./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:25:56,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:25:57,050 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:25:57,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:25:57,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:25:57,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:25:57,080 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:25:57,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:25:57,081 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:25:57,082 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:25:57,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:25:57,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:25:57,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:25:57,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:25:57,085 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:25:57,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:25:57,086 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:25:57,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:25:57,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:25:57,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:25:57,086 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:25:57,089 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:25:57,089 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:25:57,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:25:57,090 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:25:57,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:25:57,090 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:25:57,090 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:25:57,090 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:25:57,091 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:25:57,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:25:57,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:25:57,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:25:57,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:25:57,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:25:57,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:25:57,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:25:57,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:25:57,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:25:57,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:25:57,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:25:57,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:25:57,094 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a3fff277216174585e9d802eee36c2b619da26d56e48ed5261f2ab62942b7a [2024-11-17 03:25:57,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:25:57,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:25:57,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:25:57,306 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:25:57,307 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:25:57,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-17 03:25:58,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:25:58,902 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:25:58,902 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr.i [2024-11-17 03:25:58,917 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbb3e709/5dda4194865a4700bd1044aaf0669c62/FLAGf246d1021 [2024-11-17 03:25:59,242 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfbb3e709/5dda4194865a4700bd1044aaf0669c62 [2024-11-17 03:25:59,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:25:59,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:25:59,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:59,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:25:59,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:25:59,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:25:59,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395aba1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59, skipping insertion in model container [2024-11-17 03:25:59,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:25:59,289 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:25:59,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:59,752 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:25:59,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:25:59,992 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:25:59,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59 WrapperNode [2024-11-17 03:25:59,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:25:59,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:25:59,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:25:59,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:26:00,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,096 INFO L138 Inliner]: procedures = 372, calls = 87, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 184 [2024-11-17 03:26:00,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:26:00,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:26:00,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:26:00,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:26:00,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,125 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,167 INFO L175 MemorySlicer]: Split 78 memory accesses to 2 slices as follows [64, 14]. 82 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60, 0]. The 11 writes are split as follows [1, 10]. [2024-11-17 03:26:00,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,188 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,200 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:26:00,213 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:26:00,213 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:26:00,213 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:26:00,213 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (1/1) ... [2024-11-17 03:26:00,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:26:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:00,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:26:00,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:26:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:26:00,309 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:26:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:26:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:26:00,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:26:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:26:00,311 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:26:00,498 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:26:00,504 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:26:00,928 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:26:00,930 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:26:01,251 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:26:01,251 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:26:01,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:26:01 BoogieIcfgContainer [2024-11-17 03:26:01,252 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:26:01,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:26:01,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:26:01,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:26:01,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:25:59" (1/3) ... [2024-11-17 03:26:01,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69edc801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:26:01, skipping insertion in model container [2024-11-17 03:26:01,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:25:59" (2/3) ... [2024-11-17 03:26:01,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69edc801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:26:01, skipping insertion in model container [2024-11-17 03:26:01,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:26:01" (3/3) ... [2024-11-17 03:26:01,262 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr.i [2024-11-17 03:26:01,276 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:26:01,277 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-11-17 03:26:01,277 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:26:01,329 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:26:01,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 79 transitions, 162 flow [2024-11-17 03:26:01,384 INFO L124 PetriNetUnfolderBase]: 4/78 cut-off events. [2024-11-17 03:26:01,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:26:01,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 78 events. 4/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 277 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-17 03:26:01,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 79 transitions, 162 flow [2024-11-17 03:26:01,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 159 flow [2024-11-17 03:26:01,395 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:26:01,399 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7131885a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:26:01,400 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-17 03:26:01,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:26:01,404 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2024-11-17 03:26:01,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:26:01,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:01,405 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:26:01,405 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:01,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1528781676, now seen corresponding path program 1 times [2024-11-17 03:26:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:01,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087980469] [2024-11-17 03:26:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:01,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:01,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087980469] [2024-11-17 03:26:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087980469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:01,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:01,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112776024] [2024-11-17 03:26:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:01,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-17 03:26:01,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-17 03:26:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-17 03:26:01,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 79 [2024-11-17 03:26:01,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 159 flow. Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:01,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:01,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 79 [2024-11-17 03:26:01,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:01,906 INFO L124 PetriNetUnfolderBase]: 65/271 cut-off events. [2024-11-17 03:26:01,907 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:26:01,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 271 events. 65/271 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1347 event pairs, 63 based on Foata normal form. 2/211 useless extension candidates. Maximal degree in co-relation 376. Up to 155 conditions per place. [2024-11-17 03:26:01,912 INFO L140 encePairwiseOnDemand]: 77/79 looper letters, 28 selfloop transitions, 0 changer transitions 0/76 dead transitions. [2024-11-17 03:26:01,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 211 flow [2024-11-17 03:26:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-17 03:26:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-17 03:26:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 128 transitions. [2024-11-17 03:26:01,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.810126582278481 [2024-11-17 03:26:01,927 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 159 flow. Second operand 2 states and 128 transitions. [2024-11-17 03:26:01,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 211 flow [2024-11-17 03:26:01,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:26:01,932 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 154 flow [2024-11-17 03:26:01,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-11-17 03:26:01,939 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2024-11-17 03:26:01,940 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 154 flow [2024-11-17 03:26:01,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:01,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:01,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:01,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:26:01,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:01,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash -172299271, now seen corresponding path program 1 times [2024-11-17 03:26:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:01,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639528614] [2024-11-17 03:26:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:01,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639528614] [2024-11-17 03:26:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639528614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938979426] [2024-11-17 03:26:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:02,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:26:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:26:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:26:02,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-17 03:26:02,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:02,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-17 03:26:02,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:02,205 INFO L124 PetriNetUnfolderBase]: 65/273 cut-off events. [2024-11-17 03:26:02,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:26:02,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434 conditions, 273 events. 65/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1333 event pairs, 63 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 431. Up to 156 conditions per place. [2024-11-17 03:26:02,207 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-17 03:26:02,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 216 flow [2024-11-17 03:26:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-11-17 03:26:02,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383966244725738 [2024-11-17 03:26:02,209 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 154 flow. Second operand 3 states and 175 transitions. [2024-11-17 03:26:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 216 flow [2024-11-17 03:26:02,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:26:02,211 INFO L231 Difference]: Finished difference. Result has 81 places, 77 transitions, 166 flow [2024-11-17 03:26:02,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=81, PETRI_TRANSITIONS=77} [2024-11-17 03:26:02,212 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-17 03:26:02,212 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 77 transitions, 166 flow [2024-11-17 03:26:02,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:02,213 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:02,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:26:02,213 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:02,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:02,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1071556432, now seen corresponding path program 1 times [2024-11-17 03:26:02,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:02,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779907113] [2024-11-17 03:26:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:02,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779907113] [2024-11-17 03:26:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779907113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748178949] [2024-11-17 03:26:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:02,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:02,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:02,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:26:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:02,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-17 03:26:02,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:02,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748178949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:02,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-17 03:26:02,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327804541] [2024-11-17 03:26:02,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:02,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:26:02,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:02,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:26:02,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:26:02,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-17 03:26:02,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 77 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-17 03:26:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:02,499 INFO L124 PetriNetUnfolderBase]: 65/279 cut-off events. [2024-11-17 03:26:02,500 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:26:02,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 279 events. 65/279 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1333 event pairs, 63 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 448. Up to 156 conditions per place. [2024-11-17 03:26:02,501 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-17 03:26:02,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 244 flow [2024-11-17 03:26:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:26:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:26:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-17 03:26:02,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6835443037974683 [2024-11-17 03:26:02,504 INFO L175 Difference]: Start difference. First operand has 81 places, 77 transitions, 166 flow. Second operand 6 states and 324 transitions. [2024-11-17 03:26:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 244 flow [2024-11-17 03:26:02,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:26:02,506 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 200 flow [2024-11-17 03:26:02,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2024-11-17 03:26:02,507 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2024-11-17 03:26:02,507 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 200 flow [2024-11-17 03:26:02,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:02,507 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:02,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:26:02,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:02,709 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:02,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2055441323, now seen corresponding path program 2 times [2024-11-17 03:26:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:02,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587501322] [2024-11-17 03:26:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-17 03:26:02,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587501322] [2024-11-17 03:26:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587501322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:02,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:02,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442301371] [2024-11-17 03:26:02,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:02,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:26:02,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:26:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:26:02,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2024-11-17 03:26:02,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:02,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2024-11-17 03:26:02,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:02,969 INFO L124 PetriNetUnfolderBase]: 65/275 cut-off events. [2024-11-17 03:26:02,973 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-17 03:26:02,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 275 events. 65/275 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1315 event pairs, 63 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 456. Up to 157 conditions per place. [2024-11-17 03:26:02,975 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 30 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-11-17 03:26:02,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 76 transitions, 260 flow [2024-11-17 03:26:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 163 transitions. [2024-11-17 03:26:02,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6877637130801688 [2024-11-17 03:26:02,980 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 200 flow. Second operand 3 states and 163 transitions. [2024-11-17 03:26:02,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 76 transitions, 260 flow [2024-11-17 03:26:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 76 transitions, 252 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:26:02,982 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 192 flow [2024-11-17 03:26:02,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-17 03:26:02,983 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2024-11-17 03:26:02,987 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 192 flow [2024-11-17 03:26:02,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:02,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:02,987 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:02,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:26:02,988 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:02,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2055441322, now seen corresponding path program 1 times [2024-11-17 03:26:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860754919] [2024-11-17 03:26:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:03,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860754919] [2024-11-17 03:26:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860754919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021493601] [2024-11-17 03:26:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:03,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:03,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:03,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:26:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:03,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:26:03,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:03,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:26:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021493601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:03,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-17 03:26:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638151811] [2024-11-17 03:26:03,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:03,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:26:03,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:26:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:26:03,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-17 03:26:03,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 49.23076923076923) internal successors, (640), 13 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:03,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:03,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-17 03:26:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:03,458 INFO L124 PetriNetUnfolderBase]: 65/287 cut-off events. [2024-11-17 03:26:03,458 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-17 03:26:03,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 287 events. 65/287 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1317 event pairs, 63 based on Foata normal form. 6/235 useless extension candidates. Maximal degree in co-relation 485. Up to 156 conditions per place. [2024-11-17 03:26:03,460 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 28 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-11-17 03:26:03,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 82 transitions, 306 flow [2024-11-17 03:26:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:26:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:26:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 621 transitions. [2024-11-17 03:26:03,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6550632911392406 [2024-11-17 03:26:03,462 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 192 flow. Second operand 12 states and 621 transitions. [2024-11-17 03:26:03,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 82 transitions, 306 flow [2024-11-17 03:26:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:26:03,465 INFO L231 Difference]: Finished difference. Result has 100 places, 82 transitions, 268 flow [2024-11-17 03:26:03,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=268, PETRI_PLACES=100, PETRI_TRANSITIONS=82} [2024-11-17 03:26:03,466 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2024-11-17 03:26:03,466 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 82 transitions, 268 flow [2024-11-17 03:26:03,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.23076923076923) internal successors, (640), 13 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:03,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:03,467 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:03,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:26:03,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:03,671 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:03,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 473517152, now seen corresponding path program 2 times [2024-11-17 03:26:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519070951] [2024-11-17 03:26:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:03,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:03,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519070951] [2024-11-17 03:26:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519070951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:03,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717178906] [2024-11-17 03:26:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:03,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:26:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:26:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:26:03,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2024-11-17 03:26:03,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 82 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:03,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:03,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2024-11-17 03:26:03,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:04,069 INFO L124 PetriNetUnfolderBase]: 65/283 cut-off events. [2024-11-17 03:26:04,069 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-17 03:26:04,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 283 events. 65/283 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1294 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 500. Up to 163 conditions per place. [2024-11-17 03:26:04,075 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-11-17 03:26:04,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 78 transitions, 336 flow [2024-11-17 03:26:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-17 03:26:04,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7046413502109705 [2024-11-17 03:26:04,076 INFO L175 Difference]: Start difference. First operand has 100 places, 82 transitions, 268 flow. Second operand 3 states and 167 transitions. [2024-11-17 03:26:04,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 78 transitions, 336 flow [2024-11-17 03:26:04,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 78 transitions, 300 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-17 03:26:04,084 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 232 flow [2024-11-17 03:26:04,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2024-11-17 03:26:04,085 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-17 03:26:04,085 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 232 flow [2024-11-17 03:26:04,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:04,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:04,085 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:04,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:26:04,086 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:04,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -216535980, now seen corresponding path program 1 times [2024-11-17 03:26:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:04,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012335851] [2024-11-17 03:26:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:04,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:04,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012335851] [2024-11-17 03:26:04,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012335851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:04,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:04,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:26:04,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452901220] [2024-11-17 03:26:04,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:04,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:26:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:26:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:26:04,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-17 03:26:04,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-17 03:26:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:04,506 INFO L124 PetriNetUnfolderBase]: 74/305 cut-off events. [2024-11-17 03:26:04,506 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-17 03:26:04,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 305 events. 74/305 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1412 event pairs, 72 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 529. Up to 185 conditions per place. [2024-11-17 03:26:04,508 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 40 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2024-11-17 03:26:04,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 74 transitions, 306 flow [2024-11-17 03:26:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-17 03:26:04,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.679324894514768 [2024-11-17 03:26:04,510 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 232 flow. Second operand 3 states and 161 transitions. [2024-11-17 03:26:04,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 74 transitions, 306 flow [2024-11-17 03:26:04,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 74 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:26:04,513 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 218 flow [2024-11-17 03:26:04,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2024-11-17 03:26:04,514 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 11 predicate places. [2024-11-17 03:26:04,515 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 218 flow [2024-11-17 03:26:04,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:04,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:04,515 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:04,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:26:04,516 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:04,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash -216535979, now seen corresponding path program 1 times [2024-11-17 03:26:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321580231] [2024-11-17 03:26:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321580231] [2024-11-17 03:26:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321580231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:04,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:04,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:26:04,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858983112] [2024-11-17 03:26:04,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:04,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:26:04,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:26:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:26:04,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 79 [2024-11-17 03:26:04,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:04,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:04,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 79 [2024-11-17 03:26:04,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:05,017 INFO L124 PetriNetUnfolderBase]: 65/292 cut-off events. [2024-11-17 03:26:05,017 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-17 03:26:05,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 292 events. 65/292 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1235 event pairs, 63 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 502. Up to 167 conditions per place. [2024-11-17 03:26:05,019 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 41 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2024-11-17 03:26:05,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 328 flow [2024-11-17 03:26:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:26:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:26:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-17 03:26:05,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5848101265822785 [2024-11-17 03:26:05,024 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 218 flow. Second operand 5 states and 231 transitions. [2024-11-17 03:26:05,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 328 flow [2024-11-17 03:26:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 81 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:26:05,027 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 267 flow [2024-11-17 03:26:05,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2024-11-17 03:26:05,027 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-17 03:26:05,028 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 267 flow [2024-11-17 03:26:05,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:05,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:05,028 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:05,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:26:05,028 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:05,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1831368520, now seen corresponding path program 1 times [2024-11-17 03:26:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584673429] [2024-11-17 03:26:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584673429] [2024-11-17 03:26:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584673429] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:05,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:26:05,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416901160] [2024-11-17 03:26:05,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:05,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:26:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:26:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:26:05,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 79 [2024-11-17 03:26:05,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 38.57142857142857) internal successors, (270), 7 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:05,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:05,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 79 [2024-11-17 03:26:05,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:06,004 INFO L124 PetriNetUnfolderBase]: 65/288 cut-off events. [2024-11-17 03:26:06,005 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-11-17 03:26:06,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 288 events. 65/288 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1201 event pairs, 63 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 519. Up to 160 conditions per place. [2024-11-17 03:26:06,006 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 34 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-11-17 03:26:06,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 353 flow [2024-11-17 03:26:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:26:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:26:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2024-11-17 03:26:06,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5262206148282098 [2024-11-17 03:26:06,008 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 267 flow. Second operand 7 states and 291 transitions. [2024-11-17 03:26:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 353 flow [2024-11-17 03:26:06,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:26:06,010 INFO L231 Difference]: Finished difference. Result has 96 places, 77 transitions, 281 flow [2024-11-17 03:26:06,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=281, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2024-11-17 03:26:06,011 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 18 predicate places. [2024-11-17 03:26:06,011 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 281 flow [2024-11-17 03:26:06,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.57142857142857) internal successors, (270), 7 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:06,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:06,013 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:06,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:26:06,013 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:06,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1831368521, now seen corresponding path program 1 times [2024-11-17 03:26:06,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:06,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263437249] [2024-11-17 03:26:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:06,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:06,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:06,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263437249] [2024-11-17 03:26:06,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263437249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:06,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-17 03:26:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693773837] [2024-11-17 03:26:06,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:06,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:26:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:26:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:26:06,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 79 [2024-11-17 03:26:06,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 281 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:06,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:06,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 79 [2024-11-17 03:26:06,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:06,651 INFO L124 PetriNetUnfolderBase]: 65/284 cut-off events. [2024-11-17 03:26:06,651 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-17 03:26:06,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 284 events. 65/284 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1175 event pairs, 63 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 527. Up to 160 conditions per place. [2024-11-17 03:26:06,653 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 35 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-11-17 03:26:06,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 75 transitions, 369 flow [2024-11-17 03:26:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:26:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:26:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2024-11-17 03:26:06,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.566003616636528 [2024-11-17 03:26:06,656 INFO L175 Difference]: Start difference. First operand has 96 places, 77 transitions, 281 flow. Second operand 7 states and 313 transitions. [2024-11-17 03:26:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 75 transitions, 369 flow [2024-11-17 03:26:06,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 75 transitions, 347 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:26:06,657 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 277 flow [2024-11-17 03:26:06,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=277, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2024-11-17 03:26:06,658 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-17 03:26:06,658 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 277 flow [2024-11-17 03:26:06,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:06,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:06,659 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:06,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:26:06,659 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:06,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 991461045, now seen corresponding path program 1 times [2024-11-17 03:26:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:06,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379812598] [2024-11-17 03:26:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:06,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:06,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379812598] [2024-11-17 03:26:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379812598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:06,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:26:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626986705] [2024-11-17 03:26:06,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:06,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:26:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:26:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:26:06,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2024-11-17 03:26:06,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:06,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:06,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2024-11-17 03:26:06,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:07,035 INFO L124 PetriNetUnfolderBase]: 65/282 cut-off events. [2024-11-17 03:26:07,036 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-17 03:26:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 282 events. 65/282 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1166 event pairs, 63 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 519. Up to 162 conditions per place. [2024-11-17 03:26:07,037 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 32 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-11-17 03:26:07,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 74 transitions, 361 flow [2024-11-17 03:26:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:26:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:26:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 249 transitions. [2024-11-17 03:26:07,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6303797468354431 [2024-11-17 03:26:07,039 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 277 flow. Second operand 5 states and 249 transitions. [2024-11-17 03:26:07,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 74 transitions, 361 flow [2024-11-17 03:26:07,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 74 transitions, 339 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:26:07,040 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 275 flow [2024-11-17 03:26:07,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-17 03:26:07,041 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-11-17 03:26:07,041 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 275 flow [2024-11-17 03:26:07,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:07,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:07,042 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:07,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:26:07,042 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:07,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 991461044, now seen corresponding path program 1 times [2024-11-17 03:26:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:07,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286824088] [2024-11-17 03:26:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:07,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:07,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286824088] [2024-11-17 03:26:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286824088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:26:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198610669] [2024-11-17 03:26:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:07,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:26:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:26:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:26:07,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 79 [2024-11-17 03:26:07,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:07,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:07,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 79 [2024-11-17 03:26:07,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:07,292 INFO L124 PetriNetUnfolderBase]: 65/280 cut-off events. [2024-11-17 03:26:07,292 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-17 03:26:07,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 280 events. 65/280 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1147 event pairs, 63 based on Foata normal form. 2/238 useless extension candidates. Maximal degree in co-relation 521. Up to 162 conditions per place. [2024-11-17 03:26:07,294 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 34 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-11-17 03:26:07,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 73 transitions, 363 flow [2024-11-17 03:26:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:26:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:26:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 241 transitions. [2024-11-17 03:26:07,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.610126582278481 [2024-11-17 03:26:07,295 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 275 flow. Second operand 5 states and 241 transitions. [2024-11-17 03:26:07,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 73 transitions, 363 flow [2024-11-17 03:26:07,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 73 transitions, 341 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:26:07,297 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 273 flow [2024-11-17 03:26:07,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2024-11-17 03:26:07,298 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 12 predicate places. [2024-11-17 03:26:07,298 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 273 flow [2024-11-17 03:26:07,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:07,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:07,298 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:07,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:26:07,299 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:07,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1241713974, now seen corresponding path program 1 times [2024-11-17 03:26:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:07,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879401974] [2024-11-17 03:26:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:07,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879401974] [2024-11-17 03:26:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879401974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779173554] [2024-11-17 03:26:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:07,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:07,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:07,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:26:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:07,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-17 03:26:07,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:26:08,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:26:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:26:08,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:26:08,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:26:08,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-17 03:26:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:08,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:08,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:26:08,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-17 03:26:08,457 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:26:08,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-17 03:26:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779173554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:08,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:08,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-17 03:26:08,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513137608] [2024-11-17 03:26:08,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:08,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:26:08,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:08,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:26:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:26:11,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 79 [2024-11-17 03:26:11,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 273 flow. Second operand has 20 states, 20 states have (on average 38.95) internal successors, (779), 20 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:11,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:11,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 79 [2024-11-17 03:26:11,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:11,388 INFO L124 PetriNetUnfolderBase]: 75/323 cut-off events. [2024-11-17 03:26:11,388 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2024-11-17 03:26:11,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 323 events. 75/323 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1356 event pairs, 72 based on Foata normal form. 5/280 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2024-11-17 03:26:11,390 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 45 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-11-17 03:26:11,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 433 flow [2024-11-17 03:26:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:26:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:26:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 348 transitions. [2024-11-17 03:26:11,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5506329113924051 [2024-11-17 03:26:11,391 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 273 flow. Second operand 8 states and 348 transitions. [2024-11-17 03:26:11,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 433 flow [2024-11-17 03:26:11,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 395 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:26:11,393 INFO L231 Difference]: Finished difference. Result has 93 places, 74 transitions, 286 flow [2024-11-17 03:26:11,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=93, PETRI_TRANSITIONS=74} [2024-11-17 03:26:11,394 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 15 predicate places. [2024-11-17 03:26:11,394 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 74 transitions, 286 flow [2024-11-17 03:26:11,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 38.95) internal successors, (779), 20 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:11,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:11,395 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:11,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:26:11,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:11,599 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:11,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1487234405, now seen corresponding path program 1 times [2024-11-17 03:26:11,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:11,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729890109] [2024-11-17 03:26:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729890109] [2024-11-17 03:26:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729890109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612931722] [2024-11-17 03:26:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:11,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:26:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:11,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-17 03:26:11,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:11,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:12,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612931722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:12,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:12,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-17 03:26:12,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013708805] [2024-11-17 03:26:12,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:12,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:26:12,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:12,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:26:12,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:26:12,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-17 03:26:12,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 74 transitions, 286 flow. Second operand has 9 states, 9 states have (on average 53.111111111111114) internal successors, (478), 9 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:12,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:12,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-17 03:26:12,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:12,247 INFO L124 PetriNetUnfolderBase]: 65/324 cut-off events. [2024-11-17 03:26:12,247 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-17 03:26:12,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 643 conditions, 324 events. 65/324 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1099 event pairs, 63 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 624. Up to 159 conditions per place. [2024-11-17 03:26:12,249 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 67 selfloop transitions, 8 changer transitions 0/102 dead transitions. [2024-11-17 03:26:12,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 548 flow [2024-11-17 03:26:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:26:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:26:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 453 transitions. [2024-11-17 03:26:12,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7167721518987342 [2024-11-17 03:26:12,254 INFO L175 Difference]: Start difference. First operand has 93 places, 74 transitions, 286 flow. Second operand 8 states and 453 transitions. [2024-11-17 03:26:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 548 flow [2024-11-17 03:26:12,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 534 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:26:12,256 INFO L231 Difference]: Finished difference. Result has 101 places, 77 transitions, 334 flow [2024-11-17 03:26:12,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2024-11-17 03:26:12,257 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2024-11-17 03:26:12,257 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 334 flow [2024-11-17 03:26:12,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.111111111111114) internal successors, (478), 9 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:12,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:12,257 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:12,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:26:12,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:12,458 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:12,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1852936869, now seen corresponding path program 2 times [2024-11-17 03:26:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678133506] [2024-11-17 03:26:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678133506] [2024-11-17 03:26:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678133506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:12,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835174437] [2024-11-17 03:26:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:26:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:12,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:26:13,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:26:13,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:26:13,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:26:13,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:13,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:26:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835174437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:26:13,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:26:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-17 03:26:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750699442] [2024-11-17 03:26:13,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:26:13,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:26:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:26:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:26:13,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2024-11-17 03:26:13,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:13,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:13,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2024-11-17 03:26:13,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:13,561 INFO L124 PetriNetUnfolderBase]: 65/368 cut-off events. [2024-11-17 03:26:13,562 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2024-11-17 03:26:13,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 368 events. 65/368 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1097 event pairs, 63 based on Foata normal form. 4/328 useless extension candidates. Maximal degree in co-relation 758. Up to 159 conditions per place. [2024-11-17 03:26:13,564 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 91 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2024-11-17 03:26:13,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 130 transitions, 784 flow [2024-11-17 03:26:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:26:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:26:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 673 transitions. [2024-11-17 03:26:13,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.709915611814346 [2024-11-17 03:26:13,566 INFO L175 Difference]: Start difference. First operand has 101 places, 77 transitions, 334 flow. Second operand 12 states and 673 transitions. [2024-11-17 03:26:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 130 transitions, 784 flow [2024-11-17 03:26:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 130 transitions, 780 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:26:13,569 INFO L231 Difference]: Finished difference. Result has 115 places, 82 transitions, 431 flow [2024-11-17 03:26:13,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=431, PETRI_PLACES=115, PETRI_TRANSITIONS=82} [2024-11-17 03:26:13,570 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2024-11-17 03:26:13,570 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 82 transitions, 431 flow [2024-11-17 03:26:13,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.23076923076923) internal successors, (705), 13 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:13,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:13,571 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:13,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:26:13,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:26:13,772 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:13,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -325132315, now seen corresponding path program 3 times [2024-11-17 03:26:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:13,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028914497] [2024-11-17 03:26:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:13,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 372 proven. 143 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:26:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028914497] [2024-11-17 03:26:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028914497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:26:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034371553] [2024-11-17 03:26:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:26:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:26:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:26:14,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:26:14,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:26:14,891 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:26:14,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:26:14,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:26:14,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:26:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2024-11-17 03:26:15,353 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:26:15,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034371553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:15,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:26:15,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2024-11-17 03:26:15,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707002298] [2024-11-17 03:26:15,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:15,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:26:15,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:26:15,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:26:15,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-17 03:26:15,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 82 transitions, 431 flow. Second operand has 7 states, 7 states have (on average 49.714285714285715) internal successors, (348), 7 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:15,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:15,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-17 03:26:15,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:15,663 INFO L124 PetriNetUnfolderBase]: 71/408 cut-off events. [2024-11-17 03:26:15,663 INFO L125 PetriNetUnfolderBase]: For 488/488 co-relation queries the response was YES. [2024-11-17 03:26:15,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 408 events. 71/408 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1465 event pairs, 18 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 835. Up to 126 conditions per place. [2024-11-17 03:26:15,665 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 46 selfloop transitions, 23 changer transitions 3/98 dead transitions. [2024-11-17 03:26:15,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 98 transitions, 607 flow [2024-11-17 03:26:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:26:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:26:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 424 transitions. [2024-11-17 03:26:15,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708860759493671 [2024-11-17 03:26:15,666 INFO L175 Difference]: Start difference. First operand has 115 places, 82 transitions, 431 flow. Second operand 8 states and 424 transitions. [2024-11-17 03:26:15,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 98 transitions, 607 flow [2024-11-17 03:26:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 597 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:26:15,670 INFO L231 Difference]: Finished difference. Result has 118 places, 84 transitions, 478 flow [2024-11-17 03:26:15,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=478, PETRI_PLACES=118, PETRI_TRANSITIONS=84} [2024-11-17 03:26:15,670 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 40 predicate places. [2024-11-17 03:26:15,670 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 84 transitions, 478 flow [2024-11-17 03:26:15,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 49.714285714285715) internal successors, (348), 7 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:15,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:15,671 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:15,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:26:15,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 03:26:15,872 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:15,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash -324216718, now seen corresponding path program 1 times [2024-11-17 03:26:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:15,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674918783] [2024-11-17 03:26:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:15,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-11-17 03:26:16,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674918783] [2024-11-17 03:26:16,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674918783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:16,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:16,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961930604] [2024-11-17 03:26:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:16,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:26:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:26:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:26:16,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2024-11-17 03:26:16,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 84 transitions, 478 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:16,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:16,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2024-11-17 03:26:16,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:16,270 INFO L124 PetriNetUnfolderBase]: 72/383 cut-off events. [2024-11-17 03:26:16,270 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2024-11-17 03:26:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 383 events. 72/383 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1167 event pairs, 51 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 870. Up to 214 conditions per place. [2024-11-17 03:26:16,272 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 61 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2024-11-17 03:26:16,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 89 transitions, 618 flow [2024-11-17 03:26:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-11-17 03:26:16,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7426160337552743 [2024-11-17 03:26:16,274 INFO L175 Difference]: Start difference. First operand has 118 places, 84 transitions, 478 flow. Second operand 3 states and 176 transitions. [2024-11-17 03:26:16,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 89 transitions, 618 flow [2024-11-17 03:26:16,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 89 transitions, 588 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-17 03:26:16,277 INFO L231 Difference]: Finished difference. Result has 114 places, 82 transitions, 451 flow [2024-11-17 03:26:16,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=451, PETRI_PLACES=114, PETRI_TRANSITIONS=82} [2024-11-17 03:26:16,277 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 36 predicate places. [2024-11-17 03:26:16,277 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 82 transitions, 451 flow [2024-11-17 03:26:16,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:16,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:16,278 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:16,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:26:16,278 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:16,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -324216717, now seen corresponding path program 1 times [2024-11-17 03:26:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:16,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873746054] [2024-11-17 03:26:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:16,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:26:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-11-17 03:26:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:26:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873746054] [2024-11-17 03:26:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873746054] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:26:16,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:26:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:26:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343796307] [2024-11-17 03:26:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:26:16,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:26:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:26:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:26:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:26:16,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2024-11-17 03:26:16,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 82 transitions, 451 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:26:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2024-11-17 03:26:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:26:16,809 INFO L124 PetriNetUnfolderBase]: 65/361 cut-off events. [2024-11-17 03:26:16,809 INFO L125 PetriNetUnfolderBase]: For 489/489 co-relation queries the response was YES. [2024-11-17 03:26:16,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 361 events. 65/361 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1022 event pairs, 50 based on Foata normal form. 16/344 useless extension candidates. Maximal degree in co-relation 815. Up to 214 conditions per place. [2024-11-17 03:26:16,811 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 60 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2024-11-17 03:26:16,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 87 transitions, 588 flow [2024-11-17 03:26:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:26:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:26:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2024-11-17 03:26:16,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7510548523206751 [2024-11-17 03:26:16,812 INFO L175 Difference]: Start difference. First operand has 114 places, 82 transitions, 451 flow. Second operand 3 states and 178 transitions. [2024-11-17 03:26:16,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 87 transitions, 588 flow [2024-11-17 03:26:16,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 87 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:26:16,816 INFO L231 Difference]: Finished difference. Result has 112 places, 80 transitions, 447 flow [2024-11-17 03:26:16,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=447, PETRI_PLACES=112, PETRI_TRANSITIONS=80} [2024-11-17 03:26:16,816 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 34 predicate places. [2024-11-17 03:26:16,816 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 80 transitions, 447 flow [2024-11-17 03:26:16,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:26:16,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:26:16,817 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:26:16,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:26:16,818 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-17 03:26:16,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:26:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1489166721, now seen corresponding path program 1 times [2024-11-17 03:26:16,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:26:16,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935793607] [2024-11-17 03:26:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:26:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:26:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 515 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-17 03:27:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:27:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935793607] [2024-11-17 03:27:21,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935793607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:27:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560563279] [2024-11-17 03:27:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:27:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:27:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:27:21,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:27:21,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:27:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:27:23,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 2238 conjuncts, 440 conjuncts are in the unsatisfiable core [2024-11-17 03:27:23,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:27:24,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:27:24,542 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 [2024-11-17 03:27:24,554 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-17 03:27:24,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-17 03:27:24,560 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 23 treesize of output 11 [2024-11-17 03:27:25,373 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2024-11-17 03:27:25,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2024-11-17 03:27:25,399 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2024-11-17 03:27:25,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2024-11-17 03:27:25,796 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 [2024-11-17 03:27:25,827 INFO L349 Elim1Store]: treesize reduction 64, result has 35.4 percent of original size [2024-11-17 03:27:25,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 44 [2024-11-17 03:27:25,841 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2024-11-17 03:27:25,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2024-11-17 03:27:25,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 40