./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya --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 e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:32:00,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:32:00,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:32:00,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:32:00,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:32:00,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:32:00,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:32:00,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:32:00,893 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:32:00,893 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:32:00,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:32:00,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:32:00,895 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:32:00,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:32:00,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:32:00,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:32:00,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:32:00,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:32:00,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:32:00,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:32:00,899 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:32:00,904 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:32:00,904 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:32:00,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:32:00,905 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:32:00,905 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:32:00,906 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:32:00,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:32:00,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:32:00,907 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:32:00,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:32:00,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:32:00,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:32:00,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:32:00,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:32:00,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:32:00,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:32:00,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:32:00,909 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:32:00,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:32:00,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:32:00,910 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2023-11-29 06:32:01,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:32:01,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:32:01,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:32:01,171 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:32:01,171 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:32:01,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-29 06:32:04,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:32:04,288 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:32:04,289 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2023-11-29 06:32:04,311 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/data/d3a0b88a6/c6a5b753abcf487caa6ede9ff720b68e/FLAG19a9fcd5d [2023-11-29 06:32:04,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/data/d3a0b88a6/c6a5b753abcf487caa6ede9ff720b68e [2023-11-29 06:32:04,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:32:04,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:32:04,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:32:04,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:32:04,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:32:04,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:32:04" (1/1) ... [2023-11-29 06:32:04,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a43ff24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:04, skipping insertion in model container [2023-11-29 06:32:04,338 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:32:04" (1/1) ... [2023-11-29 06:32:04,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:32:04,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:32:04,948 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:32:05,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:32:05,127 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:32:05,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05 WrapperNode [2023-11-29 06:32:05,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:32:05,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:32:05,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:32:05,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:32:05,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,191 INFO L138 Inliner]: procedures = 371, calls = 31, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 131 [2023-11-29 06:32:05,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:32:05,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:32:05,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:32:05,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:32:05,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,235 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [6, 14, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 14 writes are split as follows [3, 10, 1]. [2023-11-29 06:32:05,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:32:05,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:32:05,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:32:05,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:32:05,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (1/1) ... [2023-11-29 06:32:05,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:32:05,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:05,303 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:32:05,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:32:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:32:05,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 06:32:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 06:32:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 06:32:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:32:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 06:32:05,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:32:05,343 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 06:32:05,344 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 06:32:05,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 06:32:05,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:32:05,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:32:05,347 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:32:05,510 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:32:05,512 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:32:05,859 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:32:06,025 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:32:06,025 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:32:06,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:32:06 BoogieIcfgContainer [2023-11-29 06:32:06,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:32:06,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:32:06,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:32:06,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:32:06,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:32:04" (1/3) ... [2023-11-29 06:32:06,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8f7170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:32:06, skipping insertion in model container [2023-11-29 06:32:06,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:32:05" (2/3) ... [2023-11-29 06:32:06,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8f7170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:32:06, skipping insertion in model container [2023-11-29 06:32:06,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:32:06" (3/3) ... [2023-11-29 06:32:06,035 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2023-11-29 06:32:06,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:32:06,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-29 06:32:06,056 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:32:06,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 06:32:06,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 76 transitions, 156 flow [2023-11-29 06:32:06,195 INFO L124 PetriNetUnfolderBase]: 2/75 cut-off events. [2023-11-29 06:32:06,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:32:06,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 75 events. 2/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 267 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 06:32:06,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 76 transitions, 156 flow [2023-11-29 06:32:06,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 75 transitions, 153 flow [2023-11-29 06:32:06,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:32:06,221 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@2e902b8e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:32:06,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-29 06:32:06,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:32:06,226 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-29 06:32:06,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:32:06,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:06,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 06:32:06,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:06,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash 12863242, now seen corresponding path program 1 times [2023-11-29 06:32:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476936747] [2023-11-29 06:32:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476936747] [2023-11-29 06:32:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476936747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:06,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:32:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997308457] [2023-11-29 06:32:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:06,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:32:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:32:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:32:06,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:06,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:06,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:06,670 INFO L124 PetriNetUnfolderBase]: 65/272 cut-off events. [2023-11-29 06:32:06,670 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 06:32:06,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 272 events. 65/272 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1375 event pairs, 63 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 377. Up to 155 conditions per place. [2023-11-29 06:32:06,676 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-29 06:32:06,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 213 flow [2023-11-29 06:32:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:32:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:32:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2023-11-29 06:32:06,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7631578947368421 [2023-11-29 06:32:06,690 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 174 transitions. [2023-11-29 06:32:06,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 174 transitions. [2023-11-29 06:32:06,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:06,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 174 transitions. [2023-11-29 06:32:06,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,704 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 153 flow. Second operand 3 states and 174 transitions. [2023-11-29 06:32:06,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 213 flow [2023-11-29 06:32:06,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:32:06,712 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 164 flow [2023-11-29 06:32:06,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2023-11-29 06:32:06,718 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2023-11-29 06:32:06,718 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 164 flow [2023-11-29 06:32:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:06,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:06,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:32:06,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:32:06,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:06,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 398746065, now seen corresponding path program 1 times [2023-11-29 06:32:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:06,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125135380] [2023-11-29 06:32:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:06,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:06,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125135380] [2023-11-29 06:32:06,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125135380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467694791] [2023-11-29 06:32:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:06,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:06,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:06,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:06,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:32:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:06,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:32:06,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:06,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467694791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:06,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 06:32:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730495074] [2023-11-29 06:32:07,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:32:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:32:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:32:07,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:07,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:07,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:07,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:07,154 INFO L124 PetriNetUnfolderBase]: 65/275 cut-off events. [2023-11-29 06:32:07,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:32:07,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 275 events. 65/275 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1375 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 436. Up to 155 conditions per place. [2023-11-29 06:32:07,159 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-29 06:32:07,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 79 transitions, 240 flow [2023-11-29 06:32:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:32:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:32:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2023-11-29 06:32:07,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-11-29 06:32:07,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 323 transitions. [2023-11-29 06:32:07,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 323 transitions. [2023-11-29 06:32:07,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:07,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 323 transitions. [2023-11-29 06:32:07,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.833333333333336) internal successors, (323), 6 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,171 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,171 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 164 flow. Second operand 6 states and 323 transitions. [2023-11-29 06:32:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 79 transitions, 240 flow [2023-11-29 06:32:07,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 236 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:32:07,175 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 196 flow [2023-11-29 06:32:07,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-11-29 06:32:07,176 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2023-11-29 06:32:07,177 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 196 flow [2023-11-29 06:32:07,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.166666666666664) internal successors, (295), 6 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:07,177 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-29 06:32:07,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:32:07,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 06:32:07,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:07,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash -849854262, now seen corresponding path program 2 times [2023-11-29 06:32:07,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:07,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078599882] [2023-11-29 06:32:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:32:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078599882] [2023-11-29 06:32:07,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078599882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:07,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:07,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:32:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911906979] [2023-11-29 06:32:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:07,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:32:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:32:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:32:07,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 76 [2023-11-29 06:32:07,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 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) [2023-11-29 06:32:07,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:07,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 76 [2023-11-29 06:32:07,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:07,676 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2023-11-29 06:32:07,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:32:07,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 271 events. 65/271 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1349 event pairs, 63 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 425. Up to 157 conditions per place. [2023-11-29 06:32:07,680 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 30 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-29 06:32:07,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 256 flow [2023-11-29 06:32:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:32:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:32:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-29 06:32:07,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2023-11-29 06:32:07,682 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-29 06:32:07,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-29 06:32:07,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:07,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-29 06:32:07,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,685 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 196 flow. Second operand 3 states and 160 transitions. [2023-11-29 06:32:07,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 256 flow [2023-11-29 06:32:07,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 06:32:07,690 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 182 flow [2023-11-29 06:32:07,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-29 06:32:07,691 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2023-11-29 06:32:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 182 flow [2023-11-29 06:32:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 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) [2023-11-29 06:32:07,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:07,692 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-29 06:32:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:32:07,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:07,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash -849854261, now seen corresponding path program 1 times [2023-11-29 06:32:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456930998] [2023-11-29 06:32:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:07,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:07,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456930998] [2023-11-29 06:32:07,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456930998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:07,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445285444] [2023-11-29 06:32:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:07,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:07,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:07,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:32:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:07,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:32:07,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:07,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445285444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:08,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:08,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 06:32:08,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173759038] [2023-11-29 06:32:08,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:32:08,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:08,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:32:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:32:08,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:08,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:08,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:08,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:08,200 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2023-11-29 06:32:08,200 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 06:32:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 277 events. 65/277 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1367 event pairs, 63 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 435. Up to 155 conditions per place. [2023-11-29 06:32:08,203 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 27 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-11-29 06:32:08,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 81 transitions, 294 flow [2023-11-29 06:32:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:32:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:32:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 620 transitions. [2023-11-29 06:32:08,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6798245614035088 [2023-11-29 06:32:08,208 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 620 transitions. [2023-11-29 06:32:08,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 620 transitions. [2023-11-29 06:32:08,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:08,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 620 transitions. [2023-11-29 06:32:08,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.666666666666664) internal successors, (620), 12 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,215 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,215 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 182 flow. Second operand 12 states and 620 transitions. [2023-11-29 06:32:08,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 81 transitions, 294 flow [2023-11-29 06:32:08,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:32:08,220 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 258 flow [2023-11-29 06:32:08,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=258, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-11-29 06:32:08,221 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-29 06:32:08,222 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 258 flow [2023-11-29 06:32:08,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.15384615384615) internal successors, (639), 13 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:08,223 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-29 06:32:08,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:32:08,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:08,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:08,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1189467056, now seen corresponding path program 1 times [2023-11-29 06:32:08,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:08,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895984839] [2023-11-29 06:32:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:08,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895984839] [2023-11-29 06:32:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895984839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:32:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284710539] [2023-11-29 06:32:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:08,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:32:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:32:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:32:08,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:08,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 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) [2023-11-29 06:32:08,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:08,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:08,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:08,635 INFO L124 PetriNetUnfolderBase]: 65/301 cut-off events. [2023-11-29 06:32:08,635 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 06:32:08,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 301 events. 65/301 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1376 event pairs, 63 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 460. Up to 165 conditions per place. [2023-11-29 06:32:08,639 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 43 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-11-29 06:32:08,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 88 transitions, 362 flow [2023-11-29 06:32:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:32:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:32:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-11-29 06:32:08,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7894736842105263 [2023-11-29 06:32:08,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-11-29 06:32:08,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-11-29 06:32:08,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:08,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-11-29 06:32:08,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,643 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 258 flow. Second operand 3 states and 180 transitions. [2023-11-29 06:32:08,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 88 transitions, 362 flow [2023-11-29 06:32:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 88 transitions, 314 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-29 06:32:08,650 INFO L231 Difference]: Finished difference. Result has 96 places, 82 transitions, 222 flow [2023-11-29 06:32:08,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2023-11-29 06:32:08,651 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 19 predicate places. [2023-11-29 06:32:08,651 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 222 flow [2023-11-29 06:32:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 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) [2023-11-29 06:32:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:08,652 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-29 06:32:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:32:08,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:08,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1189466987, now seen corresponding path program 2 times [2023-11-29 06:32:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000858656] [2023-11-29 06:32:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:08,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000858656] [2023-11-29 06:32:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000858656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:08,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:32:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876217700] [2023-11-29 06:32:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:08,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:32:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:32:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:32:08,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 76 [2023-11-29 06:32:08,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-11-29 06:32:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 76 [2023-11-29 06:32:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:08,968 INFO L124 PetriNetUnfolderBase]: 65/293 cut-off events. [2023-11-29 06:32:08,968 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-29 06:32:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 293 events. 65/293 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1334 event pairs, 63 based on Foata normal form. 4/234 useless extension candidates. Maximal degree in co-relation 457. Up to 168 conditions per place. [2023-11-29 06:32:08,971 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 35 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-11-29 06:32:08,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 78 transitions, 292 flow [2023-11-29 06:32:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:32:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:32:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-11-29 06:32:08,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7192982456140351 [2023-11-29 06:32:08,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-11-29 06:32:08,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-11-29 06:32:08,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:08,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-11-29 06:32:08,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:08,976 INFO L175 Difference]: Start difference. First operand has 96 places, 82 transitions, 222 flow. Second operand 3 states and 164 transitions. [2023-11-29 06:32:08,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 78 transitions, 292 flow [2023-11-29 06:32:08,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 78 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:32:08,980 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 220 flow [2023-11-29 06:32:08,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2023-11-29 06:32:08,981 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-29 06:32:08,981 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 220 flow [2023-11-29 06:32:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-11-29 06:32:08,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:08,981 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:08,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:32:08,982 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:08,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash 616484454, now seen corresponding path program 1 times [2023-11-29 06:32:08,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:08,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577730416] [2023-11-29 06:32:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:09,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:09,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577730416] [2023-11-29 06:32:09,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577730416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:09,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:32:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940905540] [2023-11-29 06:32:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:09,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:32:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:32:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:32:09,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-29 06:32:09,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:09,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:09,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-29 06:32:09,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:09,504 INFO L124 PetriNetUnfolderBase]: 75/314 cut-off events. [2023-11-29 06:32:09,504 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 06:32:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 314 events. 75/314 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1446 event pairs, 55 based on Foata normal form. 2/259 useless extension candidates. Maximal degree in co-relation 511. Up to 156 conditions per place. [2023-11-29 06:32:09,507 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 50 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-29 06:32:09,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 336 flow [2023-11-29 06:32:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:32:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:32:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-29 06:32:09,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7368421052631579 [2023-11-29 06:32:09,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-29 06:32:09,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-29 06:32:09,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:09,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-29 06:32:09,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:09,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:09,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:09,511 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 220 flow. Second operand 3 states and 168 transitions. [2023-11-29 06:32:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 336 flow [2023-11-29 06:32:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:32:09,515 INFO L231 Difference]: Finished difference. Result has 91 places, 75 transitions, 214 flow [2023-11-29 06:32:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2023-11-29 06:32:09,516 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 14 predicate places. [2023-11-29 06:32:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 214 flow [2023-11-29 06:32:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:09,516 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:09,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:32:09,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 616484455, now seen corresponding path program 1 times [2023-11-29 06:32:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208848414] [2023-11-29 06:32:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:09,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:09,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208848414] [2023-11-29 06:32:09,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208848414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:09,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:09,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:32:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814892446] [2023-11-29 06:32:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:09,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:32:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:32:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:32:10,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 76 [2023-11-29 06:32:10,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 76 [2023-11-29 06:32:10,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:10,357 INFO L124 PetriNetUnfolderBase]: 65/281 cut-off events. [2023-11-29 06:32:10,357 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-11-29 06:32:10,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 281 events. 65/281 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1264 event pairs, 63 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 467. Up to 155 conditions per place. [2023-11-29 06:32:10,360 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 42 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-11-29 06:32:10,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 81 transitions, 320 flow [2023-11-29 06:32:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:32:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:32:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 315 transitions. [2023-11-29 06:32:10,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6907894736842105 [2023-11-29 06:32:10,362 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 315 transitions. [2023-11-29 06:32:10,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 315 transitions. [2023-11-29 06:32:10,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:10,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 315 transitions. [2023-11-29 06:32:10,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:10,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:10,366 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:10,366 INFO L175 Difference]: Start difference. First operand has 91 places, 75 transitions, 214 flow. Second operand 6 states and 315 transitions. [2023-11-29 06:32:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 81 transitions, 320 flow [2023-11-29 06:32:10,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 81 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:32:10,369 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 238 flow [2023-11-29 06:32:10,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2023-11-29 06:32:10,370 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 20 predicate places. [2023-11-29 06:32:10,370 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 238 flow [2023-11-29 06:32:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:10,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:10,371 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:32:10,371 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash -215919076, now seen corresponding path program 1 times [2023-11-29 06:32:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234690551] [2023-11-29 06:32:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:10,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234690551] [2023-11-29 06:32:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234690551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:10,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:32:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269469836] [2023-11-29 06:32:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:10,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:32:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:32:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:32:11,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 76 [2023-11-29 06:32:11,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:11,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:11,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 76 [2023-11-29 06:32:11,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:11,208 INFO L124 PetriNetUnfolderBase]: 65/277 cut-off events. [2023-11-29 06:32:11,208 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-29 06:32:11,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 277 events. 65/277 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1230 event pairs, 63 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 468. Up to 160 conditions per place. [2023-11-29 06:32:11,211 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 35 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2023-11-29 06:32:11,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 75 transitions, 322 flow [2023-11-29 06:32:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:32:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:32:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 306 transitions. [2023-11-29 06:32:11,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575187969924812 [2023-11-29 06:32:11,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 306 transitions. [2023-11-29 06:32:11,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 306 transitions. [2023-11-29 06:32:11,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:11,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 306 transitions. [2023-11-29 06:32:11,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:11,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:11,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:11,217 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 238 flow. Second operand 7 states and 306 transitions. [2023-11-29 06:32:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 75 transitions, 322 flow [2023-11-29 06:32:11,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 75 transitions, 316 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:32:11,222 INFO L231 Difference]: Finished difference. Result has 98 places, 75 transitions, 246 flow [2023-11-29 06:32:11,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2023-11-29 06:32:11,223 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 21 predicate places. [2023-11-29 06:32:11,223 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 246 flow [2023-11-29 06:32:11,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:11,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:11,224 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:11,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:32:11,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:11,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -215919075, now seen corresponding path program 1 times [2023-11-29 06:32:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:11,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607462962] [2023-11-29 06:32:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:11,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:11,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607462962] [2023-11-29 06:32:11,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607462962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:11,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:11,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:32:11,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627718541] [2023-11-29 06:32:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:32:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:32:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:32:12,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 76 [2023-11-29 06:32:12,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 76 [2023-11-29 06:32:12,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:12,412 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2023-11-29 06:32:12,412 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-11-29 06:32:12,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 273 events. 65/273 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1221 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 472. Up to 160 conditions per place. [2023-11-29 06:32:12,414 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 34 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2023-11-29 06:32:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 73 transitions, 328 flow [2023-11-29 06:32:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:32:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:32:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 284 transitions. [2023-11-29 06:32:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2023-11-29 06:32:12,416 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 284 transitions. [2023-11-29 06:32:12,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 284 transitions. [2023-11-29 06:32:12,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:12,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 284 transitions. [2023-11-29 06:32:12,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 40.57142857142857) internal successors, (284), 7 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,420 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 76.0) internal successors, (608), 8 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,420 INFO L175 Difference]: Start difference. First operand has 98 places, 75 transitions, 246 flow. Second operand 7 states and 284 transitions. [2023-11-29 06:32:12,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 73 transitions, 328 flow [2023-11-29 06:32:12,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 73 transitions, 310 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:32:12,423 INFO L231 Difference]: Finished difference. Result has 96 places, 73 transitions, 242 flow [2023-11-29 06:32:12,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=96, PETRI_TRANSITIONS=73} [2023-11-29 06:32:12,424 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 19 predicate places. [2023-11-29 06:32:12,425 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 73 transitions, 242 flow [2023-11-29 06:32:12,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.57142857142857) internal successors, (263), 7 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:12,425 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:12,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:32:12,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:12,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1339786284, now seen corresponding path program 1 times [2023-11-29 06:32:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291681040] [2023-11-29 06:32:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:12,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:12,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291681040] [2023-11-29 06:32:12,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291681040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:12,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:12,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:32:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925477434] [2023-11-29 06:32:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:32:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:32:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:32:12,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 76 [2023-11-29 06:32:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 73 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:12,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 76 [2023-11-29 06:32:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:12,822 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2023-11-29 06:32:12,822 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-11-29 06:32:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 271 events. 65/271 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1214 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 470. Up to 162 conditions per place. [2023-11-29 06:32:12,823 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 34 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2023-11-29 06:32:12,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 72 transitions, 326 flow [2023-11-29 06:32:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:32:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:32:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 236 transitions. [2023-11-29 06:32:12,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2023-11-29 06:32:12,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 236 transitions. [2023-11-29 06:32:12,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 236 transitions. [2023-11-29 06:32:12,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:12,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 236 transitions. [2023-11-29 06:32:12,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.2) internal successors, (236), 5 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,827 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,827 INFO L175 Difference]: Start difference. First operand has 96 places, 73 transitions, 242 flow. Second operand 5 states and 236 transitions. [2023-11-29 06:32:12,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 72 transitions, 326 flow [2023-11-29 06:32:12,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 72 transitions, 308 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:32:12,830 INFO L231 Difference]: Finished difference. Result has 93 places, 72 transitions, 240 flow [2023-11-29 06:32:12,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2023-11-29 06:32:12,831 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 16 predicate places. [2023-11-29 06:32:12,831 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 240 flow [2023-11-29 06:32:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.4) internal successors, (217), 5 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:12,831 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:12,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 06:32:12,832 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:12,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1339786283, now seen corresponding path program 1 times [2023-11-29 06:32:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:12,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312580436] [2023-11-29 06:32:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:13,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:13,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312580436] [2023-11-29 06:32:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312580436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:32:13,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:32:13,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:32:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148911181] [2023-11-29 06:32:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:32:13,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:32:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:13,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:32:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:32:13,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 76 [2023-11-29 06:32:13,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:13,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 76 [2023-11-29 06:32:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:13,294 INFO L124 PetriNetUnfolderBase]: 65/269 cut-off events. [2023-11-29 06:32:13,294 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-11-29 06:32:13,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 269 events. 65/269 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1191 event pairs, 63 based on Foata normal form. 2/227 useless extension candidates. Maximal degree in co-relation 464. Up to 162 conditions per place. [2023-11-29 06:32:13,296 INFO L140 encePairwiseOnDemand]: 69/76 looper letters, 32 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2023-11-29 06:32:13,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 71 transitions, 320 flow [2023-11-29 06:32:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:32:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:32:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2023-11-29 06:32:13,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2023-11-29 06:32:13,298 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 244 transitions. [2023-11-29 06:32:13,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 244 transitions. [2023-11-29 06:32:13,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:13,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 244 transitions. [2023-11-29 06:32:13,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,300 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,301 INFO L175 Difference]: Start difference. First operand has 93 places, 72 transitions, 240 flow. Second operand 5 states and 244 transitions. [2023-11-29 06:32:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 71 transitions, 320 flow [2023-11-29 06:32:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 71 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:32:13,304 INFO L231 Difference]: Finished difference. Result has 92 places, 71 transitions, 238 flow [2023-11-29 06:32:13,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=92, PETRI_TRANSITIONS=71} [2023-11-29 06:32:13,305 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2023-11-29 06:32:13,305 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 71 transitions, 238 flow [2023-11-29 06:32:13,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:13,306 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:13,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:32:13,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:13,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash 955583657, now seen corresponding path program 1 times [2023-11-29 06:32:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424638831] [2023-11-29 06:32:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424638831] [2023-11-29 06:32:13,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424638831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652965246] [2023-11-29 06:32:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:13,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:13,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:13,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:32:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:13,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:32:13,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:13,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652965246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:13,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 06:32:13,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863705920] [2023-11-29 06:32:13,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:32:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:32:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:32:13,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:13,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 71 transitions, 238 flow. Second operand has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:13,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:13,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:13,811 INFO L124 PetriNetUnfolderBase]: 65/294 cut-off events. [2023-11-29 06:32:13,811 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-29 06:32:13,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 294 events. 65/294 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1128 event pairs, 63 based on Foata normal form. 3/251 useless extension candidates. Maximal degree in co-relation 528. Up to 158 conditions per place. [2023-11-29 06:32:13,813 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 54 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-29 06:32:13,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 90 transitions, 442 flow [2023-11-29 06:32:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:32:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:32:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2023-11-29 06:32:13,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7478070175438597 [2023-11-29 06:32:13,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2023-11-29 06:32:13,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2023-11-29 06:32:13,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:13,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2023-11-29 06:32:13,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,819 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,819 INFO L175 Difference]: Start difference. First operand has 92 places, 71 transitions, 238 flow. Second operand 6 states and 341 transitions. [2023-11-29 06:32:13,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 90 transitions, 442 flow [2023-11-29 06:32:13,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 392 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:32:13,822 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 262 flow [2023-11-29 06:32:13,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-11-29 06:32:13,823 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 20 predicate places. [2023-11-29 06:32:13,823 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 262 flow [2023-11-29 06:32:13,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:13,824 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:32:13,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:32:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:32:14,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:14,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -807162592, now seen corresponding path program 1 times [2023-11-29 06:32:14,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:14,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178768346] [2023-11-29 06:32:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178768346] [2023-11-29 06:32:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178768346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:14,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841679438] [2023-11-29 06:32:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:14,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:14,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:32:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:14,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 06:32:14,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:15,121 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 [2023-11-29 06:32:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:15,130 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 [2023-11-29 06:32:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:15,187 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 [2023-11-29 06:32:15,270 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 06:32:15,270 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 [2023-11-29 06:32:15,296 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 06:32:15,296 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 [2023-11-29 06:32:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:32:15,485 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 [2023-11-29 06:32:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:15,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:15,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:15,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-29 06:32:15,988 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:32:15,988 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 13 treesize of output 12 [2023-11-29 06:32:20,319 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_#StackHeapBarrier| 1))) (and (forall ((|v_ULTIMATE.start_main_~#t1~0#1.base_40| Int)) (or (forall ((v_ArrVal_762 Int) (|v_ULTIMATE.start_new_~p~0#1.base_72| Int) (v_ArrVal_761 Int)) (or (forall ((v_ArrVal_763 Int) (v_prenex_1 Int) (v_ArrVal_765 Int)) (or (= v_prenex_1 |c_~#c~0.base|) (< (+ 7 |c_~#c~0.offset|) (select (store (store (store |c_#length| |v_ULTIMATE.start_main_~#t1~0#1.base_40| v_ArrVal_761) |v_ULTIMATE.start_new_~p~0#1.base_72| v_ArrVal_763) v_prenex_1 v_ArrVal_765) |c_~#c~0.base|)))) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_40| v_ArrVal_762) |v_ULTIMATE.start_new_~p~0#1.base_72|) 0)) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_~p~0#1.base_72| 1)))) (< |v_ULTIMATE.start_main_~#t1~0#1.base_40| .cse0))) (or (forall ((v_ArrVal_762 Int) (|v_ULTIMATE.start_new_~p~0#1.base_72| Int) (|v_ULTIMATE.start_main_~#t1~0#1.base_40| Int)) (or (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~#t1~0#1.base_40| v_ArrVal_762) |v_ULTIMATE.start_new_~p~0#1.base_72|) 0)) (< |v_ULTIMATE.start_main_~#t1~0#1.base_40| .cse0) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_new_~p~0#1.base_72| 1)))) (< 0 (+ 5 |c_~#c~0.offset|))))) is different from false [2023-11-29 06:32:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:20,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841679438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:20,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:20,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-11-29 06:32:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801985084] [2023-11-29 06:32:20,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:32:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:20,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:32:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=406, Unknown=1, NotChecked=42, Total=552 [2023-11-29 06:32:21,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 76 [2023-11-29 06:32:21,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 262 flow. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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) [2023-11-29 06:32:21,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:21,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 76 [2023-11-29 06:32:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:22,332 INFO L124 PetriNetUnfolderBase]: 372/877 cut-off events. [2023-11-29 06:32:22,333 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-29 06:32:22,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 877 events. 372/877 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4518 event pairs, 244 based on Foata normal form. 6/492 useless extension candidates. Maximal degree in co-relation 1804. Up to 594 conditions per place. [2023-11-29 06:32:22,338 INFO L140 encePairwiseOnDemand]: 63/76 looper letters, 118 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2023-11-29 06:32:22,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 135 transitions, 660 flow [2023-11-29 06:32:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:32:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:32:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2023-11-29 06:32:22,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19210526315789472 [2023-11-29 06:32:22,341 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 146 transitions. [2023-11-29 06:32:22,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 146 transitions. [2023-11-29 06:32:22,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:22,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 146 transitions. [2023-11-29 06:32:22,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:22,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:22,343 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 76.0) internal successors, (836), 11 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:22,344 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 262 flow. Second operand 10 states and 146 transitions. [2023-11-29 06:32:22,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 135 transitions, 660 flow [2023-11-29 06:32:22,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 135 transitions, 648 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 06:32:22,348 INFO L231 Difference]: Finished difference. Result has 106 places, 77 transitions, 314 flow [2023-11-29 06:32:22,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=314, PETRI_PLACES=106, PETRI_TRANSITIONS=77} [2023-11-29 06:32:22,348 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2023-11-29 06:32:22,348 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 77 transitions, 314 flow [2023-11-29 06:32:22,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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) [2023-11-29 06:32:22,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:22,349 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 06:32:22,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:32:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:32:22,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:22,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2028086292, now seen corresponding path program 2 times [2023-11-29 06:32:22,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897311536] [2023-11-29 06:32:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897311536] [2023-11-29 06:32:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897311536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502279992] [2023-11-29 06:32:22,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:32:22,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:22,877 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:22,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:32:23,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:32:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:23,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:32:23,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:23,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 06:32:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502279992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:23,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:23,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 06:32:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409950435] [2023-11-29 06:32:23,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:32:23,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:32:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:32:23,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 76 [2023-11-29 06:32:23,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 77 transitions, 314 flow. Second operand has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 76 [2023-11-29 06:32:23,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:23,764 INFO L124 PetriNetUnfolderBase]: 73/422 cut-off events. [2023-11-29 06:32:23,764 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2023-11-29 06:32:23,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 422 events. 73/422 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1686 event pairs, 71 based on Foata normal form. 6/360 useless extension candidates. Maximal degree in co-relation 831. Up to 190 conditions per place. [2023-11-29 06:32:23,767 INFO L140 encePairwiseOnDemand]: 72/76 looper letters, 92 selfloop transitions, 12 changer transitions 0/132 dead transitions. [2023-11-29 06:32:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 132 transitions, 770 flow [2023-11-29 06:32:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:32:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:32:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 674 transitions. [2023-11-29 06:32:23,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7390350877192983 [2023-11-29 06:32:23,771 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 674 transitions. [2023-11-29 06:32:23,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 674 transitions. [2023-11-29 06:32:23,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:23,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 674 transitions. [2023-11-29 06:32:23,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 56.166666666666664) internal successors, (674), 12 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,777 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 76.0) internal successors, (988), 13 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,777 INFO L175 Difference]: Start difference. First operand has 106 places, 77 transitions, 314 flow. Second operand 12 states and 674 transitions. [2023-11-29 06:32:23,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 132 transitions, 770 flow [2023-11-29 06:32:23,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 132 transitions, 745 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-29 06:32:23,784 INFO L231 Difference]: Finished difference. Result has 117 places, 84 transitions, 406 flow [2023-11-29 06:32:23,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=117, PETRI_TRANSITIONS=84} [2023-11-29 06:32:23,785 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2023-11-29 06:32:23,785 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 84 transitions, 406 flow [2023-11-29 06:32:23,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.38461538461539) internal successors, (694), 13 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:23,786 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-29 06:32:23,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:32:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:32:23,993 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 06:32:23,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1515936554, now seen corresponding path program 3 times [2023-11-29 06:32:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645933329] [2023-11-29 06:32:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-11-29 06:32:28,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:28,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645933329] [2023-11-29 06:32:28,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645933329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:28,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136742185] [2023-11-29 06:32:28,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:32:28,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:28,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ab8c4c-41b6-4564-aa39-87aad0d5ba88/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process