./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI --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 e8cd6f4fedd4ae62debc23b5e2621fa19163a924ac1cc7b32aeb6e38c2fa5ce1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:00,256 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:00,381 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:59:00,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:00,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:00,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:00,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:00,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:00,454 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:00,460 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:00,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:00,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:00,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:00,462 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:00,463 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:00,463 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:00,464 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:00,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:00,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:00,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:00,466 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:59:00,466 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:59:00,467 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:59:00,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:00,468 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:59:00,468 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:59:00,469 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:00,469 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:00,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:00,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:00,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:00,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:00,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:00,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:00,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:00,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:00,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:00,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:00,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:00,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:00,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:00,484 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_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8cd6f4fedd4ae62debc23b5e2621fa19163a924ac1cc7b32aeb6e38c2fa5ce1 [2023-11-24 21:59:00,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:00,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:00,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:00,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:00,859 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:00,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i [2023-11-24 21:59:04,118 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:04,579 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:04,579 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr-deref.i [2023-11-24 21:59:04,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/data/8998dfdbd/1785b943e1e94448bfa42a6d1ec20fac/FLAG9a9efc217 [2023-11-24 21:59:04,626 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/data/8998dfdbd/1785b943e1e94448bfa42a6d1ec20fac [2023-11-24 21:59:04,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:04,634 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:04,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:04,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:04,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:04,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:04" (1/1) ... [2023-11-24 21:59:04,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f94901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:04, skipping insertion in model container [2023-11-24 21:59:04,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:04" (1/1) ... [2023-11-24 21:59:04,727 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:05,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:05,486 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:05,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:05,666 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:05,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05 WrapperNode [2023-11-24 21:59:05,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:05,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:05,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:05,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:05,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,774 INFO L138 Inliner]: procedures = 371, calls = 44, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 205 [2023-11-24 21:59:05,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:05,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:05,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:05,776 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:05,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,809 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,856 INFO L175 MemorySlicer]: Split 42 memory accesses to 4 slices as follows [1, 9, 31, 1]. 74 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0, 0]. The 29 writes are split as follows [1, 3, 24, 1]. [2023-11-24 21:59:05,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:05,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:05,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:05,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:05,926 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (1/1) ... [2023-11-24 21:59:05,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:05,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:05,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:06,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:59:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:59:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:59:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:59:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:59:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:59:06,011 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:59:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:59:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:59:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:59:06,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:59:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:59:06,015 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:59:06,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:59:06,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:59:06,018 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:59:06,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:59:06,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:06,022 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:59:06,224 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:06,227 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:06,946 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:07,358 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:07,358 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:59:07,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:07 BoogieIcfgContainer [2023-11-24 21:59:07,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:07,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:07,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:07,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:07,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:04" (1/3) ... [2023-11-24 21:59:07,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ad924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:07, skipping insertion in model container [2023-11-24 21:59:07,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:05" (2/3) ... [2023-11-24 21:59:07,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ad924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:07, skipping insertion in model container [2023-11-24 21:59:07,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:07" (3/3) ... [2023-11-24 21:59:07,373 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr-deref.i [2023-11-24 21:59:07,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:07,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 81 error locations. [2023-11-24 21:59:07,396 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:59:07,490 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:59:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 278 flow [2023-11-24 21:59:07,626 INFO L124 PetriNetUnfolderBase]: 1/136 cut-off events. [2023-11-24 21:59:07,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:07,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 136 events. 1/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 274 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2023-11-24 21:59:07,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 278 flow [2023-11-24 21:59:07,651 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 136 transitions, 275 flow [2023-11-24 21:59:07,670 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:07,678 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;@159f2cec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:07,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 94 error locations. [2023-11-24 21:59:07,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:59:07,682 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-24 21:59:07,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:07,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:59:07,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:07,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 646922, now seen corresponding path program 1 times [2023-11-24 21:59:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441386975] [2023-11-24 21:59:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:07,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441386975] [2023-11-24 21:59:07,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441386975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:07,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:07,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817300147] [2023-11-24 21:59:07,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:07,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:08,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:08,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 137 [2023-11-24 21:59:08,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:08,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 137 [2023-11-24 21:59:08,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:08,330 INFO L124 PetriNetUnfolderBase]: 64/332 cut-off events. [2023-11-24 21:59:08,330 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:59:08,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 332 events. 64/332 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1328 event pairs, 63 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 376. Up to 167 conditions per place. [2023-11-24 21:59:08,340 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 39 selfloop transitions, 2 changer transitions 0/137 dead transitions. [2023-11-24 21:59:08,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 137 transitions, 359 flow [2023-11-24 21:59:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-11-24 21:59:08,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8102189781021898 [2023-11-24 21:59:08,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-11-24 21:59:08,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-11-24 21:59:08,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:08,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-11-24 21:59:08,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,388 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,390 INFO L175 Difference]: Start difference. First operand has 139 places, 136 transitions, 275 flow. Second operand 3 states and 333 transitions. [2023-11-24 21:59:08,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 137 transitions, 359 flow [2023-11-24 21:59:08,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 137 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:08,400 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 286 flow [2023-11-24 21:59:08,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2023-11-24 21:59:08,407 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-11-24 21:59:08,408 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 286 flow [2023-11-24 21:59:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:08,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:59:08,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:08,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:08,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 20050473, now seen corresponding path program 1 times [2023-11-24 21:59:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:08,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089366141] [2023-11-24 21:59:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089366141] [2023-11-24 21:59:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089366141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068267936] [2023-11-24 21:59:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:08,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:08,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:08,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:08,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:59:08,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:08,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:08,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068267936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:08,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-24 21:59:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757695867] [2023-11-24 21:59:08,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:08,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:08,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:08,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 137 [2023-11-24 21:59:08,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:08,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:08,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 137 [2023-11-24 21:59:08,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:09,101 INFO L124 PetriNetUnfolderBase]: 64/335 cut-off events. [2023-11-24 21:59:09,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 335 events. 64/335 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1305 event pairs, 63 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 508. Up to 167 conditions per place. [2023-11-24 21:59:09,109 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 39 selfloop transitions, 5 changer transitions 0/140 dead transitions. [2023-11-24 21:59:09,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 140 transitions, 386 flow [2023-11-24 21:59:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:59:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 629 transitions. [2023-11-24 21:59:09,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7652068126520681 [2023-11-24 21:59:09,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 629 transitions. [2023-11-24 21:59:09,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 629 transitions. [2023-11-24 21:59:09,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:09,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 629 transitions. [2023-11-24 21:59:09,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 104.83333333333333) internal successors, (629), 6 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,131 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,132 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 286 flow. Second operand 6 states and 629 transitions. [2023-11-24 21:59:09,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 140 transitions, 386 flow [2023-11-24 21:59:09,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 140 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:09,140 INFO L231 Difference]: Finished difference. Result has 148 places, 140 transitions, 318 flow [2023-11-24 21:59:09,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=148, PETRI_TRANSITIONS=140} [2023-11-24 21:59:09,141 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 9 predicate places. [2023-11-24 21:59:09,141 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 140 transitions, 318 flow [2023-11-24 21:59:09,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:09,143 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-24 21:59:09,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:09,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:09,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 319106762, now seen corresponding path program 2 times [2023-11-24 21:59:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269110771] [2023-11-24 21:59:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 21:59:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269110771] [2023-11-24 21:59:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269110771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:09,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:09,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178364573] [2023-11-24 21:59:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:09,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:09,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 137 [2023-11-24 21:59:09,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 140 transitions, 318 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:09,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 137 [2023-11-24 21:59:09,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:09,857 INFO L124 PetriNetUnfolderBase]: 64/323 cut-off events. [2023-11-24 21:59:09,857 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:59:09,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 323 events. 64/323 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1245 event pairs, 63 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 493. Up to 165 conditions per place. [2023-11-24 21:59:09,860 INFO L140 encePairwiseOnDemand]: 113/137 looper letters, 38 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2023-11-24 21:59:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 394 flow [2023-11-24 21:59:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-11-24 21:59:09,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7177615571776156 [2023-11-24 21:59:09,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-11-24 21:59:09,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-11-24 21:59:09,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:09,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-11-24 21:59:09,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 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) [2023-11-24 21:59:09,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,868 INFO L175 Difference]: Start difference. First operand has 148 places, 140 transitions, 318 flow. Second operand 3 states and 295 transitions. [2023-11-24 21:59:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 394 flow [2023-11-24 21:59:09,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 128 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:09,875 INFO L231 Difference]: Finished difference. Result has 137 places, 128 transitions, 304 flow [2023-11-24 21:59:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=137, PETRI_TRANSITIONS=128} [2023-11-24 21:59:09,876 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2023-11-24 21:59:09,877 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 128 transitions, 304 flow [2023-11-24 21:59:09,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:09,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:09,877 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-24 21:59:09,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:09,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:09,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash 319106763, now seen corresponding path program 1 times [2023-11-24 21:59:09,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:09,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227066044] [2023-11-24 21:59:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:09,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:09,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227066044] [2023-11-24 21:59:09,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227066044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:09,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067856168] [2023-11-24 21:59:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:09,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:09,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:10,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:10,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:59:10,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:10,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:10,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067856168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:10,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:10,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-24 21:59:10,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349992291] [2023-11-24 21:59:10,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:10,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:59:10,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:59:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:59:10,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 137 [2023-11-24 21:59:10,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 128 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 98.07692307692308) internal successors, (1275), 13 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:10,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 137 [2023-11-24 21:59:10,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:10,459 INFO L124 PetriNetUnfolderBase]: 64/329 cut-off events. [2023-11-24 21:59:10,459 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-24 21:59:10,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 329 events. 64/329 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1252 event pairs, 63 based on Foata normal form. 6/255 useless extension candidates. Maximal degree in co-relation 499. Up to 167 conditions per place. [2023-11-24 21:59:10,462 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 39 selfloop transitions, 11 changer transitions 0/134 dead transitions. [2023-11-24 21:59:10,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 134 transitions, 440 flow [2023-11-24 21:59:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:59:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:59:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1220 transitions. [2023-11-24 21:59:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7420924574209246 [2023-11-24 21:59:10,468 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1220 transitions. [2023-11-24 21:59:10,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1220 transitions. [2023-11-24 21:59:10,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:10,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1220 transitions. [2023-11-24 21:59:10,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,480 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,480 INFO L175 Difference]: Start difference. First operand has 137 places, 128 transitions, 304 flow. Second operand 12 states and 1220 transitions. [2023-11-24 21:59:10,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 134 transitions, 440 flow [2023-11-24 21:59:10,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 134 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:10,486 INFO L231 Difference]: Finished difference. Result has 152 places, 134 transitions, 364 flow [2023-11-24 21:59:10,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=152, PETRI_TRANSITIONS=134} [2023-11-24 21:59:10,487 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 13 predicate places. [2023-11-24 21:59:10,487 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 134 transitions, 364 flow [2023-11-24 21:59:10,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.07692307692308) internal successors, (1275), 13 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:10,489 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-24 21:59:10,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:10,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ccc24c-87fc-4ee7-a92a-8640bc815285/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:10,694 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:10,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash -903667093, now seen corresponding path program 2 times [2023-11-24 21:59:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:10,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533312526] [2023-11-24 21:59:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:10,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:10,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533312526] [2023-11-24 21:59:10,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533312526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:10,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:10,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340686736] [2023-11-24 21:59:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:10,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 137 [2023-11-24 21:59:10,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 134 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:10,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:10,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 137 [2023-11-24 21:59:10,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:11,124 INFO L124 PetriNetUnfolderBase]: 64/317 cut-off events. [2023-11-24 21:59:11,124 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-24 21:59:11,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 317 events. 64/317 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1213 event pairs, 63 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 481. Up to 171 conditions per place. [2023-11-24 21:59:11,127 INFO L140 encePairwiseOnDemand]: 113/137 looper letters, 38 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2023-11-24 21:59:11,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 122 transitions, 440 flow [2023-11-24 21:59:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-11-24 21:59:11,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7469586374695864 [2023-11-24 21:59:11,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-11-24 21:59:11,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-11-24 21:59:11,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:11,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-11-24 21:59:11,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,134 INFO L175 Difference]: Start difference. First operand has 152 places, 134 transitions, 364 flow. Second operand 3 states and 307 transitions. [2023-11-24 21:59:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 122 transitions, 440 flow [2023-11-24 21:59:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 122 transitions, 392 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-24 21:59:11,141 INFO L231 Difference]: Finished difference. Result has 137 places, 122 transitions, 316 flow [2023-11-24 21:59:11,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=137, PETRI_TRANSITIONS=122} [2023-11-24 21:59:11,142 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2023-11-24 21:59:11,143 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 122 transitions, 316 flow [2023-11-24 21:59:11,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:11,143 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 21:59:11,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:59:11,144 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:11,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash -840662422, now seen corresponding path program 1 times [2023-11-24 21:59:11,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:11,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991883067] [2023-11-24 21:59:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:11,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991883067] [2023-11-24 21:59:11,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991883067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:11,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:11,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223688130] [2023-11-24 21:59:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:11,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 137 [2023-11-24 21:59:11,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 122 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:11,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 137 [2023-11-24 21:59:11,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:11,957 INFO L124 PetriNetUnfolderBase]: 77/367 cut-off events. [2023-11-24 21:59:11,957 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-24 21:59:11,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 367 events. 77/367 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1559 event pairs, 55 based on Foata normal form. 2/294 useless extension candidates. Maximal degree in co-relation 584. Up to 163 conditions per place. [2023-11-24 21:59:11,961 INFO L140 encePairwiseOnDemand]: 126/137 looper letters, 69 selfloop transitions, 3 changer transitions 0/129 dead transitions. [2023-11-24 21:59:11,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 129 transitions, 474 flow [2023-11-24 21:59:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-11-24 21:59:11,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7262773722627737 [2023-11-24 21:59:11,964 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-11-24 21:59:11,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-11-24 21:59:11,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:11,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-11-24 21:59:11,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,968 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,969 INFO L175 Difference]: Start difference. First operand has 137 places, 122 transitions, 316 flow. Second operand 4 states and 398 transitions. [2023-11-24 21:59:11,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 129 transitions, 474 flow [2023-11-24 21:59:11,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 129 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:11,976 INFO L231 Difference]: Finished difference. Result has 133 places, 116 transitions, 295 flow [2023-11-24 21:59:11,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=133, PETRI_TRANSITIONS=116} [2023-11-24 21:59:11,977 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2023-11-24 21:59:11,978 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 116 transitions, 295 flow [2023-11-24 21:59:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:11,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:11,979 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 21:59:11,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:11,979 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:11,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -840662421, now seen corresponding path program 1 times [2023-11-24 21:59:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:11,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264461222] [2023-11-24 21:59:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:11,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:12,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264461222] [2023-11-24 21:59:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264461222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:12,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:12,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:12,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828531960] [2023-11-24 21:59:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:12,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 137 [2023-11-24 21:59:12,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 116 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 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) [2023-11-24 21:59:12,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:12,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 137 [2023-11-24 21:59:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:13,075 INFO L124 PetriNetUnfolderBase]: 84/383 cut-off events. [2023-11-24 21:59:13,076 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-24 21:59:13,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 383 events. 84/383 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1701 event pairs, 54 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 633. Up to 145 conditions per place. [2023-11-24 21:59:13,079 INFO L140 encePairwiseOnDemand]: 128/137 looper letters, 67 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2023-11-24 21:59:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 131 transitions, 474 flow [2023-11-24 21:59:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2023-11-24 21:59:13,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7094890510948905 [2023-11-24 21:59:13,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2023-11-24 21:59:13,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2023-11-24 21:59:13,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:13,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2023-11-24 21:59:13,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.2) internal successors, (486), 5 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:13,088 INFO L175 Difference]: Start difference. First operand has 133 places, 116 transitions, 295 flow. Second operand 5 states and 486 transitions. [2023-11-24 21:59:13,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 131 transitions, 474 flow [2023-11-24 21:59:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 131 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:13,094 INFO L231 Difference]: Finished difference. Result has 133 places, 114 transitions, 306 flow [2023-11-24 21:59:13,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=133, PETRI_TRANSITIONS=114} [2023-11-24 21:59:13,096 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2023-11-24 21:59:13,096 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 114 transitions, 306 flow [2023-11-24 21:59:13,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 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) [2023-11-24 21:59:13,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:13,097 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:13,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:13,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:13,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1793599229, now seen corresponding path program 1 times [2023-11-24 21:59:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:13,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057463749] [2023-11-24 21:59:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:13,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057463749] [2023-11-24 21:59:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057463749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:13,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:13,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:59:13,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81588099] [2023-11-24 21:59:13,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:13,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:13,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:14,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 137 [2023-11-24 21:59:14,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 114 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:14,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 137 [2023-11-24 21:59:14,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:14,574 INFO L124 PetriNetUnfolderBase]: 73/350 cut-off events. [2023-11-24 21:59:14,576 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-24 21:59:14,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 350 events. 73/350 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1496 event pairs, 65 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 644. Up to 192 conditions per place. [2023-11-24 21:59:14,584 INFO L140 encePairwiseOnDemand]: 115/137 looper letters, 49 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2023-11-24 21:59:14,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 109 transitions, 428 flow [2023-11-24 21:59:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:59:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 594 transitions. [2023-11-24 21:59:14,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541970802919708 [2023-11-24 21:59:14,588 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 594 transitions. [2023-11-24 21:59:14,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 594 transitions. [2023-11-24 21:59:14,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:14,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 594 transitions. [2023-11-24 21:59:14,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.25) internal successors, (594), 8 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,596 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,596 INFO L175 Difference]: Start difference. First operand has 133 places, 114 transitions, 306 flow. Second operand 8 states and 594 transitions. [2023-11-24 21:59:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 109 transitions, 428 flow [2023-11-24 21:59:14,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 109 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:59:14,602 INFO L231 Difference]: Finished difference. Result has 132 places, 109 transitions, 323 flow [2023-11-24 21:59:14,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=323, PETRI_PLACES=132, PETRI_TRANSITIONS=109} [2023-11-24 21:59:14,603 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -7 predicate places. [2023-11-24 21:59:14,603 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 109 transitions, 323 flow [2023-11-24 21:59:14,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:14,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:14,604 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:14,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:59:14,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:14,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:14,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1793599230, now seen corresponding path program 1 times [2023-11-24 21:59:14,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735626850] [2023-11-24 21:59:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:15,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:15,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735626850] [2023-11-24 21:59:15,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735626850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:15,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:59:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264938255] [2023-11-24 21:59:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:15,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:15,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2023-11-24 21:59:15,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 109 transitions, 323 flow. Second operand has 7 states, 7 states have (on average 60.42857142857143) internal successors, (423), 7 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:15,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:15,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2023-11-24 21:59:15,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:16,223 INFO L124 PetriNetUnfolderBase]: 73/348 cut-off events. [2023-11-24 21:59:16,224 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-24 21:59:16,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 348 events. 73/348 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1513 event pairs, 65 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 641. Up to 198 conditions per place. [2023-11-24 21:59:16,227 INFO L140 encePairwiseOnDemand]: 122/137 looper letters, 52 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2023-11-24 21:59:16,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 107 transitions, 449 flow [2023-11-24 21:59:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:59:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-11-24 21:59:16,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869655891553702 [2023-11-24 21:59:16,230 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-11-24 21:59:16,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-11-24 21:59:16,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:16,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-11-24 21:59:16,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:16,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:16,235 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:16,235 INFO L175 Difference]: Start difference. First operand has 132 places, 109 transitions, 323 flow. Second operand 7 states and 467 transitions. [2023-11-24 21:59:16,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 107 transitions, 449 flow [2023-11-24 21:59:16,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 107 transitions, 415 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:59:16,240 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 311 flow [2023-11-24 21:59:16,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2023-11-24 21:59:16,241 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -10 predicate places. [2023-11-24 21:59:16,241 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 311 flow [2023-11-24 21:59:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.42857142857143) internal successors, (423), 7 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:16,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:16,242 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:59:16,243 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:16,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1366995786, now seen corresponding path program 1 times [2023-11-24 21:59:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:16,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130259362] [2023-11-24 21:59:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:16,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130259362] [2023-11-24 21:59:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130259362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:16,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:16,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:16,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602462765] [2023-11-24 21:59:16,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:16,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:16,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 137 [2023-11-24 21:59:16,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 311 flow. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:16,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:16,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 137 [2023-11-24 21:59:16,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:17,147 INFO L124 PetriNetUnfolderBase]: 73/347 cut-off events. [2023-11-24 21:59:17,147 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-24 21:59:17,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 347 events. 73/347 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1500 event pairs, 65 based on Foata normal form. 1/282 useless extension candidates. Maximal degree in co-relation 627. Up to 197 conditions per place. [2023-11-24 21:59:17,150 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 43 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2023-11-24 21:59:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 106 transitions, 421 flow [2023-11-24 21:59:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 449 transitions. [2023-11-24 21:59:17,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6554744525547446 [2023-11-24 21:59:17,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 449 transitions. [2023-11-24 21:59:17,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 449 transitions. [2023-11-24 21:59:17,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:17,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 449 transitions. [2023-11-24 21:59:17,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,158 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,158 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 311 flow. Second operand 5 states and 449 transitions. [2023-11-24 21:59:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 106 transitions, 421 flow [2023-11-24 21:59:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 106 transitions, 395 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:59:17,163 INFO L231 Difference]: Finished difference. Result has 126 places, 106 transitions, 309 flow [2023-11-24 21:59:17,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=126, PETRI_TRANSITIONS=106} [2023-11-24 21:59:17,164 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-11-24 21:59:17,164 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 106 transitions, 309 flow [2023-11-24 21:59:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:17,165 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:17,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:59:17,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:17,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1366995785, now seen corresponding path program 1 times [2023-11-24 21:59:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449925584] [2023-11-24 21:59:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:17,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:17,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:17,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449925584] [2023-11-24 21:59:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449925584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:17,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:17,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215757616] [2023-11-24 21:59:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:17,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:17,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 137 [2023-11-24 21:59:17,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 106 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:17,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 137 [2023-11-24 21:59:17,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:17,878 INFO L124 PetriNetUnfolderBase]: 73/346 cut-off events. [2023-11-24 21:59:17,878 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-11-24 21:59:17,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 346 events. 73/346 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1504 event pairs, 65 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 632. Up to 197 conditions per place. [2023-11-24 21:59:17,881 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 49 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2023-11-24 21:59:17,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 105 transitions, 431 flow [2023-11-24 21:59:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 425 transitions. [2023-11-24 21:59:17,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204379562043796 [2023-11-24 21:59:17,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 425 transitions. [2023-11-24 21:59:17,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 425 transitions. [2023-11-24 21:59:17,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:17,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 425 transitions. [2023-11-24 21:59:17,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,890 INFO L175 Difference]: Start difference. First operand has 126 places, 106 transitions, 309 flow. Second operand 5 states and 425 transitions. [2023-11-24 21:59:17,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 105 transitions, 431 flow [2023-11-24 21:59:17,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 405 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:17,894 INFO L231 Difference]: Finished difference. Result has 125 places, 105 transitions, 307 flow [2023-11-24 21:59:17,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=125, PETRI_TRANSITIONS=105} [2023-11-24 21:59:17,895 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -14 predicate places. [2023-11-24 21:59:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 105 transitions, 307 flow [2023-11-24 21:59:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:17,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:17,896 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:59:17,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:17,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -707749788, now seen corresponding path program 1 times [2023-11-24 21:59:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652797425] [2023-11-24 21:59:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:18,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652797425] [2023-11-24 21:59:18,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652797425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:18,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:18,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:18,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565527698] [2023-11-24 21:59:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:18,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:59:18,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:59:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:19,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 137 [2023-11-24 21:59:19,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 105 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:19,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:19,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 137 [2023-11-24 21:59:19,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:19,632 INFO L124 PetriNetUnfolderBase]: 84/378 cut-off events. [2023-11-24 21:59:19,632 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-24 21:59:19,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 378 events. 84/378 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1730 event pairs, 54 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 684. Up to 145 conditions per place. [2023-11-24 21:59:19,636 INFO L140 encePairwiseOnDemand]: 128/137 looper letters, 70 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2023-11-24 21:59:19,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 508 flow [2023-11-24 21:59:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:59:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2023-11-24 21:59:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7055961070559611 [2023-11-24 21:59:19,639 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2023-11-24 21:59:19,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2023-11-24 21:59:19,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:19,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2023-11-24 21:59:19,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:19,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:19,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:19,646 INFO L175 Difference]: Start difference. First operand has 125 places, 105 transitions, 307 flow. Second operand 6 states and 580 transitions. [2023-11-24 21:59:19,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 508 flow [2023-11-24 21:59:19,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 482 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:19,650 INFO L231 Difference]: Finished difference. Result has 124 places, 104 transitions, 304 flow [2023-11-24 21:59:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=124, PETRI_TRANSITIONS=104} [2023-11-24 21:59:19,652 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -15 predicate places. [2023-11-24 21:59:19,652 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 104 transitions, 304 flow [2023-11-24 21:59:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:19,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:19,653 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:19,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:59:19,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:19,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash -763110362, now seen corresponding path program 1 times [2023-11-24 21:59:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:19,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205199497] [2023-11-24 21:59:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:19,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205199497] [2023-11-24 21:59:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205199497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:20,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:20,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:59:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848328726] [2023-11-24 21:59:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:59:20,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:59:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:59:21,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 137 [2023-11-24 21:59:21,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 104 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 73.25) internal successors, (586), 8 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:21,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:21,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 137 [2023-11-24 21:59:21,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:22,305 INFO L124 PetriNetUnfolderBase]: 73/341 cut-off events. [2023-11-24 21:59:22,305 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-24 21:59:22,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 341 events. 73/341 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1502 event pairs, 45 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 655. Up to 113 conditions per place. [2023-11-24 21:59:22,309 INFO L140 encePairwiseOnDemand]: 115/137 looper letters, 56 selfloop transitions, 20 changer transitions 3/116 dead transitions. [2023-11-24 21:59:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 116 transitions, 493 flow [2023-11-24 21:59:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:59:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:59:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 709 transitions. [2023-11-24 21:59:22,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5750202757502028 [2023-11-24 21:59:22,313 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 709 transitions. [2023-11-24 21:59:22,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 709 transitions. [2023-11-24 21:59:22,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:22,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 709 transitions. [2023-11-24 21:59:22,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:22,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:22,321 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 137.0) internal successors, (1370), 10 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:22,322 INFO L175 Difference]: Start difference. First operand has 124 places, 104 transitions, 304 flow. Second operand 9 states and 709 transitions. [2023-11-24 21:59:22,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 116 transitions, 493 flow [2023-11-24 21:59:22,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 116 transitions, 481 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:22,327 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 324 flow [2023-11-24 21:59:22,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=324, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2023-11-24 21:59:22,329 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -15 predicate places. [2023-11-24 21:59:22,329 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 324 flow [2023-11-24 21:59:22,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 73.25) internal successors, (586), 8 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:22,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:22,330 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:22,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:59:22,330 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:22,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:22,331 INFO L85 PathProgramCache]: Analyzing trace with hash -763110363, now seen corresponding path program 1 times [2023-11-24 21:59:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:22,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043531148] [2023-11-24 21:59:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:22,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043531148] [2023-11-24 21:59:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043531148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:59:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834256971] [2023-11-24 21:59:22,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:22,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:23,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 137 [2023-11-24 21:59:23,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 324 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:23,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:23,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 137 [2023-11-24 21:59:23,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:23,841 INFO L124 PetriNetUnfolderBase]: 73/339 cut-off events. [2023-11-24 21:59:23,841 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-24 21:59:23,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 339 events. 73/339 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1499 event pairs, 45 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 676. Up to 111 conditions per place. [2023-11-24 21:59:23,845 INFO L140 encePairwiseOnDemand]: 117/137 looper letters, 56 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2023-11-24 21:59:23,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 106 transitions, 486 flow [2023-11-24 21:59:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:59:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2023-11-24 21:59:23,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456204379562044 [2023-11-24 21:59:23,849 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2023-11-24 21:59:23,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2023-11-24 21:59:23,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:23,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2023-11-24 21:59:23,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:23,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:23,855 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:23,855 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 324 flow. Second operand 8 states and 598 transitions. [2023-11-24 21:59:23,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 106 transitions, 486 flow [2023-11-24 21:59:23,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 106 transitions, 446 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-24 21:59:23,860 INFO L231 Difference]: Finished difference. Result has 121 places, 98 transitions, 316 flow [2023-11-24 21:59:23,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=121, PETRI_TRANSITIONS=98} [2023-11-24 21:59:23,862 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -18 predicate places. [2023-11-24 21:59:23,862 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 98 transitions, 316 flow [2023-11-24 21:59:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:23,863 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:59:23,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:23,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1090371839, now seen corresponding path program 1 times [2023-11-24 21:59:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064503549] [2023-11-24 21:59:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:24,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064503549] [2023-11-24 21:59:24,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064503549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:24,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:24,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188934592] [2023-11-24 21:59:24,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:24,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 137 [2023-11-24 21:59:24,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 98 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:24,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:24,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 137 [2023-11-24 21:59:24,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:24,539 INFO L124 PetriNetUnfolderBase]: 73/336 cut-off events. [2023-11-24 21:59:24,539 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-24 21:59:24,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 336 events. 73/336 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1480 event pairs, 60 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 650. Up to 196 conditions per place. [2023-11-24 21:59:24,542 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 50 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2023-11-24 21:59:24,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 440 flow [2023-11-24 21:59:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 424 transitions. [2023-11-24 21:59:24,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.618978102189781 [2023-11-24 21:59:24,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 424 transitions. [2023-11-24 21:59:24,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 424 transitions. [2023-11-24 21:59:24,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:24,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 424 transitions. [2023-11-24 21:59:24,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:24,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:24,551 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:24,551 INFO L175 Difference]: Start difference. First operand has 121 places, 98 transitions, 316 flow. Second operand 5 states and 424 transitions. [2023-11-24 21:59:24,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 440 flow [2023-11-24 21:59:24,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 97 transitions, 404 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:59:24,555 INFO L231 Difference]: Finished difference. Result has 117 places, 97 transitions, 304 flow [2023-11-24 21:59:24,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=117, PETRI_TRANSITIONS=97} [2023-11-24 21:59:24,557 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2023-11-24 21:59:24,557 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 97 transitions, 304 flow [2023-11-24 21:59:24,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:24,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:24,558 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:59:24,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:24,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:24,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1090371840, now seen corresponding path program 1 times [2023-11-24 21:59:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:24,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524447580] [2023-11-24 21:59:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:24,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:24,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524447580] [2023-11-24 21:59:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524447580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528117949] [2023-11-24 21:59:24,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:24,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:24,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:25,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 137 [2023-11-24 21:59:25,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 97 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:25,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 137 [2023-11-24 21:59:25,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:25,548 INFO L124 PetriNetUnfolderBase]: 73/335 cut-off events. [2023-11-24 21:59:25,549 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-24 21:59:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 335 events. 73/335 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1477 event pairs, 60 based on Foata normal form. 1/274 useless extension candidates. Maximal degree in co-relation 629. Up to 196 conditions per place. [2023-11-24 21:59:25,552 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 44 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2023-11-24 21:59:25,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 416 flow [2023-11-24 21:59:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:25,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2023-11-24 21:59:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654014598540146 [2023-11-24 21:59:25,555 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2023-11-24 21:59:25,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2023-11-24 21:59:25,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:25,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2023-11-24 21:59:25,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,560 INFO L175 Difference]: Start difference. First operand has 117 places, 97 transitions, 304 flow. Second operand 5 states and 448 transitions. [2023-11-24 21:59:25,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 416 flow [2023-11-24 21:59:25,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 96 transitions, 390 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:25,565 INFO L231 Difference]: Finished difference. Result has 116 places, 96 transitions, 302 flow [2023-11-24 21:59:25,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=116, PETRI_TRANSITIONS=96} [2023-11-24 21:59:25,566 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2023-11-24 21:59:25,566 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 96 transitions, 302 flow [2023-11-24 21:59:25,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:25,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:25,567 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:25,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:59:25,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:25,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash 459852901, now seen corresponding path program 1 times [2023-11-24 21:59:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:25,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480763731] [2023-11-24 21:59:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:27,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480763731] [2023-11-24 21:59:27,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480763731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-24 21:59:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108215589] [2023-11-24 21:59:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:59:27,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:59:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:59:31,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 137 [2023-11-24 21:59:31,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 96 transitions, 302 flow. Second operand has 17 states, 17 states have (on average 48.470588235294116) internal successors, (824), 17 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:31,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:31,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 137 [2023-11-24 21:59:31,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:32,306 INFO L124 PetriNetUnfolderBase]: 73/335 cut-off events. [2023-11-24 21:59:32,306 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-11-24 21:59:32,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 335 events. 73/335 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1482 event pairs, 45 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 638. Up to 108 conditions per place. [2023-11-24 21:59:32,310 INFO L140 encePairwiseOnDemand]: 115/137 looper letters, 57 selfloop transitions, 22 changer transitions 3/110 dead transitions. [2023-11-24 21:59:32,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 110 transitions, 501 flow [2023-11-24 21:59:32,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:59:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-24 21:59:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 729 transitions. [2023-11-24 21:59:32,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800834202294056 [2023-11-24 21:59:32,315 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 729 transitions. [2023-11-24 21:59:32,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 729 transitions. [2023-11-24 21:59:32,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:32,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 729 transitions. [2023-11-24 21:59:32,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 52.07142857142857) internal successors, (729), 14 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,324 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 137.0) internal successors, (2055), 15 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,324 INFO L175 Difference]: Start difference. First operand has 116 places, 96 transitions, 302 flow. Second operand 14 states and 729 transitions. [2023-11-24 21:59:32,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 110 transitions, 501 flow [2023-11-24 21:59:32,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 110 transitions, 475 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:59:32,329 INFO L231 Difference]: Finished difference. Result has 123 places, 94 transitions, 316 flow [2023-11-24 21:59:32,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=316, PETRI_PLACES=123, PETRI_TRANSITIONS=94} [2023-11-24 21:59:32,330 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -16 predicate places. [2023-11-24 21:59:32,331 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 94 transitions, 316 flow [2023-11-24 21:59:32,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 48.470588235294116) internal successors, (824), 17 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:32,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:32,332 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:32,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:59:32,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:32,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash 459852900, now seen corresponding path program 1 times [2023-11-24 21:59:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:32,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206711995] [2023-11-24 21:59:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:33,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206711995] [2023-11-24 21:59:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206711995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:59:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603873169] [2023-11-24 21:59:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:59:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:59:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:59:34,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 137 [2023-11-24 21:59:34,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 94 transitions, 316 flow. Second operand has 9 states, 9 states have (on average 81.77777777777777) internal successors, (736), 9 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:34,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:34,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 137 [2023-11-24 21:59:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:35,146 INFO L124 PetriNetUnfolderBase]: 73/334 cut-off events. [2023-11-24 21:59:35,146 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-24 21:59:35,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 334 events. 73/334 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1488 event pairs, 45 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 673. Up to 116 conditions per place. [2023-11-24 21:59:35,150 INFO L140 encePairwiseOnDemand]: 124/137 looper letters, 61 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-11-24 21:59:35,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 101 transitions, 478 flow [2023-11-24 21:59:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:59:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:59:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 692 transitions. [2023-11-24 21:59:35,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313868613138686 [2023-11-24 21:59:35,154 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 692 transitions. [2023-11-24 21:59:35,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 692 transitions. [2023-11-24 21:59:35,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:35,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 692 transitions. [2023-11-24 21:59:35,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.5) internal successors, (692), 8 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,161 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 137.0) internal successors, (1233), 9 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,162 INFO L175 Difference]: Start difference. First operand has 123 places, 94 transitions, 316 flow. Second operand 8 states and 692 transitions. [2023-11-24 21:59:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 101 transitions, 478 flow [2023-11-24 21:59:35,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 101 transitions, 434 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-24 21:59:35,167 INFO L231 Difference]: Finished difference. Result has 116 places, 93 transitions, 294 flow [2023-11-24 21:59:35,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=116, PETRI_TRANSITIONS=93} [2023-11-24 21:59:35,168 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2023-11-24 21:59:35,168 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 93 transitions, 294 flow [2023-11-24 21:59:35,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 81.77777777777777) internal successors, (736), 9 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:35,169 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:59:35,169 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:35,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash -462970267, now seen corresponding path program 1 times [2023-11-24 21:59:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103487136] [2023-11-24 21:59:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:35,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:35,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103487136] [2023-11-24 21:59:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103487136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:35,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:35,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382180125] [2023-11-24 21:59:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:35,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 137 [2023-11-24 21:59:35,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 93 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:35,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 137 [2023-11-24 21:59:35,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:35,887 INFO L124 PetriNetUnfolderBase]: 82/350 cut-off events. [2023-11-24 21:59:35,888 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-11-24 21:59:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 350 events. 82/350 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1572 event pairs, 36 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 677. Up to 123 conditions per place. [2023-11-24 21:59:35,891 INFO L140 encePairwiseOnDemand]: 117/137 looper letters, 53 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2023-11-24 21:59:35,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 100 transitions, 454 flow [2023-11-24 21:59:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:59:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2023-11-24 21:59:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.610705596107056 [2023-11-24 21:59:35,894 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 502 transitions. [2023-11-24 21:59:35,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 502 transitions. [2023-11-24 21:59:35,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:35,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 502 transitions. [2023-11-24 21:59:35,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,899 INFO L175 Difference]: Start difference. First operand has 116 places, 93 transitions, 294 flow. Second operand 6 states and 502 transitions. [2023-11-24 21:59:35,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 100 transitions, 454 flow [2023-11-24 21:59:35,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 100 transitions, 430 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-24 21:59:35,904 INFO L231 Difference]: Finished difference. Result has 112 places, 91 transitions, 302 flow [2023-11-24 21:59:35,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=112, PETRI_TRANSITIONS=91} [2023-11-24 21:59:35,905 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -27 predicate places. [2023-11-24 21:59:35,905 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 91 transitions, 302 flow [2023-11-24 21:59:35,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:35,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:35,905 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:59:35,906 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -462970266, now seen corresponding path program 1 times [2023-11-24 21:59:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520362743] [2023-11-24 21:59:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:36,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:36,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520362743] [2023-11-24 21:59:36,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520362743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:36,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:36,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149791277] [2023-11-24 21:59:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:36,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 137 [2023-11-24 21:59:36,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 91 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:36,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 137 [2023-11-24 21:59:36,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:36,812 INFO L124 PetriNetUnfolderBase]: 82/330 cut-off events. [2023-11-24 21:59:36,813 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-24 21:59:36,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 330 events. 82/330 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1439 event pairs, 18 based on Foata normal form. 2/290 useless extension candidates. Maximal degree in co-relation 675. Up to 161 conditions per place. [2023-11-24 21:59:36,816 INFO L140 encePairwiseOnDemand]: 119/137 looper letters, 49 selfloop transitions, 16 changer transitions 0/98 dead transitions. [2023-11-24 21:59:36,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 98 transitions, 450 flow [2023-11-24 21:59:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:59:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 532 transitions. [2023-11-24 21:59:36,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472019464720195 [2023-11-24 21:59:36,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 532 transitions. [2023-11-24 21:59:36,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 532 transitions. [2023-11-24 21:59:36,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:36,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 532 transitions. [2023-11-24 21:59:36,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 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) [2023-11-24 21:59:36,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,826 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,827 INFO L175 Difference]: Start difference. First operand has 112 places, 91 transitions, 302 flow. Second operand 6 states and 532 transitions. [2023-11-24 21:59:36,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 98 transitions, 450 flow [2023-11-24 21:59:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 98 transitions, 414 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:59:36,831 INFO L231 Difference]: Finished difference. Result has 110 places, 89 transitions, 294 flow [2023-11-24 21:59:36,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=110, PETRI_TRANSITIONS=89} [2023-11-24 21:59:36,832 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -29 predicate places. [2023-11-24 21:59:36,832 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 89 transitions, 294 flow [2023-11-24 21:59:36,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:36,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:36,838 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:36,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:59:36,839 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:36,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:36,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1745013380, now seen corresponding path program 1 times [2023-11-24 21:59:36,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:36,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866808006] [2023-11-24 21:59:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:36,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:37,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:37,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866808006] [2023-11-24 21:59:37,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866808006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:37,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:37,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:37,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109803481] [2023-11-24 21:59:37,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:37,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 137 [2023-11-24 21:59:37,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 89 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:37,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:37,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 137 [2023-11-24 21:59:37,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:38,069 INFO L124 PetriNetUnfolderBase]: 73/329 cut-off events. [2023-11-24 21:59:38,069 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-11-24 21:59:38,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 329 events. 73/329 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1478 event pairs, 45 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 634. Up to 121 conditions per place. [2023-11-24 21:59:38,073 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 51 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2023-11-24 21:59:38,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 96 transitions, 438 flow [2023-11-24 21:59:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-11-24 21:59:38,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.698905109489051 [2023-11-24 21:59:38,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-11-24 21:59:38,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-11-24 21:59:38,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:38,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-11-24 21:59:38,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,078 INFO L175 Difference]: Start difference. First operand has 110 places, 89 transitions, 294 flow. Second operand 4 states and 383 transitions. [2023-11-24 21:59:38,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 96 transitions, 438 flow [2023-11-24 21:59:38,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 406 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:59:38,086 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 286 flow [2023-11-24 21:59:38,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2023-11-24 21:59:38,086 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -32 predicate places. [2023-11-24 21:59:38,087 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 286 flow [2023-11-24 21:59:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:38,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:38,087 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:38,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:59:38,088 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:38,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1745013379, now seen corresponding path program 1 times [2023-11-24 21:59:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:38,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206607850] [2023-11-24 21:59:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:38,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:38,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:38,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206607850] [2023-11-24 21:59:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206607850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:38,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:38,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142051095] [2023-11-24 21:59:38,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:38,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:59:38,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:59:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:39,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 137 [2023-11-24 21:59:39,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:39,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 137 [2023-11-24 21:59:39,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:39,464 INFO L124 PetriNetUnfolderBase]: 73/328 cut-off events. [2023-11-24 21:59:39,464 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-24 21:59:39,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 328 events. 73/328 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1478 event pairs, 45 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 629. Up to 120 conditions per place. [2023-11-24 21:59:39,467 INFO L140 encePairwiseOnDemand]: 123/137 looper letters, 50 selfloop transitions, 13 changer transitions 0/95 dead transitions. [2023-11-24 21:59:39,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 95 transitions, 428 flow [2023-11-24 21:59:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:59:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 434 transitions. [2023-11-24 21:59:39,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.791970802919708 [2023-11-24 21:59:39,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 434 transitions. [2023-11-24 21:59:39,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 434 transitions. [2023-11-24 21:59:39,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:39,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 434 transitions. [2023-11-24 21:59:39,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,473 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,473 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 286 flow. Second operand 4 states and 434 transitions. [2023-11-24 21:59:39,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 95 transitions, 428 flow [2023-11-24 21:59:39,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 95 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:59:39,478 INFO L231 Difference]: Finished difference. Result has 106 places, 87 transitions, 284 flow [2023-11-24 21:59:39,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=106, PETRI_TRANSITIONS=87} [2023-11-24 21:59:39,479 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -33 predicate places. [2023-11-24 21:59:39,479 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 87 transitions, 284 flow [2023-11-24 21:59:39,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:39,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:59:39,480 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:39,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1269404698, now seen corresponding path program 1 times [2023-11-24 21:59:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:39,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966718971] [2023-11-24 21:59:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:39,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:39,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966718971] [2023-11-24 21:59:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966718971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:39,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:39,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:39,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722325048] [2023-11-24 21:59:39,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:39,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 137 [2023-11-24 21:59:39,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 87 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:39,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:39,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 137 [2023-11-24 21:59:39,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:40,048 INFO L124 PetriNetUnfolderBase]: 73/325 cut-off events. [2023-11-24 21:59:40,048 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-24 21:59:40,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 325 events. 73/325 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1437 event pairs, 53 based on Foata normal form. 9/285 useless extension candidates. Maximal degree in co-relation 626. Up to 187 conditions per place. [2023-11-24 21:59:40,052 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 60 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-11-24 21:59:40,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 93 transitions, 435 flow [2023-11-24 21:59:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-11-24 21:59:40,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8126520681265207 [2023-11-24 21:59:40,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-11-24 21:59:40,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-11-24 21:59:40,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:40,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-11-24 21:59:40,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,057 INFO L175 Difference]: Start difference. First operand has 106 places, 87 transitions, 284 flow. Second operand 3 states and 334 transitions. [2023-11-24 21:59:40,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 93 transitions, 435 flow [2023-11-24 21:59:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 407 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:59:40,064 INFO L231 Difference]: Finished difference. Result has 103 places, 85 transitions, 260 flow [2023-11-24 21:59:40,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=103, PETRI_TRANSITIONS=85} [2023-11-24 21:59:40,065 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -36 predicate places. [2023-11-24 21:59:40,065 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 85 transitions, 260 flow [2023-11-24 21:59:40,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:40,066 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:40,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:59:40,066 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:40,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1269404697, now seen corresponding path program 1 times [2023-11-24 21:59:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:40,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631382488] [2023-11-24 21:59:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:40,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:40,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631382488] [2023-11-24 21:59:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631382488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:40,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:40,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:40,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855846462] [2023-11-24 21:59:40,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:40,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:40,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:40,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 137 [2023-11-24 21:59:40,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 85 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:40,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 137 [2023-11-24 21:59:40,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:40,564 INFO L124 PetriNetUnfolderBase]: 84/329 cut-off events. [2023-11-24 21:59:40,564 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-24 21:59:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 329 events. 84/329 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1397 event pairs, 55 based on Foata normal form. 9/295 useless extension candidates. Maximal degree in co-relation 666. Up to 199 conditions per place. [2023-11-24 21:59:40,567 INFO L140 encePairwiseOnDemand]: 131/137 looper letters, 63 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-11-24 21:59:40,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 95 transitions, 429 flow [2023-11-24 21:59:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-11-24 21:59:40,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8175182481751825 [2023-11-24 21:59:40,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-11-24 21:59:40,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-11-24 21:59:40,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:40,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-11-24 21:59:40,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 137.0) internal successors, (548), 4 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,572 INFO L175 Difference]: Start difference. First operand has 103 places, 85 transitions, 260 flow. Second operand 3 states and 336 transitions. [2023-11-24 21:59:40,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 95 transitions, 429 flow [2023-11-24 21:59:40,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 95 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:40,576 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 296 flow [2023-11-24 21:59:40,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2023-11-24 21:59:40,577 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -34 predicate places. [2023-11-24 21:59:40,578 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 296 flow [2023-11-24 21:59:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:40,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:40,578 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:40,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 21:59:40,579 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:40,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 570830355, now seen corresponding path program 1 times [2023-11-24 21:59:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426848716] [2023-11-24 21:59:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:40,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:40,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426848716] [2023-11-24 21:59:40,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426848716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:40,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:59:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511019531] [2023-11-24 21:59:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:40,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:59:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:59:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:59:41,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 137 [2023-11-24 21:59:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 88.33333333333333) internal successors, (530), 6 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:41,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 137 [2023-11-24 21:59:41,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:41,756 INFO L124 PetriNetUnfolderBase]: 84/341 cut-off events. [2023-11-24 21:59:41,757 INFO L125 PetriNetUnfolderBase]: For 201/204 co-relation queries the response was YES. [2023-11-24 21:59:41,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 341 events. 84/341 cut-off events. For 201/204 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1480 event pairs, 45 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 720. Up to 113 conditions per place. [2023-11-24 21:59:41,760 INFO L140 encePairwiseOnDemand]: 126/137 looper letters, 68 selfloop transitions, 11 changer transitions 0/104 dead transitions. [2023-11-24 21:59:41,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 508 flow [2023-11-24 21:59:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:59:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:59:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 562 transitions. [2023-11-24 21:59:41,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.683698296836983 [2023-11-24 21:59:41,763 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 562 transitions. [2023-11-24 21:59:41,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 562 transitions. [2023-11-24 21:59:41,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:41,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 562 transitions. [2023-11-24 21:59:41,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.66666666666667) internal successors, (562), 6 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,767 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,767 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 296 flow. Second operand 6 states and 562 transitions. [2023-11-24 21:59:41,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 508 flow [2023-11-24 21:59:41,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 104 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:41,772 INFO L231 Difference]: Finished difference. Result has 107 places, 87 transitions, 306 flow [2023-11-24 21:59:41,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=107, PETRI_TRANSITIONS=87} [2023-11-24 21:59:41,773 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -32 predicate places. [2023-11-24 21:59:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 87 transitions, 306 flow [2023-11-24 21:59:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.33333333333333) internal successors, (530), 6 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:41,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:41,774 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 21:59:41,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash 570830356, now seen corresponding path program 1 times [2023-11-24 21:59:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796676088] [2023-11-24 21:59:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:42,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796676088] [2023-11-24 21:59:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796676088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:42,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:42,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:59:42,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417480641] [2023-11-24 21:59:42,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:42,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:43,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 137 [2023-11-24 21:59:43,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 87 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:43,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 137 [2023-11-24 21:59:43,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:43,585 INFO L124 PetriNetUnfolderBase]: 96/366 cut-off events. [2023-11-24 21:59:43,585 INFO L125 PetriNetUnfolderBase]: For 227/231 co-relation queries the response was YES. [2023-11-24 21:59:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 366 events. 96/366 cut-off events. For 227/231 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1662 event pairs, 51 based on Foata normal form. 10/331 useless extension candidates. Maximal degree in co-relation 798. Up to 140 conditions per place. [2023-11-24 21:59:43,588 INFO L140 encePairwiseOnDemand]: 124/137 looper letters, 74 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2023-11-24 21:59:43,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 556 flow [2023-11-24 21:59:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:59:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-24 21:59:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 601 transitions. [2023-11-24 21:59:43,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266944734098019 [2023-11-24 21:59:43,591 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 601 transitions. [2023-11-24 21:59:43,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 601 transitions. [2023-11-24 21:59:43,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:43,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 601 transitions. [2023-11-24 21:59:43,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,595 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,595 INFO L175 Difference]: Start difference. First operand has 107 places, 87 transitions, 306 flow. Second operand 7 states and 601 transitions. [2023-11-24 21:59:43,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 556 flow [2023-11-24 21:59:43,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 532 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:59:43,600 INFO L231 Difference]: Finished difference. Result has 109 places, 89 transitions, 331 flow [2023-11-24 21:59:43,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=109, PETRI_TRANSITIONS=89} [2023-11-24 21:59:43,601 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -30 predicate places. [2023-11-24 21:59:43,601 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 89 transitions, 331 flow [2023-11-24 21:59:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.57142857142857) internal successors, (557), 7 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:59:43,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:43,601 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 21:59:43,602 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2023-11-24 21:59:43,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 515872537, now seen corresponding path program 1 times [2023-11-24 21:59:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:43,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621426531] [2023-11-24 21:59:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat