./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/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_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/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_7a93b345-1b98-4ca4-9674-9d3ecea5e286/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 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:10,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:10,817 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:58:10,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:10,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:10,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:10,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:10,858 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:10,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:10,864 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:10,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:10,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:10,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:10,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:10,869 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:10,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:10,870 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:10,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:10,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:10,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:10,872 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:58:10,873 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:58:10,874 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:58:10,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:10,875 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:58:10,875 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:58:10,876 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:10,876 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:10,877 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:10,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:10,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:10,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:10,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:10,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:10,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:10,882 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:10,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:10,883 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:10,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:10,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:10,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:10,884 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_7a93b345-1b98-4ca4-9674-9d3ecea5e286/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 [2023-11-24 21:58:11,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:11,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:11,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:11,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:11,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:11,300 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/queue_ok.i [2023-11-24 21:58:14,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:14,837 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:14,838 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/sv-benchmarks/c/pthread/queue_ok.i [2023-11-24 21:58:14,868 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/data/197620d00/a1313bf598b84bc087fed1f736b51f85/FLAGa105143c9 [2023-11-24 21:58:14,888 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/data/197620d00/a1313bf598b84bc087fed1f736b51f85 [2023-11-24 21:58:14,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:14,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:14,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:14,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:14,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:14,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:14" (1/1) ... [2023-11-24 21:58:14,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443dece9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:14, skipping insertion in model container [2023-11-24 21:58:14,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:14" (1/1) ... [2023-11-24 21:58:14,974 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:15,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:15,555 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:15,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:15,727 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:15,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15 WrapperNode [2023-11-24 21:58:15,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:15,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:15,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:15,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:15,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,809 INFO L138 Inliner]: procedures = 275, calls = 61, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 214 [2023-11-24 21:58:15,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:15,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:15,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:15,811 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:15,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,860 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 2, 5, 2, 3, 24]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0, 0]. The 15 writes are split as follows [0, 1, 0, 1, 2, 11]. [2023-11-24 21:58:15,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,876 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,885 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:15,895 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:15,895 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:15,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:15,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (1/1) ... [2023-11-24 21:58:15,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:15,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:15,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:16,009 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 21:58:16,010 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 21:58:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 21:58:16,010 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 21:58:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:58:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:58:16,010 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:58:16,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:58:16,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:58:16,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:58:16,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:58:16,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:58:16,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:16,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:16,016 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 21:58:16,200 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:16,204 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:16,848 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:17,122 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:17,123 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:58:17,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:17 BoogieIcfgContainer [2023-11-24 21:58:17,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:17,127 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:17,127 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:17,131 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:17,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:14" (1/3) ... [2023-11-24 21:58:17,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2124fcd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:17, skipping insertion in model container [2023-11-24 21:58:17,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:15" (2/3) ... [2023-11-24 21:58:17,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2124fcd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:17, skipping insertion in model container [2023-11-24 21:58:17,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:17" (3/3) ... [2023-11-24 21:58:17,137 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok.i [2023-11-24 21:58:17,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:17,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-24 21:58:17,161 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:58:17,298 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:58:17,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 298 flow [2023-11-24 21:58:17,458 INFO L124 PetriNetUnfolderBase]: 11/140 cut-off events. [2023-11-24 21:58:17,458 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:58:17,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 470 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 105. Up to 3 conditions per place. [2023-11-24 21:58:17,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 298 flow [2023-11-24 21:58:17,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 139 transitions, 290 flow [2023-11-24 21:58:17,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:17,512 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;@2d8880a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:17,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-24 21:58:17,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:58:17,517 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:58:17,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:58:17,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:17,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:58:17,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:17,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:17,525 INFO L85 PathProgramCache]: Analyzing trace with hash 18931, now seen corresponding path program 1 times [2023-11-24 21:58:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:17,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211336827] [2023-11-24 21:58:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:18,027 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 21:58:18,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211336827] [2023-11-24 21:58:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211336827] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343853786] [2023-11-24 21:58:18,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:18,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:18,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 142 [2023-11-24 21:58:18,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 139 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:58:18,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:18,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 142 [2023-11-24 21:58:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:18,823 INFO L124 PetriNetUnfolderBase]: 1079/2979 cut-off events. [2023-11-24 21:58:18,824 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-24 21:58:18,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4743 conditions, 2979 events. 1079/2979 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23515 event pairs, 831 based on Foata normal form. 66/2136 useless extension candidates. Maximal degree in co-relation 4543. Up to 1708 conditions per place. [2023-11-24 21:58:18,922 INFO L140 encePairwiseOnDemand]: 134/142 looper letters, 49 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2023-11-24 21:58:18,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 127 transitions, 368 flow [2023-11-24 21:58:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-11-24 21:58:18,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6971830985915493 [2023-11-24 21:58:18,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-11-24 21:58:18,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-11-24 21:58:18,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:18,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-11-24 21:58:18,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 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 21:58:18,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:18,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:18,969 INFO L175 Difference]: Start difference. First operand has 135 places, 139 transitions, 290 flow. Second operand 3 states and 297 transitions. [2023-11-24 21:58:18,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 127 transitions, 368 flow [2023-11-24 21:58:18,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 127 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:58:18,982 INFO L231 Difference]: Finished difference. Result has 125 places, 127 transitions, 262 flow [2023-11-24 21:58:18,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=125, PETRI_TRANSITIONS=127} [2023-11-24 21:58:18,989 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -10 predicate places. [2023-11-24 21:58:18,989 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 127 transitions, 262 flow [2023-11-24 21:58:18,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 21:58:18,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:18,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:58:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:18,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:18,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash 18932, now seen corresponding path program 1 times [2023-11-24 21:58:18,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:18,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239458594] [2023-11-24 21:58:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:19,228 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 21:58:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239458594] [2023-11-24 21:58:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239458594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:19,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:19,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754385618] [2023-11-24 21:58:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:19,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:19,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 142 [2023-11-24 21:58:19,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 127 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:58:19,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:19,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 142 [2023-11-24 21:58:19,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:19,905 INFO L124 PetriNetUnfolderBase]: 1079/2976 cut-off events. [2023-11-24 21:58:19,906 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-24 21:58:19,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4704 conditions, 2976 events. 1079/2976 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23481 event pairs, 831 based on Foata normal form. 3/2070 useless extension candidates. Maximal degree in co-relation 4693. Up to 1708 conditions per place. [2023-11-24 21:58:19,936 INFO L140 encePairwiseOnDemand]: 137/142 looper letters, 47 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-11-24 21:58:19,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 124 transitions, 354 flow [2023-11-24 21:58:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-24 21:58:19,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6995305164319249 [2023-11-24 21:58:19,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-24 21:58:19,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-24 21:58:19,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:19,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-24 21:58:19,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 21:58:19,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:19,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:19,953 INFO L175 Difference]: Start difference. First operand has 125 places, 127 transitions, 262 flow. Second operand 3 states and 298 transitions. [2023-11-24 21:58:19,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 124 transitions, 354 flow [2023-11-24 21:58:19,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 124 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:19,970 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 256 flow [2023-11-24 21:58:19,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2023-11-24 21:58:19,971 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -13 predicate places. [2023-11-24 21:58:19,972 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 256 flow [2023-11-24 21:58:19,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 21:58:19,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:19,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:19,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 564545759, now seen corresponding path program 1 times [2023-11-24 21:58:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:19,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163563558] [2023-11-24 21:58:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:20,108 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 21:58:20,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:20,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163563558] [2023-11-24 21:58:20,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163563558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:20,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:20,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425301728] [2023-11-24 21:58:20,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:58:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:58:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:58:20,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2023-11-24 21:58:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:20,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:20,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2023-11-24 21:58:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:20,831 INFO L124 PetriNetUnfolderBase]: 1079/2974 cut-off events. [2023-11-24 21:58:20,831 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:58:20,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 2974 events. 1079/2974 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23506 event pairs, 831 based on Foata normal form. 0/2068 useless extension candidates. Maximal degree in co-relation 4692. Up to 1707 conditions per place. [2023-11-24 21:58:20,859 INFO L140 encePairwiseOnDemand]: 137/142 looper letters, 49 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2023-11-24 21:58:20,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 122 transitions, 356 flow [2023-11-24 21:58:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:58:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2023-11-24 21:58:20,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6373239436619719 [2023-11-24 21:58:20,862 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2023-11-24 21:58:20,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2023-11-24 21:58:20,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:20,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2023-11-24 21:58:20,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 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 21:58:20,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:20,866 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:20,866 INFO L175 Difference]: Start difference. First operand has 122 places, 124 transitions, 256 flow. Second operand 4 states and 362 transitions. [2023-11-24 21:58:20,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 122 transitions, 356 flow [2023-11-24 21:58:20,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 122 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:20,871 INFO L231 Difference]: Finished difference. Result has 121 places, 122 transitions, 254 flow [2023-11-24 21:58:20,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=121, PETRI_TRANSITIONS=122} [2023-11-24 21:58:20,872 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -14 predicate places. [2023-11-24 21:58:20,872 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 122 transitions, 254 flow [2023-11-24 21:58:20,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.0) internal successors, (390), 5 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:20,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:20,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:58:20,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:58:20,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:20,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 564545760, now seen corresponding path program 1 times [2023-11-24 21:58:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:20,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80923867] [2023-11-24 21:58:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:21,031 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 21:58:21,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:21,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80923867] [2023-11-24 21:58:21,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80923867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:21,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:21,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:21,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100762028] [2023-11-24 21:58:21,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:21,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:21,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:21,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 142 [2023-11-24 21:58:21,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 122 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 21:58:21,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:21,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 142 [2023-11-24 21:58:21,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:21,691 INFO L124 PetriNetUnfolderBase]: 1079/2972 cut-off events. [2023-11-24 21:58:21,691 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-24 21:58:21,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 2972 events. 1079/2972 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 23499 event pairs, 831 based on Foata normal form. 2/2068 useless extension candidates. Maximal degree in co-relation 4686. Up to 1707 conditions per place. [2023-11-24 21:58:21,723 INFO L140 encePairwiseOnDemand]: 137/142 looper letters, 46 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2023-11-24 21:58:21,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 348 flow [2023-11-24 21:58:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:58:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-11-24 21:58:21,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742957746478874 [2023-11-24 21:58:21,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-11-24 21:58:21,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-11-24 21:58:21,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:21,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-11-24 21:58:21,728 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 21:58:21,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:21,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:21,731 INFO L175 Difference]: Start difference. First operand has 121 places, 122 transitions, 254 flow. Second operand 4 states and 383 transitions. [2023-11-24 21:58:21,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 348 flow [2023-11-24 21:58:21,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 120 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:21,735 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 250 flow [2023-11-24 21:58:21,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2023-11-24 21:58:21,738 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -16 predicate places. [2023-11-24 21:58:21,738 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 250 flow [2023-11-24 21:58:21,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 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 21:58:21,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:21,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:21,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:58:21,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:21,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -495210249, now seen corresponding path program 1 times [2023-11-24 21:58:21,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:21,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132484817] [2023-11-24 21:58:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:21,888 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 21:58:21,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132484817] [2023-11-24 21:58:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132484817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:21,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172007409] [2023-11-24 21:58:21,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:21,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 142 [2023-11-24 21:58:21,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 21:58:21,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:21,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 142 [2023-11-24 21:58:21,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:22,625 INFO L124 PetriNetUnfolderBase]: 1736/4461 cut-off events. [2023-11-24 21:58:22,625 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-24 21:58:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7136 conditions, 4461 events. 1736/4461 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 37053 event pairs, 1369 based on Foata normal form. 0/3158 useless extension candidates. Maximal degree in co-relation 7121. Up to 2653 conditions per place. [2023-11-24 21:58:22,659 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 49 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-11-24 21:58:22,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 348 flow [2023-11-24 21:58:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-11-24 21:58:22,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948356807511737 [2023-11-24 21:58:22,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-11-24 21:58:22,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-11-24 21:58:22,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:22,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-11-24 21:58:22,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 21:58:22,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:22,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:22,666 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 250 flow. Second operand 3 states and 296 transitions. [2023-11-24 21:58:22,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 348 flow [2023-11-24 21:58:22,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:22,671 INFO L231 Difference]: Finished difference. Result has 116 places, 118 transitions, 244 flow [2023-11-24 21:58:22,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=116, PETRI_TRANSITIONS=118} [2023-11-24 21:58:22,674 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -19 predicate places. [2023-11-24 21:58:22,674 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 118 transitions, 244 flow [2023-11-24 21:58:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 21:58:22,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:22,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:22,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:58:22,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:22,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash -495210248, now seen corresponding path program 1 times [2023-11-24 21:58:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:22,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230779483] [2023-11-24 21:58:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:22,827 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 21:58:22,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:22,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230779483] [2023-11-24 21:58:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230779483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:22,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:22,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:22,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379638089] [2023-11-24 21:58:22,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:22,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:22,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 142 [2023-11-24 21:58:22,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 118 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:22,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:22,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 142 [2023-11-24 21:58:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:23,307 INFO L124 PetriNetUnfolderBase]: 1079/2960 cut-off events. [2023-11-24 21:58:23,308 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:58:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2960 events. 1079/2960 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 23357 event pairs, 831 based on Foata normal form. 289/2355 useless extension candidates. Maximal degree in co-relation 4678. Up to 1707 conditions per place. [2023-11-24 21:58:23,327 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 47 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-24 21:58:23,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 338 flow [2023-11-24 21:58:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-11-24 21:58:23,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704225352112676 [2023-11-24 21:58:23,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-11-24 21:58:23,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-11-24 21:58:23,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:23,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-11-24 21:58:23,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 21:58:23,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:23,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:23,334 INFO L175 Difference]: Start difference. First operand has 116 places, 118 transitions, 244 flow. Second operand 3 states and 300 transitions. [2023-11-24 21:58:23,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 338 flow [2023-11-24 21:58:23,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:23,339 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 240 flow [2023-11-24 21:58:23,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2023-11-24 21:58:23,343 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -21 predicate places. [2023-11-24 21:58:23,343 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 240 flow [2023-11-24 21:58:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:23,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:23,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:23,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:58:23,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:23,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:23,345 INFO L85 PathProgramCache]: Analyzing trace with hash 404867781, now seen corresponding path program 1 times [2023-11-24 21:58:23,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:23,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016944152] [2023-11-24 21:58:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:23,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:23,431 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 21:58:23,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:23,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016944152] [2023-11-24 21:58:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016944152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:23,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:23,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918469951] [2023-11-24 21:58:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:23,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 142 [2023-11-24 21:58:23,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 21:58:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 142 [2023-11-24 21:58:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:23,876 INFO L124 PetriNetUnfolderBase]: 1120/3057 cut-off events. [2023-11-24 21:58:23,876 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:58:23,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4862 conditions, 3057 events. 1120/3057 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 24191 event pairs, 865 based on Foata normal form. 0/2152 useless extension candidates. Maximal degree in co-relation 4852. Up to 1783 conditions per place. [2023-11-24 21:58:23,895 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 49 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-24 21:58:23,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 114 transitions, 338 flow [2023-11-24 21:58:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-11-24 21:58:23,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948356807511737 [2023-11-24 21:58:23,898 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-11-24 21:58:23,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-11-24 21:58:23,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:23,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-11-24 21:58:23,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 21:58:23,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:23,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:23,901 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 240 flow. Second operand 3 states and 296 transitions. [2023-11-24 21:58:23,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 114 transitions, 338 flow [2023-11-24 21:58:23,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:23,904 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2023-11-24 21:58:23,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2023-11-24 21:58:23,906 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -23 predicate places. [2023-11-24 21:58:23,906 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2023-11-24 21:58:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 21:58:23,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:23,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:58:23,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:23,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 404867782, now seen corresponding path program 1 times [2023-11-24 21:58:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:23,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465293125] [2023-11-24 21:58:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:23,998 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 21:58:23,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:23,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465293125] [2023-11-24 21:58:23,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465293125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:23,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:23,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584407841] [2023-11-24 21:58:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:24,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:24,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:24,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 142 [2023-11-24 21:58:24,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 21:58:24,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:24,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 142 [2023-11-24 21:58:24,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:24,437 INFO L124 PetriNetUnfolderBase]: 1079/2938 cut-off events. [2023-11-24 21:58:24,437 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:58:24,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4666 conditions, 2938 events. 1079/2938 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 23063 event pairs, 831 based on Foata normal form. 31/2097 useless extension candidates. Maximal degree in co-relation 4656. Up to 1707 conditions per place. [2023-11-24 21:58:24,456 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 47 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-11-24 21:58:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 330 flow [2023-11-24 21:58:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-11-24 21:58:24,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.704225352112676 [2023-11-24 21:58:24,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-11-24 21:58:24,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-11-24 21:58:24,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:24,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-11-24 21:58:24,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 21:58:24,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:24,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:24,462 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 300 transitions. [2023-11-24 21:58:24,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 330 flow [2023-11-24 21:58:24,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 112 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:24,465 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 232 flow [2023-11-24 21:58:24,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2023-11-24 21:58:24,466 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -25 predicate places. [2023-11-24 21:58:24,466 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 232 flow [2023-11-24 21:58:24,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 21:58:24,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:24,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:24,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:58:24,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -495378663, now seen corresponding path program 1 times [2023-11-24 21:58:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:24,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915456073] [2023-11-24 21:58:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:24,722 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 21:58:24,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:24,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915456073] [2023-11-24 21:58:24,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915456073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:24,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:24,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842637810] [2023-11-24 21:58:24,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:24,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:25,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 142 [2023-11-24 21:58:25,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 79.83333333333333) internal successors, (479), 6 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 21:58:25,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:25,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 142 [2023-11-24 21:58:25,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:25,638 INFO L124 PetriNetUnfolderBase]: 1078/2725 cut-off events. [2023-11-24 21:58:25,638 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-24 21:58:25,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4450 conditions, 2725 events. 1078/2725 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 20412 event pairs, 434 based on Foata normal form. 126/2213 useless extension candidates. Maximal degree in co-relation 4440. Up to 889 conditions per place. [2023-11-24 21:58:25,656 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 68 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-11-24 21:58:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 129 transitions, 413 flow [2023-11-24 21:58:25,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:58:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:58:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 548 transitions. [2023-11-24 21:58:25,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431924882629108 [2023-11-24 21:58:25,659 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 548 transitions. [2023-11-24 21:58:25,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 548 transitions. [2023-11-24 21:58:25,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:25,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 548 transitions. [2023-11-24 21:58:25,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 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 21:58:25,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 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 21:58:25,664 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 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 21:58:25,665 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 232 flow. Second operand 6 states and 548 transitions. [2023-11-24 21:58:25,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 129 transitions, 413 flow [2023-11-24 21:58:25,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:25,668 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 224 flow [2023-11-24 21:58:25,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2023-11-24 21:58:25,670 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -29 predicate places. [2023-11-24 21:58:25,670 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 224 flow [2023-11-24 21:58:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.83333333333333) internal successors, (479), 6 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 21:58:25,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:25,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:58:25,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:25,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -495378664, now seen corresponding path program 1 times [2023-11-24 21:58:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729343859] [2023-11-24 21:58:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:25,779 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 21:58:25,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729343859] [2023-11-24 21:58:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729343859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:25,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992041017] [2023-11-24 21:58:25,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:26,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-11-24 21:58:26,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 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 21:58:26,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:26,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-11-24 21:58:26,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:26,453 INFO L124 PetriNetUnfolderBase]: 1276/2627 cut-off events. [2023-11-24 21:58:26,454 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-24 21:58:26,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 2627 events. 1276/2627 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 16867 event pairs, 446 based on Foata normal form. 0/2153 useless extension candidates. Maximal degree in co-relation 1978. Up to 1138 conditions per place. [2023-11-24 21:58:26,470 INFO L140 encePairwiseOnDemand]: 129/142 looper letters, 73 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2023-11-24 21:58:26,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 121 transitions, 413 flow [2023-11-24 21:58:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:58:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 431 transitions. [2023-11-24 21:58:26,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070422535211267 [2023-11-24 21:58:26,473 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 431 transitions. [2023-11-24 21:58:26,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 431 transitions. [2023-11-24 21:58:26,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:26,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 431 transitions. [2023-11-24 21:58:26,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 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 21:58:26,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 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 21:58:26,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 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 21:58:26,478 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 224 flow. Second operand 5 states and 431 transitions. [2023-11-24 21:58:26,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 121 transitions, 413 flow [2023-11-24 21:58:26,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 403 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-24 21:58:26,484 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 208 flow [2023-11-24 21:58:26,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2023-11-24 21:58:26,486 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -38 predicate places. [2023-11-24 21:58:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 208 flow [2023-11-24 21:58:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 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 21:58:26,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:26,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:58:26,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:26,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1823131262, now seen corresponding path program 1 times [2023-11-24 21:58:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059869641] [2023-11-24 21:58:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:27,143 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 21:58:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059869641] [2023-11-24 21:58:27,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059869641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:27,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:27,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:58:27,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634387307] [2023-11-24 21:58:27,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:58:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:58:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:58:27,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 142 [2023-11-24 21:58:27,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 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 21:58:27,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:27,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 142 [2023-11-24 21:58:27,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:28,784 INFO L124 PetriNetUnfolderBase]: 2060/4303 cut-off events. [2023-11-24 21:58:28,784 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-24 21:58:28,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7724 conditions, 4303 events. 2060/4303 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 30361 event pairs, 286 based on Foata normal form. 0/3498 useless extension candidates. Maximal degree in co-relation 2867. Up to 2158 conditions per place. [2023-11-24 21:58:28,809 INFO L140 encePairwiseOnDemand]: 132/142 looper letters, 133 selfloop transitions, 12 changer transitions 0/188 dead transitions. [2023-11-24 21:58:28,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 188 transitions, 689 flow [2023-11-24 21:58:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:58:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:58:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 715 transitions. [2023-11-24 21:58:28,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294014084507042 [2023-11-24 21:58:28,813 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 715 transitions. [2023-11-24 21:58:28,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 715 transitions. [2023-11-24 21:58:28,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:28,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 715 transitions. [2023-11-24 21:58:28,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 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 21:58:28,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 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 21:58:28,822 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 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 21:58:28,822 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 208 flow. Second operand 8 states and 715 transitions. [2023-11-24 21:58:28,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 188 transitions, 689 flow [2023-11-24 21:58:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 188 transitions, 675 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:58:28,828 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 274 flow [2023-11-24 21:58:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=274, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2023-11-24 21:58:28,829 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -31 predicate places. [2023-11-24 21:58:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 274 flow [2023-11-24 21:58:28,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.625) internal successors, (581), 8 states have internal predecessors, (581), 0 states have call successors, (0), 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 21:58:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:58:28,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:28,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1765301932, now seen corresponding path program 1 times [2023-11-24 21:58:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448330650] [2023-11-24 21:58:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:28,964 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 21:58:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448330650] [2023-11-24 21:58:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448330650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:28,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:58:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251542250] [2023-11-24 21:58:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:58:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:58:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:58:29,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 142 [2023-11-24 21:58:29,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 107 transitions, 274 flow. Second operand has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 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 21:58:29,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:29,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 142 [2023-11-24 21:58:29,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:29,852 INFO L124 PetriNetUnfolderBase]: 1881/4238 cut-off events. [2023-11-24 21:58:29,853 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2023-11-24 21:58:29,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4238 events. 1881/4238 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 31909 event pairs, 1238 based on Foata normal form. 0/3457 useless extension candidates. Maximal degree in co-relation 7461. Up to 2632 conditions per place. [2023-11-24 21:58:29,882 INFO L140 encePairwiseOnDemand]: 135/142 looper letters, 77 selfloop transitions, 5 changer transitions 0/127 dead transitions. [2023-11-24 21:58:29,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 127 transitions, 499 flow [2023-11-24 21:58:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:58:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:58:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 457 transitions. [2023-11-24 21:58:29,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.643661971830986 [2023-11-24 21:58:29,885 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 457 transitions. [2023-11-24 21:58:29,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 457 transitions. [2023-11-24 21:58:29,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:29,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 457 transitions. [2023-11-24 21:58:29,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 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 21:58:29,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 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 21:58:29,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 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 21:58:29,890 INFO L175 Difference]: Start difference. First operand has 104 places, 107 transitions, 274 flow. Second operand 5 states and 457 transitions. [2023-11-24 21:58:29,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 127 transitions, 499 flow [2023-11-24 21:58:29,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 127 transitions, 495 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:29,895 INFO L231 Difference]: Finished difference. Result has 104 places, 105 transitions, 276 flow [2023-11-24 21:58:29,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=104, PETRI_TRANSITIONS=105} [2023-11-24 21:58:29,896 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -31 predicate places. [2023-11-24 21:58:29,896 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 105 transitions, 276 flow [2023-11-24 21:58:29,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 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 21:58:29,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:29,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:29,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:58:29,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:29,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1765301933, now seen corresponding path program 1 times [2023-11-24 21:58:29,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:29,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353591076] [2023-11-24 21:58:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:29,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:29,980 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 21:58:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353591076] [2023-11-24 21:58:29,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353591076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:29,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:29,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369623763] [2023-11-24 21:58:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:29,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:29,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:29,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2023-11-24 21:58:29,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 105 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 21:58:29,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:29,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2023-11-24 21:58:29,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:30,248 INFO L124 PetriNetUnfolderBase]: 693/1675 cut-off events. [2023-11-24 21:58:30,248 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-24 21:58:30,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1675 events. 693/1675 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10577 event pairs, 447 based on Foata normal form. 43/1501 useless extension candidates. Maximal degree in co-relation 3129. Up to 698 conditions per place. [2023-11-24 21:58:30,261 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 62 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-11-24 21:58:30,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 113 transitions, 415 flow [2023-11-24 21:58:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-24 21:58:30,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.744131455399061 [2023-11-24 21:58:30,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-24 21:58:30,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-24 21:58:30,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:30,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-24 21:58:30,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:58:30,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:30,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:30,267 INFO L175 Difference]: Start difference. First operand has 104 places, 105 transitions, 276 flow. Second operand 3 states and 317 transitions. [2023-11-24 21:58:30,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 113 transitions, 415 flow [2023-11-24 21:58:30,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 401 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-24 21:58:30,272 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 255 flow [2023-11-24 21:58:30,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2023-11-24 21:58:30,274 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -34 predicate places. [2023-11-24 21:58:30,274 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 255 flow [2023-11-24 21:58:30,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 21:58:30,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:30,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:58:30,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:30,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 893561673, now seen corresponding path program 1 times [2023-11-24 21:58:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283758192] [2023-11-24 21:58:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:30,335 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 21:58:30,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:30,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283758192] [2023-11-24 21:58:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283758192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:30,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:30,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587421766] [2023-11-24 21:58:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:30,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2023-11-24 21:58:30,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 21:58:30,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:30,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2023-11-24 21:58:30,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:30,608 INFO L124 PetriNetUnfolderBase]: 572/1398 cut-off events. [2023-11-24 21:58:30,608 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-24 21:58:30,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2689 conditions, 1398 events. 572/1398 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7860 event pairs, 380 based on Foata normal form. 12/1232 useless extension candidates. Maximal degree in co-relation 1719. Up to 763 conditions per place. [2023-11-24 21:58:30,616 INFO L140 encePairwiseOnDemand]: 139/142 looper letters, 64 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-24 21:58:30,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 114 transitions, 411 flow [2023-11-24 21:58:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-11-24 21:58:30,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.755868544600939 [2023-11-24 21:58:30,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-11-24 21:58:30,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-11-24 21:58:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:30,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-11-24 21:58:30,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 21:58:30,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:30,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:30,622 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 255 flow. Second operand 3 states and 322 transitions. [2023-11-24 21:58:30,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 114 transitions, 411 flow [2023-11-24 21:58:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 403 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:30,627 INFO L231 Difference]: Finished difference. Result has 102 places, 101 transitions, 254 flow [2023-11-24 21:58:30,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=102, PETRI_TRANSITIONS=101} [2023-11-24 21:58:30,628 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -33 predicate places. [2023-11-24 21:58:30,628 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 101 transitions, 254 flow [2023-11-24 21:58:30,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 21:58:30,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:30,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:30,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:58:30,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:30,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1790474274, now seen corresponding path program 1 times [2023-11-24 21:58:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:30,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267161309] [2023-11-24 21:58:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:31,215 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 21:58:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267161309] [2023-11-24 21:58:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267161309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:31,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:58:31,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794753743] [2023-11-24 21:58:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:58:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:58:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:58:31,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 142 [2023-11-24 21:58:31,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 101 transitions, 254 flow. Second operand has 9 states, 9 states have (on average 82.11111111111111) internal successors, (739), 9 states have internal predecessors, (739), 0 states have call successors, (0), 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 21:58:31,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:31,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 142 [2023-11-24 21:58:31,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:32,072 INFO L124 PetriNetUnfolderBase]: 643/1459 cut-off events. [2023-11-24 21:58:32,073 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-24 21:58:32,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2904 conditions, 1459 events. 643/1459 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7879 event pairs, 168 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 954. Up to 773 conditions per place. [2023-11-24 21:58:32,082 INFO L140 encePairwiseOnDemand]: 132/142 looper letters, 95 selfloop transitions, 9 changer transitions 0/145 dead transitions. [2023-11-24 21:58:32,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 145 transitions, 554 flow [2023-11-24 21:58:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:58:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:58:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-11-24 21:58:32,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6447574334898278 [2023-11-24 21:58:32,092 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-11-24 21:58:32,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-11-24 21:58:32,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:32,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-11-24 21:58:32,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 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 21:58:32,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 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 21:58:32,101 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 142.0) internal successors, (1420), 10 states have internal predecessors, (1420), 0 states have call successors, (0), 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 21:58:32,101 INFO L175 Difference]: Start difference. First operand has 102 places, 101 transitions, 254 flow. Second operand 9 states and 824 transitions. [2023-11-24 21:58:32,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 145 transitions, 554 flow [2023-11-24 21:58:32,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 550 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:58:32,107 INFO L231 Difference]: Finished difference. Result has 111 places, 102 transitions, 279 flow [2023-11-24 21:58:32,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=279, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2023-11-24 21:58:32,109 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -24 predicate places. [2023-11-24 21:58:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 279 flow [2023-11-24 21:58:32,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.11111111111111) internal successors, (739), 9 states have internal predecessors, (739), 0 states have call successors, (0), 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 21:58:32,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:32,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:58:32,110 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:32,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash -328796433, now seen corresponding path program 1 times [2023-11-24 21:58:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074675204] [2023-11-24 21:58:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:32,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:32,409 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 21:58:32,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074675204] [2023-11-24 21:58:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074675204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:32,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816260505] [2023-11-24 21:58:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:32,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:32,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 142 [2023-11-24 21:58:32,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 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 21:58:32,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:32,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 142 [2023-11-24 21:58:32,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:32,874 INFO L124 PetriNetUnfolderBase]: 575/1377 cut-off events. [2023-11-24 21:58:32,874 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-11-24 21:58:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1377 events. 575/1377 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7588 event pairs, 395 based on Foata normal form. 12/1247 useless extension candidates. Maximal degree in co-relation 1572. Up to 789 conditions per place. [2023-11-24 21:58:32,883 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 63 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-11-24 21:58:32,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 113 transitions, 434 flow [2023-11-24 21:58:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:58:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2023-11-24 21:58:32,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7095070422535211 [2023-11-24 21:58:32,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 403 transitions. [2023-11-24 21:58:32,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 403 transitions. [2023-11-24 21:58:32,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:32,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 403 transitions. [2023-11-24 21:58:32,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 21:58:32,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:32,890 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:58:32,890 INFO L175 Difference]: Start difference. First operand has 111 places, 102 transitions, 279 flow. Second operand 4 states and 403 transitions. [2023-11-24 21:58:32,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 113 transitions, 434 flow [2023-11-24 21:58:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 113 transitions, 420 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-24 21:58:32,895 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 275 flow [2023-11-24 21:58:32,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2023-11-24 21:58:32,896 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -26 predicate places. [2023-11-24 21:58:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 275 flow [2023-11-24 21:58:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 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 21:58:32,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:32,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:58:32,897 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash -328796434, now seen corresponding path program 1 times [2023-11-24 21:58:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557683045] [2023-11-24 21:58:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:32,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:33,056 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 21:58:33,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:33,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557683045] [2023-11-24 21:58:33,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557683045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:33,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:33,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25551560] [2023-11-24 21:58:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:33,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:33,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 142 [2023-11-24 21:58:33,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 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 21:58:33,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:33,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 142 [2023-11-24 21:58:33,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:33,503 INFO L124 PetriNetUnfolderBase]: 901/1966 cut-off events. [2023-11-24 21:58:33,504 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-11-24 21:58:33,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 1966 events. 901/1966 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 11095 event pairs, 837 based on Foata normal form. 34/1816 useless extension candidates. Maximal degree in co-relation 1672. Up to 1532 conditions per place. [2023-11-24 21:58:33,516 INFO L140 encePairwiseOnDemand]: 138/142 looper letters, 55 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-11-24 21:58:33,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 385 flow [2023-11-24 21:58:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-11-24 21:58:33,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6901408450704225 [2023-11-24 21:58:33,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-11-24 21:58:33,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-11-24 21:58:33,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:33,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-11-24 21:58:33,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 21:58:33,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:33,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 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 21:58:33,521 INFO L175 Difference]: Start difference. First operand has 109 places, 102 transitions, 275 flow. Second operand 3 states and 294 transitions. [2023-11-24 21:58:33,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 385 flow [2023-11-24 21:58:33,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 100 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:33,526 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 269 flow [2023-11-24 21:58:33,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2023-11-24 21:58:33,527 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -29 predicate places. [2023-11-24 21:58:33,527 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 269 flow [2023-11-24 21:58:33,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 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 21:58:33,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:33,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 21:58:33,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:58:33,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-24 21:58:33,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1646577762, now seen corresponding path program 1 times [2023-11-24 21:58:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239379338] [2023-11-24 21:58:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:34,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239379338] [2023-11-24 21:58:34,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239379338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704147806] [2023-11-24 21:58:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:34,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:34,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a93b345-1b98-4ca4-9674-9d3ecea5e286/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:58:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:34,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-24 21:58:34,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:34,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:58:35,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:58:35,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-24 21:58:35,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-24 21:58:35,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 21:58:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:35,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:37,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:58:37,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 131 [2023-11-24 21:58:37,538 INFO L349 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2023-11-24 21:58:37,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 121 [2023-11-24 21:58:37,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:58:37,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 86 [2023-11-24 21:58:37,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:58:37,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:58:37,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 95 [2023-11-24 21:58:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:58:37,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-24 21:58:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:58:37,771 INFO L349 Elim1Store]: treesize reduction 47, result has 39.7 percent of original size [2023-11-24 21:58:37,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 98 [2023-11-24 21:58:37,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2023-11-24 21:58:37,815 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2023-11-24 21:58:37,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 69 [2023-11-24 21:58:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:37,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704147806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:37,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 31 [2023-11-24 21:58:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603377054] [2023-11-24 21:58:37,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-24 21:58:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-24 21:58:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 21:58:43,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-24 21:58:47,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-24 21:58:53,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-24 21:58:58,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-24 21:59:00,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]