./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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/pthread/queue_ok_longest.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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:19:13,264 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:19:13,319 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:19:13,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:19:13,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:19:13,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:19:13,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:19:13,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:19:13,345 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:19:13,345 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:19:13,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:19:13,346 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:19:13,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:19:13,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:19:13,346 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:19:13,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:19:13,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:19:13,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:19:13,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:19:13,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:19:13,353 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:19:13,353 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:19:13,353 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:19:13,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:19:13,354 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:19:13,354 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:19:13,354 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:19:13,354 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:19:13,354 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:19:13,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:19:13,355 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:19:13,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:19:13,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:19:13,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:19:13,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:19:13,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:19:13,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:19:13,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:19:13,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:19:13,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:19:13,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:19:13,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:19:13,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2024-11-19 09:19:13,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:19:13,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:19:13,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:19:13,601 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:19:13,601 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:19:13,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue_ok_longest.i [2024-11-19 09:19:14,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:19:15,079 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:19:15,080 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_ok_longest.i [2024-11-19 09:19:15,097 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e920f06d1/eef19fae71c74799af1a108736159d84/FLAGb52c76ee7 [2024-11-19 09:19:15,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e920f06d1/eef19fae71c74799af1a108736159d84 [2024-11-19 09:19:15,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:19:15,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:19:15,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:19:15,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:19:15,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:19:15,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16294758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15, skipping insertion in model container [2024-11-19 09:19:15,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:19:15,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:19:15,618 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:19:15,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:19:15,762 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:19:15,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15 WrapperNode [2024-11-19 09:19:15,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:19:15,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:19:15,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:19:15,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:19:15,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,896 INFO L138 Inliner]: procedures = 274, calls = 1654, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1801 [2024-11-19 09:19:15,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:19:15,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:19:15,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:19:15,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:19:15,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,966 INFO L175 MemorySlicer]: Split 1635 memory accesses to 4 slices as follows [2, 5, 802, 826]. 51 percent of accesses are in the largest equivalence class. The 1610 initializations are split as follows [2, 5, 800, 803]. The 11 writes are split as follows [0, 0, 1, 10]. [2024-11-19 09:19:15,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:15,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:19:16,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:19:16,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:19:16,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:19:16,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (1/1) ... [2024-11-19 09:19:16,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:19:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:19:16,079 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) [2024-11-19 09:19:16,082 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 [2024-11-19 09:19:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-19 09:19:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-19 09:19:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-19 09:19:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-19 09:19:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:19:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:19:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:19:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:19:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 09:19:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:19:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:19:16,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:19:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:19:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 09:19:16,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:19:16,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:19:16,125 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:19:16,252 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:19:16,254 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:19:17,962 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:19:17,962 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:19:47,259 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:19:47,261 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 09:19:47,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:19:47 BoogieIcfgContainer [2024-11-19 09:19:47,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:19:47,265 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:19:47,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:19:47,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:19:47,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:19:15" (1/3) ... [2024-11-19 09:19:47,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76979cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:19:47, skipping insertion in model container [2024-11-19 09:19:47,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:19:15" (2/3) ... [2024-11-19 09:19:47,271 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76979cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:19:47, skipping insertion in model container [2024-11-19 09:19:47,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:19:47" (3/3) ... [2024-11-19 09:19:47,272 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2024-11-19 09:19:47,288 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:19:47,289 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2024-11-19 09:19:47,289 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:19:47,419 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:19:47,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 272 flow [2024-11-19 09:19:47,564 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2024-11-19 09:19:47,564 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:19:47,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 405 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2024-11-19 09:19:47,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 272 flow [2024-11-19 09:19:47,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2024-11-19 09:19:47,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:19:47,599 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;@57799592, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:19:47,600 INFO L334 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2024-11-19 09:19:47,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:19:47,654 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-11-19 09:19:47,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:19:47,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:47,655 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-19 09:19:47,655 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:47,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:47,661 INFO L85 PathProgramCache]: Analyzing trace with hash 120649, now seen corresponding path program 1 times [2024-11-19 09:19:47,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:47,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117525702] [2024-11-19 09:19:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:48,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117525702] [2024-11-19 09:19:48,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117525702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:48,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:48,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104778265] [2024-11-19 09:19:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:48,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:48,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-19 09:19:48,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:48,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:48,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-19 09:19:48,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:49,069 INFO L124 PetriNetUnfolderBase]: 1089/2984 cut-off events. [2024-11-19 09:19:49,069 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-19 09:19:49,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2984 events. 1089/2984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23575 event pairs, 839 based on Foata normal form. 68/2109 useless extension candidates. Maximal degree in co-relation 4570. Up to 1689 conditions per place. [2024-11-19 09:19:49,092 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-11-19 09:19:49,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 334 flow [2024-11-19 09:19:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-11-19 09:19:49,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6873385012919897 [2024-11-19 09:19:49,104 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 264 flow. Second operand 3 states and 266 transitions. [2024-11-19 09:19:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 334 flow [2024-11-19 09:19:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:19:49,110 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2024-11-19 09:19:49,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2024-11-19 09:19:49,115 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -10 predicate places. [2024-11-19 09:19:49,115 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2024-11-19 09:19:49,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:49,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:49,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-11-19 09:19:49,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:19:49,116 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:49,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 120650, now seen corresponding path program 1 times [2024-11-19 09:19:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155775648] [2024-11-19 09:19:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155775648] [2024-11-19 09:19:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155775648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:49,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:49,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523659470] [2024-11-19 09:19:49,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:49,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:50,023 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-11-19 09:19:50,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:50,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:50,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-11-19 09:19:50,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:50,327 INFO L124 PetriNetUnfolderBase]: 1089/2981 cut-off events. [2024-11-19 09:19:50,327 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:19:50,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2981 events. 1089/2981 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23571 event pairs, 839 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4679. Up to 1689 conditions per place. [2024-11-19 09:19:50,345 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-19 09:19:50,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 324 flow [2024-11-19 09:19:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-19 09:19:50,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795865633074936 [2024-11-19 09:19:50,350 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 263 transitions. [2024-11-19 09:19:50,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 324 flow [2024-11-19 09:19:50,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:50,354 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 230 flow [2024-11-19 09:19:50,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-11-19 09:19:50,356 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2024-11-19 09:19:50,356 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 230 flow [2024-11-19 09:19:50,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:50,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:50,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:19:50,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:19:50,358 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:50,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -696983822, now seen corresponding path program 1 times [2024-11-19 09:19:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783121615] [2024-11-19 09:19:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:50,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:50,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783121615] [2024-11-19 09:19:50,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783121615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:50,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:50,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:50,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394985625] [2024-11-19 09:19:50,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:50,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:50,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:50,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:50,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:50,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 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) [2024-11-19 09:19:50,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:50,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:50,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:51,254 INFO L124 PetriNetUnfolderBase]: 1089/2979 cut-off events. [2024-11-19 09:19:51,255 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 09:19:51,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2979 events. 1089/2979 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23545 event pairs, 839 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 4677. Up to 1688 conditions per place. [2024-11-19 09:19:51,271 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:19:51,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 320 flow [2024-11-19 09:19:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-19 09:19:51,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-19 09:19:51,273 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 230 flow. Second operand 4 states and 337 transitions. [2024-11-19 09:19:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 320 flow [2024-11-19 09:19:51,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:51,275 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 228 flow [2024-11-19 09:19:51,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-11-19 09:19:51,276 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -14 predicate places. [2024-11-19 09:19:51,276 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 228 flow [2024-11-19 09:19:51,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 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) [2024-11-19 09:19:51,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:51,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:19:51,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:19:51,277 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:51,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:51,278 INFO L85 PathProgramCache]: Analyzing trace with hash -696983821, now seen corresponding path program 1 times [2024-11-19 09:19:51,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:51,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072877839] [2024-11-19 09:19:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072877839] [2024-11-19 09:19:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072877839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935314911] [2024-11-19 09:19:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:52,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:52,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:52,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 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) [2024-11-19 09:19:52,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:52,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:52,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:52,837 INFO L124 PetriNetUnfolderBase]: 1089/2977 cut-off events. [2024-11-19 09:19:52,837 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:19:52,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 2977 events. 1089/2977 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23568 event pairs, 839 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 4672. Up to 1688 conditions per place. [2024-11-19 09:19:52,854 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-11-19 09:19:52,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 318 flow [2024-11-19 09:19:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-11-19 09:19:52,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-11-19 09:19:52,857 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 228 flow. Second operand 4 states and 337 transitions. [2024-11-19 09:19:52,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 318 flow [2024-11-19 09:19:52,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 312 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:52,860 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 224 flow [2024-11-19 09:19:52,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-19 09:19:52,861 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-11-19 09:19:52,862 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 224 flow [2024-11-19 09:19:52,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 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) [2024-11-19 09:19:52,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:52,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:52,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:19:52,863 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:52,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash 875313852, now seen corresponding path program 1 times [2024-11-19 09:19:52,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:52,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227764602] [2024-11-19 09:19:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:52,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:53,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227764602] [2024-11-19 09:19:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227764602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:53,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:53,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:53,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614533577] [2024-11-19 09:19:53,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:53,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:19:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:19:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:19:53,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-11-19 09:19:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-11-19 09:19:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:53,700 INFO L124 PetriNetUnfolderBase]: 1046/2622 cut-off events. [2024-11-19 09:19:53,700 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:19:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 2622 events. 1046/2622 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19408 event pairs, 426 based on Foata normal form. 120/2116 useless extension candidates. Maximal degree in co-relation 4272. Up to 882 conditions per place. [2024-11-19 09:19:53,717 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-19 09:19:53,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 395 flow [2024-11-19 09:19:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:19:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:19:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-11-19 09:19:53,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-11-19 09:19:53,718 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 4 states and 342 transitions. [2024-11-19 09:19:53,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 395 flow [2024-11-19 09:19:53,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:53,720 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 208 flow [2024-11-19 09:19:53,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-11-19 09:19:53,721 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:53,723 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 208 flow [2024-11-19 09:19:53,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:53,725 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:53,725 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:53,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:19:53,725 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:53,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 875313853, now seen corresponding path program 1 times [2024-11-19 09:19:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:53,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381830052] [2024-11-19 09:19:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381830052] [2024-11-19 09:19:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381830052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:54,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:54,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:19:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273383411] [2024-11-19 09:19:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:54,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:19:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:19:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:19:55,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-11-19 09:19:55,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:55,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:55,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-11-19 09:19:55,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:55,636 INFO L124 PetriNetUnfolderBase]: 1046/2354 cut-off events. [2024-11-19 09:19:55,636 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-11-19 09:19:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 2354 events. 1046/2354 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15857 event pairs, 426 based on Foata normal form. 120/2000 useless extension candidates. Maximal degree in co-relation 1954. Up to 881 conditions per place. [2024-11-19 09:19:55,648 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2024-11-19 09:19:55,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 383 flow [2024-11-19 09:19:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:19:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:19:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2024-11-19 09:19:55,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-11-19 09:19:55,649 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 208 flow. Second operand 5 states and 408 transitions. [2024-11-19 09:19:55,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 383 flow [2024-11-19 09:19:55,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:19:55,652 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 196 flow [2024-11-19 09:19:55,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2024-11-19 09:19:55,653 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -30 predicate places. [2024-11-19 09:19:55,653 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 196 flow [2024-11-19 09:19:55,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:55,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:55,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:55,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:19:55,654 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:55,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1364929464, now seen corresponding path program 1 times [2024-11-19 09:19:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:55,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065288401] [2024-11-19 09:19:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:57,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:57,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065288401] [2024-11-19 09:19:57,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065288401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:57,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:57,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:19:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444592078] [2024-11-19 09:19:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:57,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:19:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:19:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:19:57,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 129 [2024-11-19 09:19:57,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:57,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:57,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 129 [2024-11-19 09:19:57,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:58,025 INFO L124 PetriNetUnfolderBase]: 2065/4255 cut-off events. [2024-11-19 09:19:58,025 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-19 09:19:58,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7680 conditions, 4255 events. 2065/4255 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29594 event pairs, 289 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 2479. Up to 2157 conditions per place. [2024-11-19 09:19:58,045 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 132 selfloop transitions, 11 changer transitions 0/182 dead transitions. [2024-11-19 09:19:58,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 182 transitions, 669 flow [2024-11-19 09:19:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:19:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:19:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2024-11-19 09:19:58,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101882613510521 [2024-11-19 09:19:58,047 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 196 flow. Second operand 7 states and 551 transitions. [2024-11-19 09:19:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 182 transitions, 669 flow [2024-11-19 09:19:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 182 transitions, 659 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:19:58,054 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 262 flow [2024-11-19 09:19:58,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-11-19 09:19:58,055 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:58,055 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 262 flow [2024-11-19 09:19:58,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:58,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:58,056 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:58,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:19:58,056 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:58,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1294656149, now seen corresponding path program 1 times [2024-11-19 09:19:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:58,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267244775] [2024-11-19 09:19:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:58,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:58,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267244775] [2024-11-19 09:19:58,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267244775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:58,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:19:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435389783] [2024-11-19 09:19:58,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:58,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:58,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-19 09:19:58,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 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) [2024-11-19 09:19:58,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:58,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-19 09:19:58,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:58,699 INFO L124 PetriNetUnfolderBase]: 692/1652 cut-off events. [2024-11-19 09:19:58,699 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-19 09:19:58,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1652 events. 692/1652 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10251 event pairs, 446 based on Foata normal form. 43/1432 useless extension candidates. Maximal degree in co-relation 3071. Up to 693 conditions per place. [2024-11-19 09:19:58,706 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 59 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:19:58,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 391 flow [2024-11-19 09:19:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-19 09:19:58,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7260981912144703 [2024-11-19 09:19:58,708 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 262 flow. Second operand 3 states and 281 transitions. [2024-11-19 09:19:58,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 391 flow [2024-11-19 09:19:58,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:58,712 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2024-11-19 09:19:58,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-11-19 09:19:58,714 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:58,714 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2024-11-19 09:19:58,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 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) [2024-11-19 09:19:58,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:58,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:58,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:19:58,718 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:58,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:58,719 INFO L85 PathProgramCache]: Analyzing trace with hash 762028401, now seen corresponding path program 1 times [2024-11-19 09:19:58,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:58,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447642223] [2024-11-19 09:19:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447642223] [2024-11-19 09:19:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447642223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:58,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:19:58,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246380865] [2024-11-19 09:19:58,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:58,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:58,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-11-19 09:19:58,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:58,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:58,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-11-19 09:19:58,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:59,113 INFO L124 PetriNetUnfolderBase]: 572/1382 cut-off events. [2024-11-19 09:19:59,114 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-19 09:19:59,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1382 events. 572/1382 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7608 event pairs, 380 based on Foata normal form. 12/1194 useless extension candidates. Maximal degree in co-relation 1698. Up to 753 conditions per place. [2024-11-19 09:19:59,119 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 62 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-19 09:19:59,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 401 flow [2024-11-19 09:19:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-11-19 09:19:59,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7416020671834626 [2024-11-19 09:19:59,121 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 287 transitions. [2024-11-19 09:19:59,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 401 flow [2024-11-19 09:19:59,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 09:19:59,124 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 248 flow [2024-11-19 09:19:59,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-11-19 09:19:59,125 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-11-19 09:19:59,125 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 248 flow [2024-11-19 09:19:59,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:59,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:59,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:59,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:19:59,126 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:59,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1169571525, now seen corresponding path program 1 times [2024-11-19 09:19:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:59,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030212871] [2024-11-19 09:19:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:19:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:19:59,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:19:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030212871] [2024-11-19 09:19:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030212871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:19:59,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:19:59,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:19:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130895679] [2024-11-19 09:19:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:19:59,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:19:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:19:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:19:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:19:59,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-11-19 09:19:59,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:59,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:19:59,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-11-19 09:19:59,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:19:59,586 INFO L124 PetriNetUnfolderBase]: 572/1349 cut-off events. [2024-11-19 09:19:59,586 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-11-19 09:19:59,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 1349 events. 572/1349 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7266 event pairs, 515 based on Foata normal form. 31/1215 useless extension candidates. Maximal degree in co-relation 809. Up to 1007 conditions per place. [2024-11-19 09:19:59,591 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 50 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2024-11-19 09:19:59,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 346 flow [2024-11-19 09:19:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:19:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:19:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-11-19 09:19:59,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6847545219638242 [2024-11-19 09:19:59,593 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 248 flow. Second operand 3 states and 265 transitions. [2024-11-19 09:19:59,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 346 flow [2024-11-19 09:19:59,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:19:59,595 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 244 flow [2024-11-19 09:19:59,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-11-19 09:19:59,596 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-11-19 09:19:59,596 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 244 flow [2024-11-19 09:19:59,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:19:59,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:19:59,597 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:19:59,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:19:59,597 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:19:59,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:19:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1169571526, now seen corresponding path program 1 times [2024-11-19 09:19:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:19:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767075774] [2024-11-19 09:19:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:19:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:19:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:00,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:00,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767075774] [2024-11-19 09:20:00,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767075774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:20:00,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:20:00,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:20:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738198030] [2024-11-19 09:20:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:20:00,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:20:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:00,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:20:00,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:20:00,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2024-11-19 09:20:00,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:00,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:00,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2024-11-19 09:20:00,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:00,372 INFO L124 PetriNetUnfolderBase]: 587/1354 cut-off events. [2024-11-19 09:20:00,373 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-19 09:20:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1354 events. 587/1354 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7174 event pairs, 395 based on Foata normal form. 12/1197 useless extension candidates. Maximal degree in co-relation 2674. Up to 779 conditions per place. [2024-11-19 09:20:00,378 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 62 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-11-19 09:20:00,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 401 flow [2024-11-19 09:20:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:20:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:20:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2024-11-19 09:20:00,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2024-11-19 09:20:00,382 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 244 flow. Second operand 4 states and 358 transitions. [2024-11-19 09:20:00,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 401 flow [2024-11-19 09:20:00,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:20:00,385 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 253 flow [2024-11-19 09:20:00,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2024-11-19 09:20:00,385 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -21 predicate places. [2024-11-19 09:20:00,386 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 253 flow [2024-11-19 09:20:00,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:00,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:00,390 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:00,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:20:00,391 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:20:00,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1934480841, now seen corresponding path program 1 times [2024-11-19 09:20:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469684337] [2024-11-19 09:20:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:01,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469684337] [2024-11-19 09:20:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469684337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:20:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280144503] [2024-11-19 09:20:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:01,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:20:01,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:20:01,745 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) [2024-11-19 09:20:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:20:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:02,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 3449 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 09:20:02,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:20:02,387 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 [2024-11-19 09:20:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:02,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:20:02,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-11-19 09:20:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:02,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280144503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:20:02,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:20:02,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:20:02,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839871610] [2024-11-19 09:20:02,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:20:02,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:20:02,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:20:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:20:02,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:20:03,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 129 [2024-11-19 09:20:03,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 253 flow. Second operand has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:03,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:20:03,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 129 [2024-11-19 09:20:03,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:20:04,697 INFO L124 PetriNetUnfolderBase]: 1005/2167 cut-off events. [2024-11-19 09:20:04,698 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-11-19 09:20:04,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4471 conditions, 2167 events. 1005/2167 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12914 event pairs, 183 based on Foata normal form. 12/1955 useless extension candidates. Maximal degree in co-relation 4457. Up to 471 conditions per place. [2024-11-19 09:20:04,708 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 127 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-11-19 09:20:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 731 flow [2024-11-19 09:20:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:20:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:20:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 738 transitions. [2024-11-19 09:20:04,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-11-19 09:20:04,711 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 253 flow. Second operand 10 states and 738 transitions. [2024-11-19 09:20:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 731 flow [2024-11-19 09:20:04,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 177 transitions, 723 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:20:04,715 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 329 flow [2024-11-19 09:20:04,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=329, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2024-11-19 09:20:04,716 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -11 predicate places. [2024-11-19 09:20:04,716 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 329 flow [2024-11-19 09:20:04,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:20:04,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:20:04,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:20:04,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:20:04,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:20:04,919 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-11-19 09:20:04,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:20:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1806025862, now seen corresponding path program 1 times [2024-11-19 09:20:04,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:20:04,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13427360] [2024-11-19 09:20:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:20:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:07,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:20:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13427360] [2024-11-19 09:20:07,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13427360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:20:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102309247] [2024-11-19 09:20:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:20:07,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:20:07,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:20:07,629 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) [2024-11-19 09:20:07,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:20:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:20:08,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 3456 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 09:20:08,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:20:08,110 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 [2024-11-19 09:20:08,147 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 [2024-11-19 09:20:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:20:08,282 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 27 treesize of output 11 [2024-11-19 09:20:08,305 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 [2024-11-19 09:20:08,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-19 09:20:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:20:08,451 INFO L311 TraceCheckSpWp]: Computing backward predicates...