./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-wmm/safe002_power.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/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_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-wmm/safe002_power.oepc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/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_11501ed0-7b65-4725-8ddf-1446c5eda8e5/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 7a9379df521a7077d18fd2276dc35da388f77854d23421e689a681d711c31769 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:55,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:55,186 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:59:55,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:55,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:55,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:55,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:55,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:55,238 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:55,242 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:55,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:55,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:55,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:55,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:55,247 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:55,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:55,248 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:55,249 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:55,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:55,250 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:55,250 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:59:55,251 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:59:55,251 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:59:55,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:55,252 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:59:55,253 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:59:55,253 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:55,254 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:55,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:55,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:55,256 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:55,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:55,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:55,257 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:55,258 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:55,258 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:55,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:55,259 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:55,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:55,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:55,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:55,260 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_11501ed0-7b65-4725-8ddf-1446c5eda8e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a9379df521a7077d18fd2276dc35da388f77854d23421e689a681d711c31769 [2023-11-24 21:59:55,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:55,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:55,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:55,589 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:55,589 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:55,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-wmm/safe002_power.oepc.i [2023-11-24 21:59:58,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:59,113 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:59,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/sv-benchmarks/c/pthread-wmm/safe002_power.oepc.i [2023-11-24 21:59:59,139 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/data/642361a60/51c05c2baa3f4d88bc056483c487ef12/FLAG4a8c0ced4 [2023-11-24 21:59:59,155 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/data/642361a60/51c05c2baa3f4d88bc056483c487ef12 [2023-11-24 21:59:59,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:59,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:59,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:59,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:59,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:59,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:59" (1/1) ... [2023-11-24 21:59:59,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1033ecec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59, skipping insertion in model container [2023-11-24 21:59:59,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:59" (1/1) ... [2023-11-24 21:59:59,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:59,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:59,795 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:59,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:59,914 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:59:59,914 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:59:59,922 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:59,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59 WrapperNode [2023-11-24 21:59:59,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:59,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:59,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:59,925 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:59,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 21:59:59,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 21:59:59,994 INFO L138 Inliner]: procedures = 176, calls = 85, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2023-11-24 22:00:00,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:00,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:00:00,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:00:00,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:00:00,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,045 INFO L175 MemorySlicer]: Split 35 memory accesses to 5 slices as follows [2, 1, 30, 1, 1]. 86 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1, 0, 0]. The 14 writes are split as follows [0, 1, 11, 1, 1]. [2023-11-24 22:00:00,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,093 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:00:00,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:00:00,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:00:00,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:00:00,095 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (1/1) ... [2023-11-24 22:00:00,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:00,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:00,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:00:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11501ed0-7b65-4725-8ddf-1446c5eda8e5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:00:00,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:00:00,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:00:00,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:00:00,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 22:00:00,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 22:00:00,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 22:00:00,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:00:00,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:00:00,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:00:00,207 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-11-24 22:00:00,207 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-11-24 22:00:00,207 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-11-24 22:00:00,208 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-11-24 22:00:00,208 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-11-24 22:00:00,208 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 22:00:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 22:00:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:00:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:00:00,212 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 22:00:00,469 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:00:00,471 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:00:01,175 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:00:02,129 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:00:02,129 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-24 22:00:02,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:02 BoogieIcfgContainer [2023-11-24 22:00:02,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:00:02,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:00:02,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:00:02,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:00:02,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:59" (1/3) ... [2023-11-24 22:00:02,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b77ef58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:02, skipping insertion in model container [2023-11-24 22:00:02,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:59" (2/3) ... [2023-11-24 22:00:02,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b77ef58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:02, skipping insertion in model container [2023-11-24 22:00:02,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:02" (3/3) ... [2023-11-24 22:00:02,144 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_power.oepc.i [2023-11-24 22:00:02,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:00:02,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2023-11-24 22:00:02,168 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 22:00:02,386 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 22:00:02,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 110 transitions, 232 flow [2023-11-24 22:00:02,514 INFO L124 PetriNetUnfolderBase]: 2/107 cut-off events. [2023-11-24 22:00:02,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:00:02,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 107 events. 2/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 483 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-11-24 22:00:02,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 110 transitions, 232 flow [2023-11-24 22:00:02,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 107 transitions, 223 flow [2023-11-24 22:00:02,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:00:02,547 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;@70d43cd5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:00:02,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 109 error locations. [2023-11-24 22:00:02,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 22:00:02,553 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 22:00:02,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 22:00:02,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:02,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:00:02,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:02,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash 33154, now seen corresponding path program 1 times [2023-11-24 22:00:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696504957] [2023-11-24 22:00:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:02,938 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 22:00:02,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:02,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696504957] [2023-11-24 22:00:02,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696504957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:02,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:00:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712831347] [2023-11-24 22:00:02,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:02,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:03,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 110 [2023-11-24 22:00:03,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 22:00:03,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:03,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 110 [2023-11-24 22:00:03,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:14,108 INFO L124 PetriNetUnfolderBase]: 28514/42686 cut-off events. [2023-11-24 22:00:14,108 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-24 22:00:14,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82479 conditions, 42686 events. 28514/42686 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 359378 event pairs, 25104 based on Foata normal form. 1300/20424 useless extension candidates. Maximal degree in co-relation 82465. Up to 34966 conditions per place. [2023-11-24 22:00:14,553 INFO L140 encePairwiseOnDemand]: 71/110 looper letters, 71 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-11-24 22:00:14,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 94 transitions, 343 flow [2023-11-24 22:00:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:00:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-11-24 22:00:14,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242424242424243 [2023-11-24 22:00:14,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-11-24 22:00:14,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-11-24 22:00:14,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:14,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-11-24 22:00:14,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 22:00:14,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:14,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:14,597 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 223 flow. Second operand 3 states and 206 transitions. [2023-11-24 22:00:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 94 transitions, 343 flow [2023-11-24 22:00:14,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 22:00:14,613 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 148 flow [2023-11-24 22:00:14,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-11-24 22:00:14,619 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -37 predicate places. [2023-11-24 22:00:14,620 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 148 flow [2023-11-24 22:00:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 22:00:14,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:14,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 22:00:14,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:00:14,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:14,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash 33155, now seen corresponding path program 1 times [2023-11-24 22:00:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562915311] [2023-11-24 22:00:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:14,832 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 22:00:14,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562915311] [2023-11-24 22:00:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562915311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:14,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:14,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 22:00:14,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888326742] [2023-11-24 22:00:14,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:14,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:14,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-24 22:00:14,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:00:14,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:14,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-24 22:00:14,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:23,764 INFO L124 PetriNetUnfolderBase]: 28514/42685 cut-off events. [2023-11-24 22:00:23,764 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 22:00:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83126 conditions, 42685 events. 28514/42685 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 359786 event pairs, 25104 based on Foata normal form. 1/19124 useless extension candidates. Maximal degree in co-relation 83115. Up to 34965 conditions per place. [2023-11-24 22:00:24,069 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 70 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-24 22:00:24,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 340 flow [2023-11-24 22:00:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:00:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-24 22:00:24,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2023-11-24 22:00:24,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-24 22:00:24,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-24 22:00:24,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:24,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-24 22:00:24,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:24,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:24,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:24,077 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 148 flow. Second operand 3 states and 148 transitions. [2023-11-24 22:00:24,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 340 flow [2023-11-24 22:00:24,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:00:24,242 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 146 flow [2023-11-24 22:00:24,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2023-11-24 22:00:24,244 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -38 predicate places. [2023-11-24 22:00:24,244 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 146 flow [2023-11-24 22:00:24,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:00:24,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:24,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:00:24,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:24,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 988797697, now seen corresponding path program 1 times [2023-11-24 22:00:24,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:24,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832016227] [2023-11-24 22:00:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:24,352 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 22:00:24,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:24,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832016227] [2023-11-24 22:00:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832016227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441783592] [2023-11-24 22:00:24,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:24,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:24,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:24,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:24,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 110 [2023-11-24 22:00:24,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 22:00:24,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:24,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 110 [2023-11-24 22:00:24,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:32,907 INFO L124 PetriNetUnfolderBase]: 28518/42556 cut-off events. [2023-11-24 22:00:32,907 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-11-24 22:00:32,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83006 conditions, 42556 events. 28518/42556 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 356937 event pairs, 25234 based on Foata normal form. 0/19003 useless extension candidates. Maximal degree in co-relation 82995. Up to 34968 conditions per place. [2023-11-24 22:00:33,192 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 71 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-24 22:00:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 340 flow [2023-11-24 22:00:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:00:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-11-24 22:00:33,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-11-24 22:00:33,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-11-24 22:00:33,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-11-24 22:00:33,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:33,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-11-24 22:00:33,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:33,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:33,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:33,204 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 146 flow. Second operand 3 states and 146 transitions. [2023-11-24 22:00:33,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 340 flow [2023-11-24 22:00:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:00:33,315 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 144 flow [2023-11-24 22:00:33,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2023-11-24 22:00:33,317 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -39 predicate places. [2023-11-24 22:00:33,317 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 144 flow [2023-11-24 22:00:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 22:00:33,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:33,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:00:33,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:33,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 988797698, now seen corresponding path program 1 times [2023-11-24 22:00:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052359841] [2023-11-24 22:00:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:33,434 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 22:00:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:33,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052359841] [2023-11-24 22:00:33,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052359841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:33,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:33,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990576136] [2023-11-24 22:00:33,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:33,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:33,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:33,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-24 22:00:33,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:00:33,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:33,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-24 22:00:33,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:41,993 INFO L124 PetriNetUnfolderBase]: 28514/42548 cut-off events. [2023-11-24 22:00:41,993 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-24 22:00:42,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82993 conditions, 42548 events. 28514/42548 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 359110 event pairs, 25230 based on Foata normal form. 5/18991 useless extension candidates. Maximal degree in co-relation 82983. Up to 34959 conditions per place. [2023-11-24 22:00:42,310 INFO L140 encePairwiseOnDemand]: 107/110 looper letters, 70 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-24 22:00:42,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 336 flow [2023-11-24 22:00:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 22:00:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2023-11-24 22:00:42,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2023-11-24 22:00:42,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 148 transitions. [2023-11-24 22:00:42,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 148 transitions. [2023-11-24 22:00:42,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:42,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 148 transitions. [2023-11-24 22:00:42,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:42,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:42,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 22:00:42,321 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 144 flow. Second operand 3 states and 148 transitions. [2023-11-24 22:00:42,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 336 flow [2023-11-24 22:00:42,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:00:42,443 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 142 flow [2023-11-24 22:00:42,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-24 22:00:42,446 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -40 predicate places. [2023-11-24 22:00:42,446 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 142 flow [2023-11-24 22:00:42,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:00:42,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:42,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:42,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:00:42,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:42,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash 988798043, now seen corresponding path program 1 times [2023-11-24 22:00:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999511005] [2023-11-24 22:00:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,587 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 22:00:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999511005] [2023-11-24 22:00:42,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999511005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:42,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387442451] [2023-11-24 22:00:42,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:42,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:00:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:00:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:00:42,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-24 22:00:42,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 22:00:42,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:42,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-24 22:00:42,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:46,692 INFO L124 PetriNetUnfolderBase]: 11953/19039 cut-off events. [2023-11-24 22:00:46,693 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-24 22:00:46,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 19039 events. 11953/19039 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1474. Compared 158768 event pairs, 8045 based on Foata normal form. 0/11168 useless extension candidates. Maximal degree in co-relation 36816. Up to 10483 conditions per place. [2023-11-24 22:00:46,808 INFO L140 encePairwiseOnDemand]: 91/110 looper letters, 72 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2023-11-24 22:00:46,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 366 flow [2023-11-24 22:00:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:00:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:00:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2023-11-24 22:00:46,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2023-11-24 22:00:46,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 199 transitions. [2023-11-24 22:00:46,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 199 transitions. [2023-11-24 22:00:46,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:46,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 199 transitions. [2023-11-24 22:00:46,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 22:00:46,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 22:00:46,815 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 22:00:46,815 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 142 flow. Second operand 4 states and 199 transitions. [2023-11-24 22:00:46,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 366 flow [2023-11-24 22:00:46,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 22:00:46,823 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 220 flow [2023-11-24 22:00:46,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-11-24 22:00:46,824 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -39 predicate places. [2023-11-24 22:00:46,824 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 220 flow [2023-11-24 22:00:46,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 22:00:46,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:46,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:00:46,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:46,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash 988798044, now seen corresponding path program 1 times [2023-11-24 22:00:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:46,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609161588] [2023-11-24 22:00:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,915 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 22:00:46,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:46,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609161588] [2023-11-24 22:00:46,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609161588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:46,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:46,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:46,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897643690] [2023-11-24 22:00:46,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:46,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:00:46,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:00:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:00:46,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 110 [2023-11-24 22:00:46,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 22:00:46,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:46,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 110 [2023-11-24 22:00:46,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 22:00:48,101 INFO L124 PetriNetUnfolderBase]: 2646/4705 cut-off events. [2023-11-24 22:00:48,101 INFO L125 PetriNetUnfolderBase]: For 1955/1955 co-relation queries the response was YES. [2023-11-24 22:00:48,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12175 conditions, 4705 events. 2646/4705 cut-off events. For 1955/1955 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36078 event pairs, 1762 based on Foata normal form. 1592/6011 useless extension candidates. Maximal degree in co-relation 12161. Up to 2398 conditions per place. [2023-11-24 22:00:48,137 INFO L140 encePairwiseOnDemand]: 97/110 looper letters, 46 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-24 22:00:48,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 324 flow [2023-11-24 22:00:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:00:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 22:00:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 165 transitions. [2023-11-24 22:00:48,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-24 22:00:48,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 165 transitions. [2023-11-24 22:00:48,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 165 transitions. [2023-11-24 22:00:48,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 22:00:48,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 165 transitions. [2023-11-24 22:00:48,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states 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 22:00:48,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 22:00:48,144 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 22:00:48,144 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 220 flow. Second operand 4 states and 165 transitions. [2023-11-24 22:00:48,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 324 flow [2023-11-24 22:00:48,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 22:00:48,153 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 200 flow [2023-11-24 22:00:48,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-11-24 22:00:48,157 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, -48 predicate places. [2023-11-24 22:00:48,157 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 200 flow [2023-11-24 22:00:48,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 22:00:48,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 22:00:48,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:48,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:00:48,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 106 more)] === [2023-11-24 22:00:48,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:48,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1907387322, now seen corresponding path program 1 times [2023-11-24 22:00:48,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470235927] [2023-11-24 22:00:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:48,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:48,269 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 22:00:48,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:48,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470235927] [2023-11-24 22:00:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470235927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:48,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:48,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750045874] [2023-11-24 22:00:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:48,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 110 [2023-11-24 22:00:48,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:48,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 22:00:48,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 110 [2023-11-24 22:00:48,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand