:23:31,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 735 flow [2024-11-13 14:23:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:23:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:23:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-13 14:23:31,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-11-13 14:23:31,259 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 351 flow. Second operand 4 states and 136 transitions. [2024-11-13 14:23:31,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 735 flow [2024-11-13 14:23:31,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 720 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:31,265 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 361 flow [2024-11-13 14:23:31,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-13 14:23:31,265 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-11-13 14:23:31,266 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 361 flow [2024-11-13 14:23:31,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:31,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:31,266 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-13 14:23:31,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 14:23:31,266 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:31,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 576930767, now seen corresponding path program 3 times [2024-11-13 14:23:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93583678] [2024-11-13 14:23:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 14:23:31,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93583678] [2024-11-13 14:23:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93583678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927244954] [2024-11-13 14:23:31,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:23:31,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:31,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:31,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:31,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 14:23:31,521 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:23:31,521 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:23:31,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 14:23:31,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:31,541 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 14:23:31,651 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 14:23:31,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2024-11-13 14:23:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:31,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:32,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927244954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:32,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:32,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-13 14:23:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474337693] [2024-11-13 14:23:32,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:32,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:23:32,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:32,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:23:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:23:32,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:32,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 361 flow. Second operand has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 14:23:32,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:32,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:32,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:34,153 INFO L124 PetriNetUnfolderBase]: 5502/8622 cut-off events. [2024-11-13 14:23:34,153 INFO L125 PetriNetUnfolderBase]: For 7833/8441 co-relation queries the response was YES. [2024-11-13 14:23:34,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22992 conditions, 8622 events. 5502/8622 cut-off events. For 7833/8441 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 52622 event pairs, 4206 based on Foata normal form. 3/7297 useless extension candidates. Maximal degree in co-relation 22929. Up to 7608 conditions per place. [2024-11-13 14:23:34,204 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 38 selfloop transitions, 31 changer transitions 0/80 dead transitions. [2024-11-13 14:23:34,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 80 transitions, 544 flow [2024-11-13 14:23:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 14:23:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 14:23:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 335 transitions. [2024-11-13 14:23:34,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32651072124756336 [2024-11-13 14:23:34,206 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 361 flow. Second operand 18 states and 335 transitions. [2024-11-13 14:23:34,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 80 transitions, 544 flow [2024-11-13 14:23:34,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 80 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:34,214 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 461 flow [2024-11-13 14:23:34,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=461, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2024-11-13 14:23:34,215 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-11-13 14:23:34,215 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 461 flow [2024-11-13 14:23:34,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 14:23:34,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:34,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:34,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 14:23:34,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 14:23:34,416 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:34,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1150972591, now seen corresponding path program 1 times [2024-11-13 14:23:34,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:34,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811455288] [2024-11-13 14:23:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:34,650 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 14:23:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811455288] [2024-11-13 14:23:34,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811455288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:34,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160403869] [2024-11-13 14:23:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:34,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:34,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:34,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 14:23:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:34,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 14:23:34,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:34,759 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 14:23:34,766 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 14:23:34,855 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 14:23:34,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-13 14:23:34,883 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:23:34,884 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 14:23:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:35,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160403869] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:35,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:23:35,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-13 14:23:35,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362886676] [2024-11-13 14:23:35,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:35,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 14:23:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 14:23:35,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:23:35,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:35,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:35,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:35,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:35,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:36,454 INFO L124 PetriNetUnfolderBase]: 5294/8222 cut-off events. [2024-11-13 14:23:36,454 INFO L125 PetriNetUnfolderBase]: For 7775/8539 co-relation queries the response was YES. [2024-11-13 14:23:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21821 conditions, 8222 events. 5294/8222 cut-off events. For 7775/8539 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 49539 event pairs, 1430 based on Foata normal form. 0/7044 useless extension candidates. Maximal degree in co-relation 11216. Up to 4476 conditions per place. [2024-11-13 14:23:36,501 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 83 selfloop transitions, 18 changer transitions 0/112 dead transitions. [2024-11-13 14:23:36,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 773 flow [2024-11-13 14:23:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:23:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 14:23:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-11-13 14:23:36,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2024-11-13 14:23:36,503 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 461 flow. Second operand 7 states and 192 transitions. [2024-11-13 14:23:36,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 773 flow [2024-11-13 14:23:36,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 651 flow, removed 21 selfloop flow, removed 15 redundant places. [2024-11-13 14:23:36,510 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 399 flow [2024-11-13 14:23:36,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2024-11-13 14:23:36,510 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-11-13 14:23:36,511 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 399 flow [2024-11-13 14:23:36,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:36,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:36,511 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:36,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 14:23:36,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 14:23:36,715 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:36,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1945814264, now seen corresponding path program 1 times [2024-11-13 14:23:36,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:36,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769471309] [2024-11-13 14:23:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:36,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:36,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769471309] [2024-11-13 14:23:36,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769471309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094419216] [2024-11-13 14:23:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:36,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:36,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 14:23:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:36,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:23:36,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:37,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:37,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094419216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:37,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:37,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 14:23:37,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672944192] [2024-11-13 14:23:37,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:37,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:23:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:23:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:23:37,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:23:37,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 399 flow. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 14:23:37,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:37,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:23:37,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:38,096 INFO L124 PetriNetUnfolderBase]: 5986/9425 cut-off events. [2024-11-13 14:23:38,096 INFO L125 PetriNetUnfolderBase]: For 10059/10244 co-relation queries the response was YES. [2024-11-13 14:23:38,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 9425 events. 5986/9425 cut-off events. For 10059/10244 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 55774 event pairs, 3724 based on Foata normal form. 166/8411 useless extension candidates. Maximal degree in co-relation 14634. Up to 4661 conditions per place. [2024-11-13 14:23:38,137 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 122 selfloop transitions, 29 changer transitions 0/161 dead transitions. [2024-11-13 14:23:38,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 161 transitions, 1001 flow [2024-11-13 14:23:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:23:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:23:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-11-13 14:23:38,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2024-11-13 14:23:38,139 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 399 flow. Second operand 10 states and 280 transitions. [2024-11-13 14:23:38,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 161 transitions, 1001 flow [2024-11-13 14:23:38,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 161 transitions, 963 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-13 14:23:38,151 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 478 flow [2024-11-13 14:23:38,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=478, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2024-11-13 14:23:38,152 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-11-13 14:23:38,152 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 478 flow [2024-11-13 14:23:38,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 14:23:38,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:38,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:38,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 14:23:38,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 14:23:38,353 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:38,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1320412493, now seen corresponding path program 1 times [2024-11-13 14:23:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856291536] [2024-11-13 14:23:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:38,535 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 14:23:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856291536] [2024-11-13 14:23:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856291536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384871132] [2024-11-13 14:23:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:38,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:38,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:38,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:38,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 14:23:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:38,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 14:23:38,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:38,732 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 14:23:38,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:38,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-13 14:23:38,811 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 14:23:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384871132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:38,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-13 14:23:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944615243] [2024-11-13 14:23:38,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:38,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 14:23:38,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:38,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 14:23:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:23:38,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:38,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 478 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 14:23:38,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:38,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:39,729 INFO L124 PetriNetUnfolderBase]: 4541/7418 cut-off events. [2024-11-13 14:23:39,729 INFO L125 PetriNetUnfolderBase]: For 15553/16213 co-relation queries the response was YES. [2024-11-13 14:23:39,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23016 conditions, 7418 events. 4541/7418 cut-off events. For 15553/16213 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 46581 event pairs, 2284 based on Foata normal form. 0/6589 useless extension candidates. Maximal degree in co-relation 12121. Up to 4232 conditions per place. [2024-11-13 14:23:39,764 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 114 selfloop transitions, 19 changer transitions 0/144 dead transitions. [2024-11-13 14:23:39,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 1022 flow [2024-11-13 14:23:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 14:23:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 14:23:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-13 14:23:39,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2024-11-13 14:23:39,766 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 478 flow. Second operand 7 states and 213 transitions. [2024-11-13 14:23:39,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 1022 flow [2024-11-13 14:23:39,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 967 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-13 14:23:39,779 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 493 flow [2024-11-13 14:23:39,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-11-13 14:23:39,780 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-11-13 14:23:39,780 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 493 flow [2024-11-13 14:23:39,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 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 14:23:39,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:39,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:39,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 14:23:39,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 14:23:39,981 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:39,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:39,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1320412492, now seen corresponding path program 1 times [2024-11-13 14:23:39,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:39,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737694932] [2024-11-13 14:23:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:40,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:40,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737694932] [2024-11-13 14:23:40,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737694932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:40,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:23:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947469382] [2024-11-13 14:23:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:40,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:23:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:23:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:23:40,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:40,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 493 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 14:23:40,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:40,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:40,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:40,629 INFO L124 PetriNetUnfolderBase]: 3515/5840 cut-off events. [2024-11-13 14:23:40,630 INFO L125 PetriNetUnfolderBase]: For 14486/14855 co-relation queries the response was YES. [2024-11-13 14:23:40,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19667 conditions, 5840 events. 3515/5840 cut-off events. For 14486/14855 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 35534 event pairs, 2637 based on Foata normal form. 236/5843 useless extension candidates. Maximal degree in co-relation 10565. Up to 5015 conditions per place. [2024-11-13 14:23:40,657 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 68 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-11-13 14:23:40,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 86 transitions, 639 flow [2024-11-13 14:23:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 14:23:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 14:23:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-13 14:23:40,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-13 14:23:40,658 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 493 flow. Second operand 4 states and 96 transitions. [2024-11-13 14:23:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 86 transitions, 639 flow [2024-11-13 14:23:40,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 86 transitions, 610 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 14:23:40,671 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 474 flow [2024-11-13 14:23:40,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=474, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-11-13 14:23:40,672 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-11-13 14:23:40,672 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 474 flow [2024-11-13 14:23:40,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 14:23:40,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:40,672 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:40,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 14:23:40,672 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:40,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2069318012, now seen corresponding path program 2 times [2024-11-13 14:23:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:40,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814063647] [2024-11-13 14:23:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814063647] [2024-11-13 14:23:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814063647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990818244] [2024-11-13 14:23:40,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:23:40,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:40,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:40,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 14:23:41,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:23:41,032 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:23:41,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:23:41,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:41,040 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 14:23:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:23:41,122 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 14:23:41,130 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:23:41,130 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 14:23:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:41,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:41,411 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 14:23:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990818244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:41,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-13 14:23:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878389905] [2024-11-13 14:23:41,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:41,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:23:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:23:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:23:41,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:41,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 474 flow. Second operand has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 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 14:23:41,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:41,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:41,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:43,362 INFO L124 PetriNetUnfolderBase]: 4552/7348 cut-off events. [2024-11-13 14:23:43,362 INFO L125 PetriNetUnfolderBase]: For 14007/14551 co-relation queries the response was YES. [2024-11-13 14:23:43,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24742 conditions, 7348 events. 4552/7348 cut-off events. For 14007/14551 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 44498 event pairs, 2001 based on Foata normal form. 122/7208 useless extension candidates. Maximal degree in co-relation 15495. Up to 2012 conditions per place. [2024-11-13 14:23:43,407 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 169 selfloop transitions, 26 changer transitions 0/206 dead transitions. [2024-11-13 14:23:43,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 206 transitions, 1407 flow [2024-11-13 14:23:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:23:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:23:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 344 transitions. [2024-11-13 14:23:43,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642375168690958 [2024-11-13 14:23:43,410 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 474 flow. Second operand 13 states and 344 transitions. [2024-11-13 14:23:43,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 206 transitions, 1407 flow [2024-11-13 14:23:43,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 206 transitions, 1399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 14:23:43,444 INFO L231 Difference]: Finished difference. Result has 111 places, 91 transitions, 578 flow [2024-11-13 14:23:43,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=578, PETRI_PLACES=111, PETRI_TRANSITIONS=91} [2024-11-13 14:23:43,445 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-11-13 14:23:43,445 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 91 transitions, 578 flow [2024-11-13 14:23:43,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 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 14:23:43,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:43,446 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:43,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 14:23:43,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 14:23:43,650 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:43,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1360963733, now seen corresponding path program 1 times [2024-11-13 14:23:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:43,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631618454] [2024-11-13 14:23:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631618454] [2024-11-13 14:23:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631618454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794709274] [2024-11-13 14:23:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:43,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:43,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:43,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:43,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 14:23:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:43,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:23:43,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:43,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:23:44,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794709274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:44,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:44,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-13 14:23:44,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711403533] [2024-11-13 14:23:44,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:44,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 14:23:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 14:23:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:23:44,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:23:44,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 91 transitions, 578 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:44,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:44,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:23:44,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:44,934 INFO L124 PetriNetUnfolderBase]: 4453/7089 cut-off events. [2024-11-13 14:23:44,934 INFO L125 PetriNetUnfolderBase]: For 25196/25832 co-relation queries the response was YES. [2024-11-13 14:23:45,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25956 conditions, 7089 events. 4453/7089 cut-off events. For 25196/25832 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 40199 event pairs, 2940 based on Foata normal form. 65/6874 useless extension candidates. Maximal degree in co-relation 19592. Up to 4682 conditions per place. [2024-11-13 14:23:45,041 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 106 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2024-11-13 14:23:45,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 145 transitions, 1103 flow [2024-11-13 14:23:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:23:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:23:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-13 14:23:45,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45964912280701753 [2024-11-13 14:23:45,043 INFO L175 Difference]: Start difference. First operand has 111 places, 91 transitions, 578 flow. Second operand 10 states and 262 transitions. [2024-11-13 14:23:45,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 145 transitions, 1103 flow [2024-11-13 14:23:45,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 145 transitions, 1038 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-13 14:23:45,062 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 647 flow [2024-11-13 14:23:45,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=647, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2024-11-13 14:23:45,063 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-11-13 14:23:45,063 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 647 flow [2024-11-13 14:23:45,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:45,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:45,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:45,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 14:23:45,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:45,268 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:45,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -655443246, now seen corresponding path program 1 times [2024-11-13 14:23:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847119189] [2024-11-13 14:23:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:45,453 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 14:23:45,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847119189] [2024-11-13 14:23:45,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847119189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:45,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:45,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 14:23:45,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195693866] [2024-11-13 14:23:45,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:45,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 14:23:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:45,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 14:23:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 14:23:45,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:23:45,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 647 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:45,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:45,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:23:45,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:46,134 INFO L124 PetriNetUnfolderBase]: 4381/7065 cut-off events. [2024-11-13 14:23:46,134 INFO L125 PetriNetUnfolderBase]: For 22982/23608 co-relation queries the response was YES. [2024-11-13 14:23:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26520 conditions, 7065 events. 4381/7065 cut-off events. For 22982/23608 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 41134 event pairs, 3362 based on Foata normal form. 1/6845 useless extension candidates. Maximal degree in co-relation 19066. Up to 6040 conditions per place. [2024-11-13 14:23:46,168 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 81 selfloop transitions, 2 changer transitions 17/110 dead transitions. [2024-11-13 14:23:46,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 110 transitions, 911 flow [2024-11-13 14:23:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:23:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:23:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-13 14:23:46,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-11-13 14:23:46,169 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 647 flow. Second operand 5 states and 135 transitions. [2024-11-13 14:23:46,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 110 transitions, 911 flow [2024-11-13 14:23:46,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 864 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-13 14:23:46,186 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 588 flow [2024-11-13 14:23:46,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=588, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2024-11-13 14:23:46,186 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-11-13 14:23:46,186 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 588 flow [2024-11-13 14:23:46,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:23:46,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:46,186 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:46,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 14:23:46,187 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:46,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1386768877, now seen corresponding path program 3 times [2024-11-13 14:23:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573793567] [2024-11-13 14:23:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:46,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:46,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573793567] [2024-11-13 14:23:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573793567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903339617] [2024-11-13 14:23:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:23:46,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:46,323 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:46,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 14:23:46,428 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:23:46,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:23:46,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 14:23:46,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:46,447 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 14:23:46,454 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 14:23:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:23:46,556 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 14:23:46,571 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:23:46,572 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 14:23:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:23:46,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:23:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903339617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:47,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-13 14:23:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190608934] [2024-11-13 14:23:47,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:47,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:23:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:23:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:23:47,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-13 14:23:47,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 93 transitions, 588 flow. Second operand has 19 states, 19 states have (on average 16.68421052631579) internal successors, (317), 19 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 14:23:47,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:47,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-13 14:23:47,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:49,805 INFO L124 PetriNetUnfolderBase]: 7821/11680 cut-off events. [2024-11-13 14:23:49,805 INFO L125 PetriNetUnfolderBase]: For 27620/28172 co-relation queries the response was YES. [2024-11-13 14:23:49,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44061 conditions, 11680 events. 7821/11680 cut-off events. For 27620/28172 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 69163 event pairs, 1426 based on Foata normal form. 244/11485 useless extension candidates. Maximal degree in co-relation 44025. Up to 1894 conditions per place. [2024-11-13 14:23:49,872 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 290 selfloop transitions, 45 changer transitions 0/345 dead transitions. [2024-11-13 14:23:49,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 345 transitions, 2617 flow [2024-11-13 14:23:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:23:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 14:23:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 585 transitions. [2024-11-13 14:23:49,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4276315789473684 [2024-11-13 14:23:49,874 INFO L175 Difference]: Start difference. First operand has 115 places, 93 transitions, 588 flow. Second operand 24 states and 585 transitions. [2024-11-13 14:23:49,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 345 transitions, 2617 flow [2024-11-13 14:23:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 345 transitions, 2609 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-13 14:23:49,931 INFO L231 Difference]: Finished difference. Result has 132 places, 106 transitions, 796 flow [2024-11-13 14:23:49,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=796, PETRI_PLACES=132, PETRI_TRANSITIONS=106} [2024-11-13 14:23:49,932 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-11-13 14:23:49,932 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 106 transitions, 796 flow [2024-11-13 14:23:49,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.68421052631579) internal successors, (317), 19 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 14:23:49,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:49,932 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:49,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 14:23:50,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 14:23:50,137 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:50,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1716864510, now seen corresponding path program 1 times [2024-11-13 14:23:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:50,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839618878] [2024-11-13 14:23:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:50,243 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 14:23:50,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:50,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839618878] [2024-11-13 14:23:50,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839618878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:50,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264190609] [2024-11-13 14:23:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:50,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:50,246 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:50,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 14:23:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:50,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:23:50,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:50,385 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 14:23:50,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:50,427 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 14:23:50,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264190609] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:50,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:23:50,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2024-11-13 14:23:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25799540] [2024-11-13 14:23:50,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:50,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:23:50,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:23:50,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 106 transitions, 796 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 14:23:50,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:50,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:23:50,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:51,414 INFO L124 PetriNetUnfolderBase]: 6206/10078 cut-off events. [2024-11-13 14:23:51,414 INFO L125 PetriNetUnfolderBase]: For 39710/40403 co-relation queries the response was YES. [2024-11-13 14:23:51,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40530 conditions, 10078 events. 6206/10078 cut-off events. For 39710/40403 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65336 event pairs, 4432 based on Foata normal form. 46/9686 useless extension candidates. Maximal degree in co-relation 23076. Up to 8731 conditions per place. [2024-11-13 14:23:51,474 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 63 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-11-13 14:23:51,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 101 transitions, 914 flow [2024-11-13 14:23:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:23:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:23:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-11-13 14:23:51,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4245614035087719 [2024-11-13 14:23:51,475 INFO L175 Difference]: Start difference. First operand has 132 places, 106 transitions, 796 flow. Second operand 5 states and 121 transitions. [2024-11-13 14:23:51,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 101 transitions, 914 flow [2024-11-13 14:23:51,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 101 transitions, 813 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-11-13 14:23:51,539 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 687 flow [2024-11-13 14:23:51,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=687, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2024-11-13 14:23:51,540 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-11-13 14:23:51,540 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 687 flow [2024-11-13 14:23:51,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 14:23:51,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:51,540 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:51,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 14:23:51,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:51,741 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:51,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -372376212, now seen corresponding path program 1 times [2024-11-13 14:23:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110498051] [2024-11-13 14:23:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:23:51,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:51,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110498051] [2024-11-13 14:23:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110498051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:51,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:51,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:23:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552030126] [2024-11-13 14:23:51,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:51,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:51,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:51,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:51,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:51,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 687 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:51,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:51,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:51,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:53,185 INFO L124 PetriNetUnfolderBase]: 10574/16474 cut-off events. [2024-11-13 14:23:53,185 INFO L125 PetriNetUnfolderBase]: For 49135/49585 co-relation queries the response was YES. [2024-11-13 14:23:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60432 conditions, 16474 events. 10574/16474 cut-off events. For 49135/49585 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 104821 event pairs, 3425 based on Foata normal form. 448/16534 useless extension candidates. Maximal degree in co-relation 50633. Up to 8613 conditions per place. [2024-11-13 14:23:53,279 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 210 selfloop transitions, 17 changer transitions 0/238 dead transitions. [2024-11-13 14:23:53,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 238 transitions, 2186 flow [2024-11-13 14:23:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-13 14:23:53,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-13 14:23:53,280 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 687 flow. Second operand 6 states and 186 transitions. [2024-11-13 14:23:53,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 238 transitions, 2186 flow [2024-11-13 14:23:53,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 238 transitions, 2060 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-13 14:23:53,328 INFO L231 Difference]: Finished difference. Result has 124 places, 112 transitions, 789 flow [2024-11-13 14:23:53,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=789, PETRI_PLACES=124, PETRI_TRANSITIONS=112} [2024-11-13 14:23:53,329 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-11-13 14:23:53,329 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 112 transitions, 789 flow [2024-11-13 14:23:53,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:53,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:53,329 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:53,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 14:23:53,330 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:53,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -883381172, now seen corresponding path program 2 times [2024-11-13 14:23:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319451287] [2024-11-13 14:23:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:23:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319451287] [2024-11-13 14:23:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319451287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:53,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:23:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603192236] [2024-11-13 14:23:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:53,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:53,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 112 transitions, 789 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:53,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:53,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:53,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:55,350 INFO L124 PetriNetUnfolderBase]: 15429/24137 cut-off events. [2024-11-13 14:23:55,350 INFO L125 PetriNetUnfolderBase]: For 82346/82897 co-relation queries the response was YES. [2024-11-13 14:23:55,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89009 conditions, 24137 events. 15429/24137 cut-off events. For 82346/82897 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 162887 event pairs, 5813 based on Foata normal form. 465/23916 useless extension candidates. Maximal degree in co-relation 75051. Up to 9409 conditions per place. [2024-11-13 14:23:55,488 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 230 selfloop transitions, 14 changer transitions 0/255 dead transitions. [2024-11-13 14:23:55,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 2333 flow [2024-11-13 14:23:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-11-13 14:23:55,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2024-11-13 14:23:55,489 INFO L175 Difference]: Start difference. First operand has 124 places, 112 transitions, 789 flow. Second operand 6 states and 184 transitions. [2024-11-13 14:23:55,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 2333 flow [2024-11-13 14:23:55,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 255 transitions, 2296 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-13 14:23:55,593 INFO L231 Difference]: Finished difference. Result has 131 places, 120 transitions, 922 flow [2024-11-13 14:23:55,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=922, PETRI_PLACES=131, PETRI_TRANSITIONS=120} [2024-11-13 14:23:55,594 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-11-13 14:23:55,594 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 120 transitions, 922 flow [2024-11-13 14:23:55,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:55,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:55,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:55,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-13 14:23:55,594 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:55,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash 402188614, now seen corresponding path program 3 times [2024-11-13 14:23:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:55,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762420162] [2024-11-13 14:23:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:55,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:23:55,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762420162] [2024-11-13 14:23:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762420162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:23:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 14:23:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 14:23:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970936210] [2024-11-13 14:23:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:23:55,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:23:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:23:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 14:23:55,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:23:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 120 transitions, 922 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:23:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:23:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:23:58,682 INFO L124 PetriNetUnfolderBase]: 16010/25057 cut-off events. [2024-11-13 14:23:58,683 INFO L125 PetriNetUnfolderBase]: For 95182/96049 co-relation queries the response was YES. [2024-11-13 14:23:58,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92679 conditions, 25057 events. 16010/25057 cut-off events. For 95182/96049 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 164968 event pairs, 3437 based on Foata normal form. 451/24999 useless extension candidates. Maximal degree in co-relation 78463. Up to 11014 conditions per place. [2024-11-13 14:23:58,829 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 204 selfloop transitions, 27 changer transitions 0/242 dead transitions. [2024-11-13 14:23:58,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 242 transitions, 2256 flow [2024-11-13 14:23:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 14:23:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 14:23:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-13 14:23:58,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-13 14:23:58,830 INFO L175 Difference]: Start difference. First operand has 131 places, 120 transitions, 922 flow. Second operand 6 states and 186 transitions. [2024-11-13 14:23:58,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 242 transitions, 2256 flow [2024-11-13 14:23:58,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 242 transitions, 2233 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-13 14:23:58,932 INFO L231 Difference]: Finished difference. Result has 137 places, 122 transitions, 1018 flow [2024-11-13 14:23:58,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=137, PETRI_TRANSITIONS=122} [2024-11-13 14:23:58,932 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-11-13 14:23:58,932 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 122 transitions, 1018 flow [2024-11-13 14:23:58,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:23:58,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:23:58,933 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:23:58,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 14:23:58,933 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:23:58,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:23:58,933 INFO L85 PathProgramCache]: Analyzing trace with hash -32965991, now seen corresponding path program 2 times [2024-11-13 14:23:58,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:23:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942861093] [2024-11-13 14:23:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:23:58,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:23:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:23:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:23:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942861093] [2024-11-13 14:23:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942861093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:23:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329398927] [2024-11-13 14:23:59,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:23:59,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:23:59,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:23:59,150 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:23:59,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 14:23:59,277 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 14:23:59,277 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:23:59,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 14:23:59,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:23:59,284 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 14:23:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:23:59,363 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 14:23:59,370 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:23:59,371 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 14:23:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:59,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:23:59,686 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 14:23:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:23:59,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329398927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:23:59,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:23:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-13 14:23:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506374865] [2024-11-13 14:23:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:23:59,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 14:23:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:23:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 14:23:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-13 14:24:00,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-13 14:24:00,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 122 transitions, 1018 flow. Second operand has 20 states, 20 states have (on average 17.55) internal successors, (351), 20 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 14:24:00,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:00,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-13 14:24:00,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:03,041 INFO L124 PetriNetUnfolderBase]: 13445/22137 cut-off events. [2024-11-13 14:24:03,041 INFO L125 PetriNetUnfolderBase]: For 87101/87924 co-relation queries the response was YES. [2024-11-13 14:24:03,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83184 conditions, 22137 events. 13445/22137 cut-off events. For 87101/87924 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 156287 event pairs, 3666 based on Foata normal form. 342/21744 useless extension candidates. Maximal degree in co-relation 70683. Up to 6003 conditions per place. [2024-11-13 14:24:03,207 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 180 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-11-13 14:24:03,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 235 transitions, 2176 flow [2024-11-13 14:24:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 14:24:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 14:24:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 317 transitions. [2024-11-13 14:24:03,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42780026990553305 [2024-11-13 14:24:03,209 INFO L175 Difference]: Start difference. First operand has 137 places, 122 transitions, 1018 flow. Second operand 13 states and 317 transitions. [2024-11-13 14:24:03,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 235 transitions, 2176 flow [2024-11-13 14:24:03,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 2104 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-13 14:24:03,363 INFO L231 Difference]: Finished difference. Result has 148 places, 128 transitions, 1109 flow [2024-11-13 14:24:03,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1109, PETRI_PLACES=148, PETRI_TRANSITIONS=128} [2024-11-13 14:24:03,364 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-11-13 14:24:03,364 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 128 transitions, 1109 flow [2024-11-13 14:24:03,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.55) internal successors, (351), 20 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 14:24:03,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:03,364 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:03,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 14:24:03,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:03,565 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:03,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1021945181, now seen corresponding path program 1 times [2024-11-13 14:24:03,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:03,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76231624] [2024-11-13 14:24:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:03,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 14:24:03,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76231624] [2024-11-13 14:24:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76231624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691810771] [2024-11-13 14:24:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:03,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:03,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 14:24:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:04,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 14:24:04,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:24:04,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:24:04,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-13 14:24:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:24:04,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691810771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:24:04,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:24:04,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-13 14:24:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928265127] [2024-11-13 14:24:04,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:24:04,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 14:24:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 14:24:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-13 14:24:04,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:24:04,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 128 transitions, 1109 flow. Second operand has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 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 14:24:04,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:04,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:24:04,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:07,539 INFO L124 PetriNetUnfolderBase]: 12611/20734 cut-off events. [2024-11-13 14:24:07,539 INFO L125 PetriNetUnfolderBase]: For 90106/90872 co-relation queries the response was YES. [2024-11-13 14:24:07,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81352 conditions, 20734 events. 12611/20734 cut-off events. For 90106/90872 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 148082 event pairs, 4400 based on Foata normal form. 342/20344 useless extension candidates. Maximal degree in co-relation 69188. Up to 8525 conditions per place. [2024-11-13 14:24:07,667 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 180 selfloop transitions, 34 changer transitions 0/234 dead transitions. [2024-11-13 14:24:07,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 234 transitions, 2207 flow [2024-11-13 14:24:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 14:24:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 14:24:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2024-11-13 14:24:07,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.449874686716792 [2024-11-13 14:24:07,668 INFO L175 Difference]: Start difference. First operand has 148 places, 128 transitions, 1109 flow. Second operand 14 states and 359 transitions. [2024-11-13 14:24:07,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 234 transitions, 2207 flow [2024-11-13 14:24:07,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 234 transitions, 2143 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-13 14:24:07,967 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 1153 flow [2024-11-13 14:24:07,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1153, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2024-11-13 14:24:07,968 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 98 predicate places. [2024-11-13 14:24:07,968 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 1153 flow [2024-11-13 14:24:07,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 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 14:24:07,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:07,968 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:07,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 14:24:08,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:08,169 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:08,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2112572612, now seen corresponding path program 1 times [2024-11-13 14:24:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:08,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528053903] [2024-11-13 14:24:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:08,298 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 14:24:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528053903] [2024-11-13 14:24:08,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528053903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:08,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535071172] [2024-11-13 14:24:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:08,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:08,300 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 14:24:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:08,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:24:08,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:08,462 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 14:24:08,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:24:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:24:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535071172] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:08,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:24:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-13 14:24:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200661197] [2024-11-13 14:24:08,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:24:08,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:24:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:24:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:24:08,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:24:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 1153 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 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 14:24:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:08,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:24:08,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:11,524 INFO L124 PetriNetUnfolderBase]: 14809/22849 cut-off events. [2024-11-13 14:24:11,524 INFO L125 PetriNetUnfolderBase]: For 115701/116298 co-relation queries the response was YES. [2024-11-13 14:24:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94359 conditions, 22849 events. 14809/22849 cut-off events. For 115701/116298 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 151790 event pairs, 4771 based on Foata normal form. 964/22839 useless extension candidates. Maximal degree in co-relation 72463. Up to 12237 conditions per place. [2024-11-13 14:24:11,651 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 145 selfloop transitions, 13 changer transitions 0/173 dead transitions. [2024-11-13 14:24:11,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 173 transitions, 1975 flow [2024-11-13 14:24:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:24:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:24:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-13 14:24:11,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47017543859649125 [2024-11-13 14:24:11,652 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 1153 flow. Second operand 5 states and 134 transitions. [2024-11-13 14:24:11,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 173 transitions, 1975 flow [2024-11-13 14:24:11,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 173 transitions, 1900 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-13 14:24:11,815 INFO L231 Difference]: Finished difference. Result has 147 places, 125 transitions, 1081 flow [2024-11-13 14:24:11,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1081, PETRI_PLACES=147, PETRI_TRANSITIONS=125} [2024-11-13 14:24:11,815 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2024-11-13 14:24:11,815 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 125 transitions, 1081 flow [2024-11-13 14:24:11,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 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 14:24:11,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:11,816 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:11,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 14:24:12,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:12,020 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:12,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1487870831, now seen corresponding path program 1 times [2024-11-13 14:24:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:12,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116038166] [2024-11-13 14:24:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:12,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:24:12,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116038166] [2024-11-13 14:24:12,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116038166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:12,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279426809] [2024-11-13 14:24:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:12,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:12,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:12,119 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:12,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 14:24:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:12,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 14:24:12,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:24:12,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:24:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 14:24:12,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279426809] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:12,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 14:24:12,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-13 14:24:12,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762610377] [2024-11-13 14:24:12,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:24:12,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 14:24:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 14:24:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-13 14:24:12,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-13 14:24:12,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 125 transitions, 1081 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 14:24:12,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:12,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-13 14:24:12,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:14,751 INFO L124 PetriNetUnfolderBase]: 13328/22123 cut-off events. [2024-11-13 14:24:14,752 INFO L125 PetriNetUnfolderBase]: For 107156/107568 co-relation queries the response was YES. [2024-11-13 14:24:14,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87533 conditions, 22123 events. 13328/22123 cut-off events. For 107156/107568 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 156235 event pairs, 3281 based on Foata normal form. 255/21672 useless extension candidates. Maximal degree in co-relation 67716. Up to 12702 conditions per place. [2024-11-13 14:24:15,128 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 113 selfloop transitions, 17 changer transitions 0/149 dead transitions. [2024-11-13 14:24:15,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 149 transitions, 1454 flow [2024-11-13 14:24:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 14:24:15,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 14:24:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-13 14:24:15,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-13 14:24:15,129 INFO L175 Difference]: Start difference. First operand has 147 places, 125 transitions, 1081 flow. Second operand 5 states and 130 transitions. [2024-11-13 14:24:15,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 149 transitions, 1454 flow [2024-11-13 14:24:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 149 transitions, 1404 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-13 14:24:15,245 INFO L231 Difference]: Finished difference. Result has 147 places, 120 transitions, 1006 flow [2024-11-13 14:24:15,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1006, PETRI_PLACES=147, PETRI_TRANSITIONS=120} [2024-11-13 14:24:15,246 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2024-11-13 14:24:15,246 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 120 transitions, 1006 flow [2024-11-13 14:24:15,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 14:24:15,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:15,246 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:15,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 14:24:15,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:15,451 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:15,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2084693761, now seen corresponding path program 3 times [2024-11-13 14:24:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52888807] [2024-11-13 14:24:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 14:24:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52888807] [2024-11-13 14:24:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52888807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8209090] [2024-11-13 14:24:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:24:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:15,589 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:15,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 14:24:15,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 14:24:15,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:24:15,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 14:24:15,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:15,728 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 14:24:15,734 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 14:24:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 14:24:15,803 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 14:24:15,815 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 14:24:15,815 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 14:24:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:24:16,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:24:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 14:24:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8209090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:24:16,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:24:16,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-13 14:24:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555138166] [2024-11-13 14:24:16,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:24:16,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 14:24:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 14:24:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-13 14:24:16,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-13 14:24:16,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 120 transitions, 1006 flow. Second operand has 19 states, 19 states have (on average 17.31578947368421) internal successors, (329), 19 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:24:16,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:16,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-13 14:24:16,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:19,799 INFO L124 PetriNetUnfolderBase]: 10493/17362 cut-off events. [2024-11-13 14:24:19,799 INFO L125 PetriNetUnfolderBase]: For 90318/90550 co-relation queries the response was YES. [2024-11-13 14:24:19,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71066 conditions, 17362 events. 10493/17362 cut-off events. For 90318/90550 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 118246 event pairs, 1819 based on Foata normal form. 358/17214 useless extension candidates. Maximal degree in co-relation 56479. Up to 4084 conditions per place. [2024-11-13 14:24:19,901 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 241 selfloop transitions, 50 changer transitions 0/310 dead transitions. [2024-11-13 14:24:19,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 310 transitions, 2804 flow [2024-11-13 14:24:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 14:24:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 14:24:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 529 transitions. [2024-11-13 14:24:19,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38669590643274854 [2024-11-13 14:24:19,903 INFO L175 Difference]: Start difference. First operand has 147 places, 120 transitions, 1006 flow. Second operand 24 states and 529 transitions. [2024-11-13 14:24:19,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 310 transitions, 2804 flow [2024-11-13 14:24:20,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 310 transitions, 2772 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-13 14:24:20,037 INFO L231 Difference]: Finished difference. Result has 167 places, 133 transitions, 1275 flow [2024-11-13 14:24:20,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1275, PETRI_PLACES=167, PETRI_TRANSITIONS=133} [2024-11-13 14:24:20,038 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 110 predicate places. [2024-11-13 14:24:20,038 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 133 transitions, 1275 flow [2024-11-13 14:24:20,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.31578947368421) internal successors, (329), 19 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 14:24:20,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:20,038 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:20,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 14:24:20,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:20,239 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:20,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1553197960, now seen corresponding path program 1 times [2024-11-13 14:24:20,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:20,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145422394] [2024-11-13 14:24:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 14:24:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145422394] [2024-11-13 14:24:20,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145422394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:20,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073433058] [2024-11-13 14:24:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:20,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 14:24:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:20,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 14:24:20,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 14:24:20,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 14:24:20,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-13 14:24:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 14:24:20,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073433058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 14:24:20,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 14:24:20,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-13 14:24:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135221219] [2024-11-13 14:24:20,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 14:24:20,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 14:24:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 14:24:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-13 14:24:20,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-13 14:24:20,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 133 transitions, 1275 flow. Second operand has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 14:24:20,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:20,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-13 14:24:20,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:25,650 INFO L124 PetriNetUnfolderBase]: 20242/34375 cut-off events. [2024-11-13 14:24:25,650 INFO L125 PetriNetUnfolderBase]: For 198434/199267 co-relation queries the response was YES. [2024-11-13 14:24:25,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141935 conditions, 34375 events. 20242/34375 cut-off events. For 198434/199267 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 262752 event pairs, 3003 based on Foata normal form. 0/32865 useless extension candidates. Maximal degree in co-relation 119248. Up to 5015 conditions per place. [2024-11-13 14:24:25,884 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 553 selfloop transitions, 84 changer transitions 0/661 dead transitions. [2024-11-13 14:24:25,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 661 transitions, 6818 flow [2024-11-13 14:24:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 14:24:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 14:24:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 681 transitions. [2024-11-13 14:24:25,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194508009153318 [2024-11-13 14:24:25,886 INFO L175 Difference]: Start difference. First operand has 167 places, 133 transitions, 1275 flow. Second operand 23 states and 681 transitions. [2024-11-13 14:24:25,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 661 transitions, 6818 flow [2024-11-13 14:24:26,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 661 transitions, 6494 flow, removed 83 selfloop flow, removed 14 redundant places. [2024-11-13 14:24:26,125 INFO L231 Difference]: Finished difference. Result has 193 places, 209 transitions, 2226 flow [2024-11-13 14:24:26,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2226, PETRI_PLACES=193, PETRI_TRANSITIONS=209} [2024-11-13 14:24:26,125 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 136 predicate places. [2024-11-13 14:24:26,125 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 209 transitions, 2226 flow [2024-11-13 14:24:26,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 0 states have call successors, (0), 0 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 14:24:26,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:26,126 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:26,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 14:24:26,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 14:24:26,326 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:26,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1780546688, now seen corresponding path program 2 times [2024-11-13 14:24:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975423477] [2024-11-13 14:24:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 14:24:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975423477] [2024-11-13 14:24:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975423477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334822392] [2024-11-13 14:24:26,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 14:24:26,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:26,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:26,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:26,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 14:24:26,562 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 14:24:26,562 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:24:26,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:24:26,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 14:24:26,695 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:24:26,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334822392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:24:26,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:24:26,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-11-13 14:24:26,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911630639] [2024-11-13 14:24:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:24:26,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:24:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:24:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:24:26,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-13 14:24:26,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 209 transitions, 2226 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 14:24:26,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:26,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-13 14:24:26,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 14:24:37,953 INFO L124 PetriNetUnfolderBase]: 46973/71555 cut-off events. [2024-11-13 14:24:37,953 INFO L125 PetriNetUnfolderBase]: For 690621/691246 co-relation queries the response was YES. [2024-11-13 14:24:38,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351396 conditions, 71555 events. 46973/71555 cut-off events. For 690621/691246 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 512652 event pairs, 10786 based on Foata normal form. 871/72292 useless extension candidates. Maximal degree in co-relation 312122. Up to 23995 conditions per place. [2024-11-13 14:24:38,522 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 378 selfloop transitions, 127 changer transitions 0/519 dead transitions. [2024-11-13 14:24:38,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 519 transitions, 6196 flow [2024-11-13 14:24:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 14:24:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 14:24:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-13 14:24:38,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45964912280701753 [2024-11-13 14:24:38,524 INFO L175 Difference]: Start difference. First operand has 193 places, 209 transitions, 2226 flow. Second operand 10 states and 262 transitions. [2024-11-13 14:24:38,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 519 transitions, 6196 flow [2024-11-13 14:24:41,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 519 transitions, 5996 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-11-13 14:24:41,022 INFO L231 Difference]: Finished difference. Result has 203 places, 280 transitions, 3660 flow [2024-11-13 14:24:41,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3660, PETRI_PLACES=203, PETRI_TRANSITIONS=280} [2024-11-13 14:24:41,022 INFO L277 CegarLoopForPetriNet]: 57 programPoint places, 146 predicate places. [2024-11-13 14:24:41,023 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 280 transitions, 3660 flow [2024-11-13 14:24:41,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 14:24:41,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 14:24:41,023 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 14:24:41,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 14:24:41,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 14:24:41,223 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-13 14:24:41,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 14:24:41,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1695642338, now seen corresponding path program 3 times [2024-11-13 14:24:41,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 14:24:41,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906054759] [2024-11-13 14:24:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 14:24:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 14:24:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 14:24:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 14:24:41,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 14:24:41,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906054759] [2024-11-13 14:24:41,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906054759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 14:24:41,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065723204] [2024-11-13 14:24:41,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 14:24:41,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 14:24:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 14:24:41,532 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 14:24:41,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b398055b-401a-4013-9f17-05490ace48f6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 14:24:41,635 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 14:24:41,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 14:24:41,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 14:24:41,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 14:24:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 14:24:41,760 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 14:24:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065723204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 14:24:41,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 14:24:41,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-11-13 14:24:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084130464] [2024-11-13 14:24:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 14:24:41,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 14:24:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 14:24:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 14:24:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-13 14:24:41,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-13 14:24:41,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 280 transitions, 3660 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 14:24:41,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 14:24:41,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-13 14:24:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand