./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.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_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/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_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/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_1f36d962-8521-4fc3-90c5-36e5e7818810/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 b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:41:34,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:41:34,929 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 15:41:34,936 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:41:34,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:41:34,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:41:34,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:41:34,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:41:34,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:41:34,959 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:41:34,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:41:34,960 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:41:34,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:41:34,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:41:34,960 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:41:34,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:41:34,961 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:41:34,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:41:34,962 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:41:34,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:41:34,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:41:34,963 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_1f36d962-8521-4fc3-90c5-36e5e7818810/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 -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-11-13 15:41:35,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:41:35,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:41:35,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:41:35,286 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:41:35,287 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:41:35,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c Unable to find full path for "g++" [2024-11-13 15:41:37,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:41:37,438 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:41:37,441 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-13 15:41:37,451 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/data/f12af5489/4ac77168323c49d5a575edfaf03621fe/FLAG4c988ff2d [2024-11-13 15:41:37,473 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/data/f12af5489/4ac77168323c49d5a575edfaf03621fe [2024-11-13 15:41:37,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:41:37,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:41:37,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:41:37,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:41:37,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:41:37,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3545f2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37, skipping insertion in model container [2024-11-13 15:41:37,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,507 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:41:37,731 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 15:41:37,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:41:37,748 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:41:37,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:41:37,806 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:41:37,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37 WrapperNode [2024-11-13 15:41:37,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:41:37,811 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:41:37,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:41:37,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:41:37,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,859 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 167 [2024-11-13 15:41:37,863 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:41:37,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:41:37,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:41:37,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:41:37,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,897 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 15:41:37,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,905 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:41:37,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:41:37,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:41:37,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:41:37,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (1/1) ... [2024-11-13 15:41:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:41:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:37,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:41:37,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:41:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:41:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 15:41:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 15:41:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:41:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:41:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:41:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:41:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:41:37,989 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 15:41:38,116 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:41:38,119 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:41:38,646 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 15:41:38,646 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:41:38,948 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:41:38,948 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 15:41:38,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:41:38 BoogieIcfgContainer [2024-11-13 15:41:38,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:41:38,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:41:38,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:41:38,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:41:38,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:41:37" (1/3) ... [2024-11-13 15:41:38,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b946ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:41:38, skipping insertion in model container [2024-11-13 15:41:38,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:41:37" (2/3) ... [2024-11-13 15:41:38,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b946ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:41:38, skipping insertion in model container [2024-11-13 15:41:38,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:41:38" (3/3) ... [2024-11-13 15:41:38,962 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-11-13 15:41:38,980 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:41:38,981 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-opt-symm.wvr.c that has 3 procedures, 59 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-11-13 15:41:38,982 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 15:41:39,094 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 15:41:39,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-13 15:41:39,200 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-13 15:41:39,203 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 15:41:39,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-13 15:41:39,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-13 15:41:39,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-13 15:41:39,226 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:41:39,238 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;@125aa3d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:41:39,238 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-13 15:41:39,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 15:41:39,242 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 15:41:39,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:41:39,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:39,243 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:41:39,243 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:39,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash 526145, now seen corresponding path program 1 times [2024-11-13 15:41:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973561001] [2024-11-13 15:41:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:39,544 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 15:41:39,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973561001] [2024-11-13 15:41:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973561001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:41:39,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:41:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:41:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120137442] [2024-11-13 15:41:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:39,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:41:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:41:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:41:39,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 15:41:39,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 15:41:39,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:39,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 15:41:39,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:39,918 INFO L124 PetriNetUnfolderBase]: 183/426 cut-off events. [2024-11-13 15:41:39,922 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-13 15:41:39,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 426 events. 183/426 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2160 event pairs, 100 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 667. Up to 275 conditions per place. [2024-11-13 15:41:39,930 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-13 15:41:39,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 190 flow [2024-11-13 15:41:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:41:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:41:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-13 15:41:39,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-11-13 15:41:39,951 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-11-13 15:41:39,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 190 flow [2024-11-13 15:41:39,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 15:41:39,965 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-13 15:41:39,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-13 15:41:39,973 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-13 15:41:39,974 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-13 15:41:39,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 15:41:39,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:39,975 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:41:39,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:41:39,976 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:40,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 526146, now seen corresponding path program 1 times [2024-11-13 15:41:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295713686] [2024-11-13 15:41:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:40,362 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 15:41:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295713686] [2024-11-13 15:41:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295713686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:41:40,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:41:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:41:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382457882] [2024-11-13 15:41:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:40,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:41:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:41:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:41:40,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 15:41:40,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 15:41:40,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:40,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 15:41:40,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:40,637 INFO L124 PetriNetUnfolderBase]: 183/430 cut-off events. [2024-11-13 15:41:40,637 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 15:41:40,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 430 events. 183/430 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2142 event pairs, 100 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 697. Up to 283 conditions per place. [2024-11-13 15:41:40,645 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 32 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-13 15:41:40,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 206 flow [2024-11-13 15:41:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:41:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:41:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-13 15:41:40,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-11-13 15:41:40,649 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 3 states and 136 transitions. [2024-11-13 15:41:40,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 206 flow [2024-11-13 15:41:40,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:41:40,654 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 148 flow [2024-11-13 15:41:40,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-11-13 15:41:40,655 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-11-13 15:41:40,655 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 148 flow [2024-11-13 15:41:40,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 15:41:40,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:40,656 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 15:41:40,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:41:40,656 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:40,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 505643122, now seen corresponding path program 1 times [2024-11-13 15:41:40,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:40,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073875502] [2024-11-13 15:41:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:40,981 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 15:41:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073875502] [2024-11-13 15:41:40,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073875502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:40,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435101373] [2024-11-13 15:41:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:40,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:40,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:41:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:41,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:41:41,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:41,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 15:41:41,235 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 15:41:41,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:41,351 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 15:41:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435101373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:41,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:41:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-13 15:41:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762982898] [2024-11-13 15:41:41,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:41,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:41:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:41:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:41:41,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 15:41:41,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 15:41:41,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:41,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 15:41:41,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:42,068 INFO L124 PetriNetUnfolderBase]: 187/446 cut-off events. [2024-11-13 15:41:42,068 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 15:41:42,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 446 events. 187/446 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2179 event pairs, 100 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 729. Up to 285 conditions per place. [2024-11-13 15:41:42,074 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 38 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-11-13 15:41:42,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 310 flow [2024-11-13 15:41:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:41:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:41:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2024-11-13 15:41:42,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-13 15:41:42,079 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 148 flow. Second operand 6 states and 252 transitions. [2024-11-13 15:41:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 310 flow [2024-11-13 15:41:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:41:42,084 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 246 flow [2024-11-13 15:41:42,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2024-11-13 15:41:42,086 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-13 15:41:42,086 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 246 flow [2024-11-13 15:41:42,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 15:41:42,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:42,087 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-13 15:41:42,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:41:42,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:42,291 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:42,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 44606466, now seen corresponding path program 2 times [2024-11-13 15:41:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413369615] [2024-11-13 15:41:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:41:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413369615] [2024-11-13 15:41:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413369615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944214187] [2024-11-13 15:41:42,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:41:42,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:42,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:42,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:41:42,843 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:41:42,843 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:41:42,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 15:41:42,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:42,858 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 15:41:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:41:43,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:41:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944214187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:43,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:41:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-13 15:41:43,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529147743] [2024-11-13 15:41:43,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:43,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:41:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:41:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:41:44,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 15:41:44,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 246 flow. Second operand has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 15:41:44,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:44,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 15:41:44,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:44,600 INFO L124 PetriNetUnfolderBase]: 183/446 cut-off events. [2024-11-13 15:41:44,601 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-13 15:41:44,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 446 events. 183/446 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2151 event pairs, 100 based on Foata normal form. 8/332 useless extension candidates. Maximal degree in co-relation 727. Up to 283 conditions per place. [2024-11-13 15:41:44,604 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 40 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-11-13 15:41:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 354 flow [2024-11-13 15:41:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:41:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:41:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2024-11-13 15:41:44,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2024-11-13 15:41:44,606 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 246 flow. Second operand 7 states and 284 transitions. [2024-11-13 15:41:44,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 354 flow [2024-11-13 15:41:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 338 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 15:41:44,610 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 252 flow [2024-11-13 15:41:44,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-11-13 15:41:44,611 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2024-11-13 15:41:44,611 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 252 flow [2024-11-13 15:41:44,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 15:41:44,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:44,612 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-13 15:41:44,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:41:44,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:44,816 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:44,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -82842318, now seen corresponding path program 3 times [2024-11-13 15:41:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317464093] [2024-11-13 15:41:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:41:45,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:45,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317464093] [2024-11-13 15:41:45,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317464093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020968289] [2024-11-13 15:41:45,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:41:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:45,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:45,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:41:45,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 15:41:45,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:41:45,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:41:45,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:45,127 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 15:41:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:41:45,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:41:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020968289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:45,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:41:45,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-13 15:41:45,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191121322] [2024-11-13 15:41:45,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:45,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:41:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:41:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:41:46,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 15:41:46,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 252 flow. Second operand has 14 states, 14 states have (on average 33.785714285714285) internal successors, (473), 14 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 15:41:46,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:46,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 15:41:46,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:46,576 INFO L124 PetriNetUnfolderBase]: 181/440 cut-off events. [2024-11-13 15:41:46,576 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-13 15:41:46,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 440 events. 181/440 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2133 event pairs, 100 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 724. Up to 275 conditions per place. [2024-11-13 15:41:46,580 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 27 selfloop transitions, 19 changer transitions 0/73 dead transitions. [2024-11-13 15:41:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 73 transitions, 320 flow [2024-11-13 15:41:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:41:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 15:41:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 400 transitions. [2024-11-13 15:41:46,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5509641873278237 [2024-11-13 15:41:46,583 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 252 flow. Second operand 11 states and 400 transitions. [2024-11-13 15:41:46,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 73 transitions, 320 flow [2024-11-13 15:41:46,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 278 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-13 15:41:46,586 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 232 flow [2024-11-13 15:41:46,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=232, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-11-13 15:41:46,587 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 8 predicate places. [2024-11-13 15:41:46,588 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 232 flow [2024-11-13 15:41:46,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.785714285714285) internal successors, (473), 14 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 15:41:46,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:46,588 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:46,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:41:46,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:46,792 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:46,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1576870220, now seen corresponding path program 1 times [2024-11-13 15:41:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:46,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523350491] [2024-11-13 15:41:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 15:41:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523350491] [2024-11-13 15:41:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523350491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:41:47,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:41:47,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:41:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863668711] [2024-11-13 15:41:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:47,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:41:47,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:47,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:41:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:41:47,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-13 15:41:47,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 15:41:47,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:47,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-13 15:41:47,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:47,240 INFO L124 PetriNetUnfolderBase]: 258/568 cut-off events. [2024-11-13 15:41:47,240 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-13 15:41:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 568 events. 258/568 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2878 event pairs, 159 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 954. Up to 396 conditions per place. [2024-11-13 15:41:47,244 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 46 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-11-13 15:41:47,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 322 flow [2024-11-13 15:41:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:41:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:41:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-13 15:41:47,246 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-13 15:41:47,246 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 232 flow. Second operand 5 states and 162 transitions. [2024-11-13 15:41:47,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 322 flow [2024-11-13 15:41:47,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 284 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-13 15:41:47,248 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 192 flow [2024-11-13 15:41:47,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2024-11-13 15:41:47,252 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -1 predicate places. [2024-11-13 15:41:47,253 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 192 flow [2024-11-13 15:41:47,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 15:41:47,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:47,253 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:47,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:41:47,253 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:47,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1576870219, now seen corresponding path program 1 times [2024-11-13 15:41:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:47,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090987143] [2024-11-13 15:41:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:47,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090987143] [2024-11-13 15:41:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090987143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510860287] [2024-11-13 15:41:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:47,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:47,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:41:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:48,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 15:41:48,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:48,085 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 15:41:48,093 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 15:41:48,234 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:41:48,234 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 15:41:48,251 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 14 treesize of output 9 [2024-11-13 15:41:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:48,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510860287] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:49,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:41:49,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-11-13 15:41:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143087121] [2024-11-13 15:41:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:49,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:41:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:41:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:41:49,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:41:49,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 192 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:41:49,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:49,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:41:49,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:50,142 INFO L124 PetriNetUnfolderBase]: 333/693 cut-off events. [2024-11-13 15:41:50,143 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 15:41:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274 conditions, 693 events. 333/693 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3324 event pairs, 97 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1200. Up to 324 conditions per place. [2024-11-13 15:41:50,147 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 60 selfloop transitions, 6 changer transitions 0/85 dead transitions. [2024-11-13 15:41:50,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 359 flow [2024-11-13 15:41:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:41:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:41:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-11-13 15:41:50,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-11-13 15:41:50,150 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 192 flow. Second operand 6 states and 232 transitions. [2024-11-13 15:41:50,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 359 flow [2024-11-13 15:41:50,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:41:50,152 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 210 flow [2024-11-13 15:41:50,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-11-13 15:41:50,155 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-13 15:41:50,155 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 210 flow [2024-11-13 15:41:50,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 15:41:50,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:50,156 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:50,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:41:50,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 15:41:50,357 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:50,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1638336042, now seen corresponding path program 1 times [2024-11-13 15:41:50,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:50,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418794104] [2024-11-13 15:41:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-13 15:41:50,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:50,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418794104] [2024-11-13 15:41:50,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418794104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:41:50,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:41:50,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:41:50,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672944192] [2024-11-13 15:41:50,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:50,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:41:50,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:41:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:41:50,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-13 15:41:50,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 15:41:50,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:50,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-13 15:41:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:50,715 INFO L124 PetriNetUnfolderBase]: 357/710 cut-off events. [2024-11-13 15:41:50,716 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-11-13 15:41:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452 conditions, 710 events. 357/710 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3380 event pairs, 237 based on Foata normal form. 0/659 useless extension candidates. Maximal degree in co-relation 1375. Up to 556 conditions per place. [2024-11-13 15:41:50,722 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 47 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-13 15:41:50,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 300 flow [2024-11-13 15:41:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:41:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:41:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-13 15:41:50,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-11-13 15:41:50,723 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 210 flow. Second operand 4 states and 137 transitions. [2024-11-13 15:41:50,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 300 flow [2024-11-13 15:41:50,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 15:41:50,726 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 198 flow [2024-11-13 15:41:50,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-11-13 15:41:50,729 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-13 15:41:50,729 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 198 flow [2024-11-13 15:41:50,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 15:41:50,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:50,732 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:50,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 15:41:50,732 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:50,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:50,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1638336041, now seen corresponding path program 1 times [2024-11-13 15:41:50,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:50,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856291536] [2024-11-13 15:41:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:50,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:51,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856291536] [2024-11-13 15:41:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856291536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43139546] [2024-11-13 15:41:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:51,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:51,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:51,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:41:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:51,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:41:51,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:51,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:51,585 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 15:41:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:51,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43139546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:51,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:41:51,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-13 15:41:51,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947469382] [2024-11-13 15:41:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:51,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:41:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:41:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:41:52,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 15:41:52,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 198 flow. Second operand has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 15:41:52,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:52,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 15:41:52,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:53,090 INFO L124 PetriNetUnfolderBase]: 531/1032 cut-off events. [2024-11-13 15:41:53,090 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-13 15:41:53,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1032 events. 531/1032 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4837 event pairs, 93 based on Foata normal form. 0/931 useless extension candidates. Maximal degree in co-relation 1974. Up to 364 conditions per place. [2024-11-13 15:41:53,098 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 72 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-11-13 15:41:53,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 457 flow [2024-11-13 15:41:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:41:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 15:41:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-11-13 15:41:53,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6075757575757575 [2024-11-13 15:41:53,104 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 198 flow. Second operand 10 states and 401 transitions. [2024-11-13 15:41:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 457 flow [2024-11-13 15:41:53,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:41:53,107 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 245 flow [2024-11-13 15:41:53,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=245, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-11-13 15:41:53,109 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 6 predicate places. [2024-11-13 15:41:53,109 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 245 flow [2024-11-13 15:41:53,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 15:41:53,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:53,110 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:53,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 15:41:53,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 15:41:53,315 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:53,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 711884433, now seen corresponding path program 1 times [2024-11-13 15:41:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814063647] [2024-11-13 15:41:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:53,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:53,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:53,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814063647] [2024-11-13 15:41:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814063647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:53,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641461267] [2024-11-13 15:41:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:53,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:53,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:53,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:53,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:41:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:53,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:41:53,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:54,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:54,173 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 15:41:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641461267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:41:54,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:41:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-13 15:41:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290785873] [2024-11-13 15:41:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:41:54,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:41:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:41:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:41:55,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:41:55,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 245 flow. Second operand has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 15:41:55,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:55,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:41:55,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:55,804 INFO L124 PetriNetUnfolderBase]: 1253/2486 cut-off events. [2024-11-13 15:41:55,804 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2024-11-13 15:41:55,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5071 conditions, 2486 events. 1253/2486 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14343 event pairs, 245 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 4981. Up to 760 conditions per place. [2024-11-13 15:41:55,819 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 73 selfloop transitions, 15 changer transitions 0/103 dead transitions. [2024-11-13 15:41:55,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 541 flow [2024-11-13 15:41:55,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:41:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 15:41:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 389 transitions. [2024-11-13 15:41:55,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5893939393939394 [2024-11-13 15:41:55,822 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 245 flow. Second operand 10 states and 389 transitions. [2024-11-13 15:41:55,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 541 flow [2024-11-13 15:41:55,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 103 transitions, 520 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 15:41:55,828 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 271 flow [2024-11-13 15:41:55,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=271, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-13 15:41:55,831 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-13 15:41:55,831 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 271 flow [2024-11-13 15:41:55,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states 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 15:41:55,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:55,831 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:55,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:41:56,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:56,036 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:56,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 593581456, now seen corresponding path program 1 times [2024-11-13 15:41:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:56,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874651662] [2024-11-13 15:41:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:56,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:56,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874651662] [2024-11-13 15:41:56,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874651662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:56,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652788770] [2024-11-13 15:41:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:56,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:56,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:41:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:56,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 15:41:56,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:56,627 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 15:41:56,632 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 15:41:56,724 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:41:56,724 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 15:41:56,740 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 14 treesize of output 9 [2024-11-13 15:41:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:57,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:41:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652788770] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:41:57,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 23 [2024-11-13 15:41:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167294347] [2024-11-13 15:41:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:57,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:41:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:41:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:41:58,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 15:41:58,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 15:41:58,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:58,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 15:41:58,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:58,487 INFO L124 PetriNetUnfolderBase]: 1207/2408 cut-off events. [2024-11-13 15:41:58,487 INFO L125 PetriNetUnfolderBase]: For 1132/1132 co-relation queries the response was YES. [2024-11-13 15:41:58,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5307 conditions, 2408 events. 1207/2408 cut-off events. For 1132/1132 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14010 event pairs, 395 based on Foata normal form. 0/2329 useless extension candidates. Maximal degree in co-relation 5213. Up to 1136 conditions per place. [2024-11-13 15:41:58,505 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 59 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-11-13 15:41:58,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 82 transitions, 456 flow [2024-11-13 15:41:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:41:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:41:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-11-13 15:41:58,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-11-13 15:41:58,507 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 271 flow. Second operand 6 states and 235 transitions. [2024-11-13 15:41:58,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 82 transitions, 456 flow [2024-11-13 15:41:58,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 435 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 15:41:58,513 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 277 flow [2024-11-13 15:41:58,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-13 15:41:58,513 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-13 15:41:58,514 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 277 flow [2024-11-13 15:41:58,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 15:41:58,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:58,514 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:58,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:41:58,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:58,715 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:58,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 175442111, now seen corresponding path program 1 times [2024-11-13 15:41:58,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097343869] [2024-11-13 15:41:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:41:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097343869] [2024-11-13 15:41:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097343869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:41:58,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:41:58,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:41:58,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146888747] [2024-11-13 15:41:58,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:41:58,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:41:58,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:41:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:41:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:41:58,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-13 15:41:58,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 15:41:58,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:41:58,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-13 15:41:58,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:41:59,258 INFO L124 PetriNetUnfolderBase]: 1522/3117 cut-off events. [2024-11-13 15:41:59,258 INFO L125 PetriNetUnfolderBase]: For 2580/2580 co-relation queries the response was YES. [2024-11-13 15:41:59,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7195 conditions, 3117 events. 1522/3117 cut-off events. For 2580/2580 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19746 event pairs, 795 based on Foata normal form. 68/3115 useless extension candidates. Maximal degree in co-relation 7106. Up to 1653 conditions per place. [2024-11-13 15:41:59,279 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 76 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2024-11-13 15:41:59,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 545 flow [2024-11-13 15:41:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:41:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:41:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-13 15:41:59,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2024-11-13 15:41:59,281 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 277 flow. Second operand 4 states and 195 transitions. [2024-11-13 15:41:59,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 545 flow [2024-11-13 15:41:59,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 530 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 15:41:59,291 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 283 flow [2024-11-13 15:41:59,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-13 15:41:59,292 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-13 15:41:59,292 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 283 flow [2024-11-13 15:41:59,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 15:41:59,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:41:59,292 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:41:59,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 15:41:59,293 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:41:59,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:41:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash 122277476, now seen corresponding path program 1 times [2024-11-13 15:41:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:41:59,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021328311] [2024-11-13 15:41:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:41:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:41:59,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:41:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021328311] [2024-11-13 15:41:59,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021328311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:41:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26636468] [2024-11-13 15:41:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:41:59,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:41:59,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:41:59,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:41:59,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:41:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:41:59,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 15:41:59,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:41:59,962 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 15:41:59,966 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 15:42:00,054 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:42:00,054 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 15:42:00,065 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 14 treesize of output 9 [2024-11-13 15:42:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:00,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26636468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:01,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:42:01,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2024-11-13 15:42:01,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153394056] [2024-11-13 15:42:01,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:01,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:42:01,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:01,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:42:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:42:02,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:42:02,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 283 flow. Second operand has 29 states, 29 states have (on average 28.379310344827587) internal successors, (823), 29 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 15:42:02,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:02,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:42:02,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:04,795 INFO L124 PetriNetUnfolderBase]: 3251/6194 cut-off events. [2024-11-13 15:42:04,795 INFO L125 PetriNetUnfolderBase]: For 4970/4970 co-relation queries the response was YES. [2024-11-13 15:42:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 6194 events. 3251/6194 cut-off events. For 4970/4970 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38494 event pairs, 338 based on Foata normal form. 102/6246 useless extension candidates. Maximal degree in co-relation 15028. Up to 1304 conditions per place. [2024-11-13 15:42:04,848 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 127 selfloop transitions, 17 changer transitions 0/159 dead transitions. [2024-11-13 15:42:04,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 159 transitions, 903 flow [2024-11-13 15:42:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:42:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 15:42:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 580 transitions. [2024-11-13 15:42:04,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5169340463458111 [2024-11-13 15:42:04,851 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 283 flow. Second operand 17 states and 580 transitions. [2024-11-13 15:42:04,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 159 transitions, 903 flow [2024-11-13 15:42:04,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 159 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:42:04,924 INFO L231 Difference]: Finished difference. Result has 93 places, 71 transitions, 362 flow [2024-11-13 15:42:04,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=362, PETRI_PLACES=93, PETRI_TRANSITIONS=71} [2024-11-13 15:42:04,925 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 31 predicate places. [2024-11-13 15:42:04,926 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 71 transitions, 362 flow [2024-11-13 15:42:04,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 28.379310344827587) internal successors, (823), 29 states have internal predecessors, (823), 0 states have call successors, (0), 0 states 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 15:42:04,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:04,927 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 15:42:05,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:05,128 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:05,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 430768709, now seen corresponding path program 1 times [2024-11-13 15:42:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:05,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039161861] [2024-11-13 15:42:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:05,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:05,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039161861] [2024-11-13 15:42:05,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039161861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:05,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:05,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:05,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447497064] [2024-11-13 15:42:05,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:05,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:05,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:05,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:05,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:05,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-13 15:42:05,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 71 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 15:42:05,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:05,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-13 15:42:05,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:06,197 INFO L124 PetriNetUnfolderBase]: 3888/7826 cut-off events. [2024-11-13 15:42:06,198 INFO L125 PetriNetUnfolderBase]: For 8886/8886 co-relation queries the response was YES. [2024-11-13 15:42:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19186 conditions, 7826 events. 3888/7826 cut-off events. For 8886/8886 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 57194 event pairs, 2355 based on Foata normal form. 208/7935 useless extension candidates. Maximal degree in co-relation 19082. Up to 4426 conditions per place. [2024-11-13 15:42:06,247 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 82 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-11-13 15:42:06,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 104 transitions, 737 flow [2024-11-13 15:42:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:42:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:42:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-13 15:42:06,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-11-13 15:42:06,249 INFO L175 Difference]: Start difference. First operand has 93 places, 71 transitions, 362 flow. Second operand 4 states and 192 transitions. [2024-11-13 15:42:06,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 104 transitions, 737 flow [2024-11-13 15:42:06,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 104 transitions, 730 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:42:06,265 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 374 flow [2024-11-13 15:42:06,265 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=374, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2024-11-13 15:42:06,266 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-11-13 15:42:06,266 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 374 flow [2024-11-13 15:42:06,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 15:42:06,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:06,266 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:06,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 15:42:06,267 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:06,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -202059572, now seen corresponding path program 1 times [2024-11-13 15:42:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:06,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188995283] [2024-11-13 15:42:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188995283] [2024-11-13 15:42:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188995283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:06,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:06,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646174701] [2024-11-13 15:42:06,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:06,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:06,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:06,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 374 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:06,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:06,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:06,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:07,848 INFO L124 PetriNetUnfolderBase]: 4429/9080 cut-off events. [2024-11-13 15:42:07,848 INFO L125 PetriNetUnfolderBase]: For 10603/10603 co-relation queries the response was YES. [2024-11-13 15:42:07,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23222 conditions, 9080 events. 4429/9080 cut-off events. For 10603/10603 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 67034 event pairs, 3017 based on Foata normal form. 5/8714 useless extension candidates. Maximal degree in co-relation 23116. Up to 5797 conditions per place. [2024-11-13 15:42:07,901 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 86 selfloop transitions, 5 changer transitions 2/112 dead transitions. [2024-11-13 15:42:07,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 112 transitions, 715 flow [2024-11-13 15:42:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:42:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:42:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-13 15:42:07,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.706060606060606 [2024-11-13 15:42:07,902 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 374 flow. Second operand 5 states and 233 transitions. [2024-11-13 15:42:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 112 transitions, 715 flow [2024-11-13 15:42:07,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 112 transitions, 712 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:42:07,930 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 393 flow [2024-11-13 15:42:07,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2024-11-13 15:42:07,931 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 39 predicate places. [2024-11-13 15:42:07,931 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 393 flow [2024-11-13 15:42:07,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:07,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:07,932 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:07,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 15:42:07,932 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:07,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1632160374, now seen corresponding path program 2 times [2024-11-13 15:42:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447825168] [2024-11-13 15:42:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:08,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:08,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447825168] [2024-11-13 15:42:08,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447825168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:08,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:08,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455091367] [2024-11-13 15:42:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:08,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:08,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:08,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 393 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:08,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:08,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:08,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:09,242 INFO L124 PetriNetUnfolderBase]: 4674/9565 cut-off events. [2024-11-13 15:42:09,242 INFO L125 PetriNetUnfolderBase]: For 12293/12293 co-relation queries the response was YES. [2024-11-13 15:42:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24845 conditions, 9565 events. 4674/9565 cut-off events. For 12293/12293 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 72845 event pairs, 2661 based on Foata normal form. 4/9149 useless extension candidates. Maximal degree in co-relation 24735. Up to 4790 conditions per place. [2024-11-13 15:42:09,288 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 91 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-13 15:42:09,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 115 transitions, 827 flow [2024-11-13 15:42:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:42:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:42:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-11-13 15:42:09,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.693939393939394 [2024-11-13 15:42:09,289 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 393 flow. Second operand 5 states and 229 transitions. [2024-11-13 15:42:09,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 115 transitions, 827 flow [2024-11-13 15:42:09,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 115 transitions, 813 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:42:09,321 INFO L231 Difference]: Finished difference. Result has 104 places, 74 transitions, 405 flow [2024-11-13 15:42:09,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=405, PETRI_PLACES=104, PETRI_TRANSITIONS=74} [2024-11-13 15:42:09,322 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 42 predicate places. [2024-11-13 15:42:09,322 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 74 transitions, 405 flow [2024-11-13 15:42:09,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:09,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:09,323 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:09,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-13 15:42:09,323 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:09,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:09,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1713970586, now seen corresponding path program 3 times [2024-11-13 15:42:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:09,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571085093] [2024-11-13 15:42:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:09,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:09,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571085093] [2024-11-13 15:42:09,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571085093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:09,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:09,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539667547] [2024-11-13 15:42:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:09,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:09,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:09,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:09,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 74 transitions, 405 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:09,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:09,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:09,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:11,024 INFO L124 PetriNetUnfolderBase]: 4716/9662 cut-off events. [2024-11-13 15:42:11,024 INFO L125 PetriNetUnfolderBase]: For 14279/14279 co-relation queries the response was YES. [2024-11-13 15:42:11,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26013 conditions, 9662 events. 4716/9662 cut-off events. For 14279/14279 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 72811 event pairs, 3257 based on Foata normal form. 50/9594 useless extension candidates. Maximal degree in co-relation 25901. Up to 6189 conditions per place. [2024-11-13 15:42:11,063 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 94 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-11-13 15:42:11,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 117 transitions, 795 flow [2024-11-13 15:42:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:42:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:42:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-11-13 15:42:11,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7651515151515151 [2024-11-13 15:42:11,065 INFO L175 Difference]: Start difference. First operand has 104 places, 74 transitions, 405 flow. Second operand 4 states and 202 transitions. [2024-11-13 15:42:11,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 117 transitions, 795 flow [2024-11-13 15:42:11,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 779 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:42:11,083 INFO L231 Difference]: Finished difference. Result has 106 places, 76 transitions, 431 flow [2024-11-13 15:42:11,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=431, PETRI_PLACES=106, PETRI_TRANSITIONS=76} [2024-11-13 15:42:11,083 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2024-11-13 15:42:11,084 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 76 transitions, 431 flow [2024-11-13 15:42:11,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:11,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:11,084 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:11,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 15:42:11,084 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:11,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1980305198, now seen corresponding path program 4 times [2024-11-13 15:42:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058845258] [2024-11-13 15:42:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:11,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:11,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058845258] [2024-11-13 15:42:11,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058845258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:11,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:11,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087697234] [2024-11-13 15:42:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:11,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:11,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:11,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 76 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:11,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:11,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:11,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:12,945 INFO L124 PetriNetUnfolderBase]: 5241/10653 cut-off events. [2024-11-13 15:42:12,945 INFO L125 PetriNetUnfolderBase]: For 16381/16381 co-relation queries the response was YES. [2024-11-13 15:42:12,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29234 conditions, 10653 events. 5241/10653 cut-off events. For 16381/16381 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 82963 event pairs, 2749 based on Foata normal form. 50/10579 useless extension candidates. Maximal degree in co-relation 29122. Up to 7584 conditions per place. [2024-11-13 15:42:12,996 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 78 selfloop transitions, 5 changer transitions 3/105 dead transitions. [2024-11-13 15:42:12,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 105 transitions, 752 flow [2024-11-13 15:42:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:42:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:42:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-13 15:42:12,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7234848484848485 [2024-11-13 15:42:12,997 INFO L175 Difference]: Start difference. First operand has 106 places, 76 transitions, 431 flow. Second operand 4 states and 191 transitions. [2024-11-13 15:42:12,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 105 transitions, 752 flow [2024-11-13 15:42:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 105 transitions, 744 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-13 15:42:13,028 INFO L231 Difference]: Finished difference. Result has 111 places, 79 transitions, 497 flow [2024-11-13 15:42:13,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=111, PETRI_TRANSITIONS=79} [2024-11-13 15:42:13,029 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 49 predicate places. [2024-11-13 15:42:13,029 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 79 transitions, 497 flow [2024-11-13 15:42:13,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 15:42:13,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:13,029 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:13,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 15:42:13,029 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:13,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1497702816, now seen corresponding path program 1 times [2024-11-13 15:42:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:13,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427037715] [2024-11-13 15:42:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427037715] [2024-11-13 15:42:13,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427037715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:42:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447318090] [2024-11-13 15:42:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:13,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:42:13,425 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:42:13,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:42:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:13,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 15:42:13,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:42:13,750 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 15:42:13,755 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 15:42:13,844 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:42:13,844 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 14 treesize of output 13 [2024-11-13 15:42:13,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:42:13,868 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 15:42:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:14,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:14,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447318090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:14,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:42:14,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-13 15:42:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745719275] [2024-11-13 15:42:14,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:14,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:42:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:42:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:42:16,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-13 15:42:16,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 79 transitions, 497 flow. Second operand has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 15:42:16,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:16,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-13 15:42:16,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:19,425 INFO L124 PetriNetUnfolderBase]: 9535/19487 cut-off events. [2024-11-13 15:42:19,425 INFO L125 PetriNetUnfolderBase]: For 32372/32374 co-relation queries the response was YES. [2024-11-13 15:42:19,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52800 conditions, 19487 events. 9535/19487 cut-off events. For 32372/32374 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 160301 event pairs, 1612 based on Foata normal form. 380/19745 useless extension candidates. Maximal degree in co-relation 52686. Up to 3858 conditions per place. [2024-11-13 15:42:19,521 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 136 selfloop transitions, 19 changer transitions 0/174 dead transitions. [2024-11-13 15:42:19,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 174 transitions, 1466 flow [2024-11-13 15:42:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:42:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 15:42:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 585 transitions. [2024-11-13 15:42:19,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-11-13 15:42:19,523 INFO L175 Difference]: Start difference. First operand has 111 places, 79 transitions, 497 flow. Second operand 17 states and 585 transitions. [2024-11-13 15:42:19,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 174 transitions, 1466 flow [2024-11-13 15:42:19,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 174 transitions, 1435 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-13 15:42:19,568 INFO L231 Difference]: Finished difference. Result has 127 places, 82 transitions, 572 flow [2024-11-13 15:42:19,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=572, PETRI_PLACES=127, PETRI_TRANSITIONS=82} [2024-11-13 15:42:19,568 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 65 predicate places. [2024-11-13 15:42:19,568 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 82 transitions, 572 flow [2024-11-13 15:42:19,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 15:42:19,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:19,569 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:42:19,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 15:42:19,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:19,773 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:19,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1773103270, now seen corresponding path program 1 times [2024-11-13 15:42:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427915973] [2024-11-13 15:42:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427915973] [2024-11-13 15:42:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427915973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:19,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721296703] [2024-11-13 15:42:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:19,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:19,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:19,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 82 transitions, 572 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:42:19,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:19,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:19,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:23,249 INFO L124 PetriNetUnfolderBase]: 10752/22269 cut-off events. [2024-11-13 15:42:23,250 INFO L125 PetriNetUnfolderBase]: For 41673/41673 co-relation queries the response was YES. [2024-11-13 15:42:23,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61963 conditions, 22269 events. 10752/22269 cut-off events. For 41673/41673 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 194258 event pairs, 5831 based on Foata normal form. 104/22193 useless extension candidates. Maximal degree in co-relation 61835. Up to 15908 conditions per place. [2024-11-13 15:42:23,372 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 82 selfloop transitions, 6 changer transitions 2/112 dead transitions. [2024-11-13 15:42:23,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 112 transitions, 920 flow [2024-11-13 15:42:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:42:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:42:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-11-13 15:42:23,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2024-11-13 15:42:23,373 INFO L175 Difference]: Start difference. First operand has 127 places, 82 transitions, 572 flow. Second operand 4 states and 190 transitions. [2024-11-13 15:42:23,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 112 transitions, 920 flow [2024-11-13 15:42:23,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 112 transitions, 894 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-13 15:42:23,426 INFO L231 Difference]: Finished difference. Result has 120 places, 85 transitions, 608 flow [2024-11-13 15:42:23,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=608, PETRI_PLACES=120, PETRI_TRANSITIONS=85} [2024-11-13 15:42:23,427 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2024-11-13 15:42:23,427 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 85 transitions, 608 flow [2024-11-13 15:42:23,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:42:23,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:23,427 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:42:23,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 15:42:23,427 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:23,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash -836287648, now seen corresponding path program 2 times [2024-11-13 15:42:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435481296] [2024-11-13 15:42:23,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:23,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:23,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435481296] [2024-11-13 15:42:23,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435481296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:23,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:23,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:42:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674623811] [2024-11-13 15:42:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:23,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:42:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:42:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:42:23,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-13 15:42:23,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 85 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:42:23,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:23,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-13 15:42:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:26,439 INFO L124 PetriNetUnfolderBase]: 10458/21708 cut-off events. [2024-11-13 15:42:26,440 INFO L125 PetriNetUnfolderBase]: For 44953/44955 co-relation queries the response was YES. [2024-11-13 15:42:26,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61506 conditions, 21708 events. 10458/21708 cut-off events. For 44953/44955 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 186822 event pairs, 7985 based on Foata normal form. 104/21671 useless extension candidates. Maximal degree in co-relation 61387. Up to 12955 conditions per place. [2024-11-13 15:42:26,565 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 92 selfloop transitions, 8 changer transitions 2/124 dead transitions. [2024-11-13 15:42:26,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 124 transitions, 1066 flow [2024-11-13 15:42:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:42:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:42:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-13 15:42:26,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-11-13 15:42:26,566 INFO L175 Difference]: Start difference. First operand has 120 places, 85 transitions, 608 flow. Second operand 4 states and 196 transitions. [2024-11-13 15:42:26,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 124 transitions, 1066 flow [2024-11-13 15:42:26,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 1060 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-13 15:42:26,633 INFO L231 Difference]: Finished difference. Result has 124 places, 85 transitions, 624 flow [2024-11-13 15:42:26,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=624, PETRI_PLACES=124, PETRI_TRANSITIONS=85} [2024-11-13 15:42:26,634 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 62 predicate places. [2024-11-13 15:42:26,634 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 85 transitions, 624 flow [2024-11-13 15:42:26,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:42:26,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:26,635 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:26,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 15:42:26,635 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:26,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1707457223, now seen corresponding path program 1 times [2024-11-13 15:42:26,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132558391] [2024-11-13 15:42:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:26,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:27,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:27,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132558391] [2024-11-13 15:42:27,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132558391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:42:27,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530530098] [2024-11-13 15:42:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:27,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:27,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:42:27,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:42:27,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:42:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:27,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 15:42:27,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:42:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:27,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:27,604 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 15:42:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530530098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:27,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:42:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-13 15:42:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095553222] [2024-11-13 15:42:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:27,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:42:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:42:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:42:29,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 15:42:29,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 85 transitions, 624 flow. Second operand has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 15:42:29,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:29,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 15:42:29,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:33,306 INFO L124 PetriNetUnfolderBase]: 12582/25512 cut-off events. [2024-11-13 15:42:33,306 INFO L125 PetriNetUnfolderBase]: For 57986/57987 co-relation queries the response was YES. [2024-11-13 15:42:33,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73125 conditions, 25512 events. 12582/25512 cut-off events. For 57986/57987 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 216613 event pairs, 2191 based on Foata normal form. 342/25705 useless extension candidates. Maximal degree in co-relation 73004. Up to 5091 conditions per place. [2024-11-13 15:42:33,463 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 171 selfloop transitions, 21 changer transitions 0/214 dead transitions. [2024-11-13 15:42:33,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 214 transitions, 1858 flow [2024-11-13 15:42:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:42:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 15:42:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 558 transitions. [2024-11-13 15:42:33,465 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6503496503496503 [2024-11-13 15:42:33,465 INFO L175 Difference]: Start difference. First operand has 124 places, 85 transitions, 624 flow. Second operand 13 states and 558 transitions. [2024-11-13 15:42:33,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 214 transitions, 1858 flow [2024-11-13 15:42:33,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 214 transitions, 1816 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-13 15:42:33,523 INFO L231 Difference]: Finished difference. Result has 136 places, 87 transitions, 696 flow [2024-11-13 15:42:33,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=696, PETRI_PLACES=136, PETRI_TRANSITIONS=87} [2024-11-13 15:42:33,523 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 74 predicate places. [2024-11-13 15:42:33,524 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 87 transitions, 696 flow [2024-11-13 15:42:33,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states 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 15:42:33,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:33,524 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:42:33,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 15:42:33,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:33,728 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:33,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -999656847, now seen corresponding path program 1 times [2024-11-13 15:42:33,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:33,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054681652] [2024-11-13 15:42:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:34,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:34,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054681652] [2024-11-13 15:42:34,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054681652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:42:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48294694] [2024-11-13 15:42:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:34,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:42:34,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:42:34,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:42:34,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:42:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:34,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 15:42:34,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:42:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:34,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:42:34,796 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 15:42:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:42:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48294694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:42:34,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:42:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-13 15:42:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757655455] [2024-11-13 15:42:34,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:42:34,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:42:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:42:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:42:36,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:42:36,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 87 transitions, 696 flow. Second operand has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 15:42:36,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:36,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:42:36,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:41,033 INFO L124 PetriNetUnfolderBase]: 16365/31970 cut-off events. [2024-11-13 15:42:41,034 INFO L125 PetriNetUnfolderBase]: For 80215/80217 co-relation queries the response was YES. [2024-11-13 15:42:41,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93253 conditions, 31970 events. 16365/31970 cut-off events. For 80215/80217 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 268451 event pairs, 2250 based on Foata normal form. 454/32352 useless extension candidates. Maximal degree in co-relation 93118. Up to 6869 conditions per place. [2024-11-13 15:42:41,258 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 172 selfloop transitions, 21 changer transitions 0/215 dead transitions. [2024-11-13 15:42:41,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 215 transitions, 2070 flow [2024-11-13 15:42:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:42:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 15:42:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 540 transitions. [2024-11-13 15:42:41,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6293706293706294 [2024-11-13 15:42:41,260 INFO L175 Difference]: Start difference. First operand has 136 places, 87 transitions, 696 flow. Second operand 13 states and 540 transitions. [2024-11-13 15:42:41,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 215 transitions, 2070 flow [2024-11-13 15:42:41,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 215 transitions, 1999 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-13 15:42:41,381 INFO L231 Difference]: Finished difference. Result has 143 places, 89 transitions, 749 flow [2024-11-13 15:42:41,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=749, PETRI_PLACES=143, PETRI_TRANSITIONS=89} [2024-11-13 15:42:41,382 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 81 predicate places. [2024-11-13 15:42:41,382 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 89 transitions, 749 flow [2024-11-13 15:42:41,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 15:42:41,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:41,382 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:42:41,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 15:42:41,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f36d962-8521-4fc3-90c5-36e5e7818810/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 15:42:41,583 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:41,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:41,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1769803364, now seen corresponding path program 1 times [2024-11-13 15:42:41,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:41,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677616805] [2024-11-13 15:42:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:42,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:42,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677616805] [2024-11-13 15:42:42,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677616805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:42,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:42,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:42:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195410349] [2024-11-13 15:42:42,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:42,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:42:42,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:42:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:42:42,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:42:42,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 89 transitions, 749 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:42:42,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:42,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:42:42,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:48,333 INFO L124 PetriNetUnfolderBase]: 19346/37465 cut-off events. [2024-11-13 15:42:48,333 INFO L125 PetriNetUnfolderBase]: For 108527/108760 co-relation queries the response was YES. [2024-11-13 15:42:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114128 conditions, 37465 events. 19346/37465 cut-off events. For 108527/108760 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 313310 event pairs, 14688 based on Foata normal form. 9/37443 useless extension candidates. Maximal degree in co-relation 113988. Up to 25149 conditions per place. [2024-11-13 15:42:48,627 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 213 selfloop transitions, 25 changer transitions 0/253 dead transitions. [2024-11-13 15:42:48,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 253 transitions, 2439 flow [2024-11-13 15:42:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:42:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 15:42:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 602 transitions. [2024-11-13 15:42:48,631 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6080808080808081 [2024-11-13 15:42:48,631 INFO L175 Difference]: Start difference. First operand has 143 places, 89 transitions, 749 flow. Second operand 15 states and 602 transitions. [2024-11-13 15:42:48,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 253 transitions, 2439 flow [2024-11-13 15:42:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 253 transitions, 2364 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-13 15:42:48,803 INFO L231 Difference]: Finished difference. Result has 158 places, 106 transitions, 972 flow [2024-11-13 15:42:48,803 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=972, PETRI_PLACES=158, PETRI_TRANSITIONS=106} [2024-11-13 15:42:48,803 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 96 predicate places. [2024-11-13 15:42:48,803 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 106 transitions, 972 flow [2024-11-13 15:42:48,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:42:48,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:48,804 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:42:48,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-13 15:42:48,804 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:48,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash -198544618, now seen corresponding path program 2 times [2024-11-13 15:42:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88862271] [2024-11-13 15:42:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88862271] [2024-11-13 15:42:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88862271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:49,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:42:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624031584] [2024-11-13 15:42:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:49,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:42:49,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:42:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:42:49,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:42:49,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 106 transitions, 972 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:42:49,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:49,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:42:49,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:42:55,843 INFO L124 PetriNetUnfolderBase]: 19445/37788 cut-off events. [2024-11-13 15:42:55,843 INFO L125 PetriNetUnfolderBase]: For 132812/133025 co-relation queries the response was YES. [2024-11-13 15:42:56,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126183 conditions, 37788 events. 19445/37788 cut-off events. For 132812/133025 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 315902 event pairs, 15085 based on Foata normal form. 8/37769 useless extension candidates. Maximal degree in co-relation 126041. Up to 25332 conditions per place. [2024-11-13 15:42:56,157 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 167 selfloop transitions, 38 changer transitions 0/220 dead transitions. [2024-11-13 15:42:56,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 220 transitions, 2085 flow [2024-11-13 15:42:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:42:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 15:42:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 561 transitions. [2024-11-13 15:42:56,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-13 15:42:56,159 INFO L175 Difference]: Start difference. First operand has 158 places, 106 transitions, 972 flow. Second operand 14 states and 561 transitions. [2024-11-13 15:42:56,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 220 transitions, 2085 flow [2024-11-13 15:42:56,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 220 transitions, 1983 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-11-13 15:42:56,755 INFO L231 Difference]: Finished difference. Result has 178 places, 127 transitions, 1303 flow [2024-11-13 15:42:56,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1303, PETRI_PLACES=178, PETRI_TRANSITIONS=127} [2024-11-13 15:42:56,755 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 116 predicate places. [2024-11-13 15:42:56,755 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 127 transitions, 1303 flow [2024-11-13 15:42:56,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:42:56,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:42:56,756 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:42:56,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-13 15:42:56,756 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:42:56,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:42:56,757 INFO L85 PathProgramCache]: Analyzing trace with hash 650713920, now seen corresponding path program 3 times [2024-11-13 15:42:56,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:42:56,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873673903] [2024-11-13 15:42:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:42:56,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:42:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:42:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:42:57,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873673903] [2024-11-13 15:42:57,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873673903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:42:57,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:42:57,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:42:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231477366] [2024-11-13 15:42:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:42:57,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:42:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:42:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:42:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:42:57,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 15:42:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 127 transitions, 1303 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:42:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:42:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 15:42:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:43:04,528 INFO L124 PetriNetUnfolderBase]: 19687/38464 cut-off events. [2024-11-13 15:43:04,529 INFO L125 PetriNetUnfolderBase]: For 151478/151655 co-relation queries the response was YES. [2024-11-13 15:43:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133176 conditions, 38464 events. 19687/38464 cut-off events. For 151478/151655 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 323062 event pairs, 15226 based on Foata normal form. 9/38442 useless extension candidates. Maximal degree in co-relation 133024. Up to 25332 conditions per place. [2024-11-13 15:43:04,930 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 209 selfloop transitions, 42 changer transitions 0/266 dead transitions. [2024-11-13 15:43:04,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 266 transitions, 3010 flow [2024-11-13 15:43:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:43:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 15:43:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 560 transitions. [2024-11-13 15:43:04,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-13 15:43:04,932 INFO L175 Difference]: Start difference. First operand has 178 places, 127 transitions, 1303 flow. Second operand 14 states and 560 transitions. [2024-11-13 15:43:04,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 266 transitions, 3010 flow [2024-11-13 15:43:05,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 266 transitions, 2873 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-11-13 15:43:05,379 INFO L231 Difference]: Finished difference. Result has 197 places, 142 transitions, 1624 flow [2024-11-13 15:43:05,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1624, PETRI_PLACES=197, PETRI_TRANSITIONS=142} [2024-11-13 15:43:05,380 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 135 predicate places. [2024-11-13 15:43:05,380 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 142 transitions, 1624 flow [2024-11-13 15:43:05,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 15:43:05,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:43:05,381 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 15:43:05,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 15:43:05,381 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 15:43:05,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:43:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -819364806, now seen corresponding path program 4 times [2024-11-13 15:43:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:43:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156182223] [2024-11-13 15:43:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:43:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:43:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:43:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-13 15:43:06,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:43:06,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156182223] [2024-11-13 15:43:06,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156182223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:43:06,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:43:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:43:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696343181] [2024-11-13 15:43:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:43:06,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:43:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:43:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:43:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:43:06,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-13 15:43:06,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 142 transitions, 1624 flow. Second operand has 12 states, 12 states have (on average 31.333333333333332) internal successors, (376), 12 states have internal predecessors, (376), 0 states have call successors, (0), 0 states 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 15:43:06,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:43:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-13 15:43:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand