/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:26:30,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:26:30,501 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:26:30,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:26:30,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:26:30,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:26:30,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:26:30,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:26:30,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:26:30,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:26:30,546 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:26:30,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:26:30,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:26:30,548 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:26:30,548 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:26:30,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:26:30,549 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:26:30,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:26:30,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:26:30,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:26:30,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:26:30,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:26:30,553 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:26:30,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:26:30,554 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:26:30,554 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:26:30,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:26:30,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:26:30,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:26:30,555 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:26:30,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:26:30,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:26:30,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:26:30,557 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:26:30,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:26:30,557 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:26:30,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:26:30,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:26:30,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:26:30,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:26:30,881 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:26:30,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-26 15:26:31,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:26:32,341 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:26:32,342 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-26 15:26:32,369 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b5c90d0e/9bb94d199f124ea3bf5c69d3abcf2e38/FLAGfe82ac917 [2023-08-26 15:26:32,384 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b5c90d0e/9bb94d199f124ea3bf5c69d3abcf2e38 [2023-08-26 15:26:32,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:26:32,389 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:26:32,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:26:32,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:26:32,395 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:26:32,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:26:32" (1/1) ... [2023-08-26 15:26:32,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59653d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:32, skipping insertion in model container [2023-08-26 15:26:32,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:26:32" (1/1) ... [2023-08-26 15:26:32,458 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:26:33,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:26:33,042 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:26:33,057 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 15:26:33,059 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 15:26:33,066 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [729] [2023-08-26 15:26:33,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:26:33,251 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:26:33,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33 WrapperNode [2023-08-26 15:26:33,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:26:33,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:26:33,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:26:33,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:26:33,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,329 INFO L138 Inliner]: procedures = 486, calls = 44, calls flagged for inlining = 16, calls inlined = 21, statements flattened = 223 [2023-08-26 15:26:33,330 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:26:33,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:26:33,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:26:33,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:26:33,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,342 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:26:33,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:26:33,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:26:33,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:26:33,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (1/1) ... [2023-08-26 15:26:33,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:26:33,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:26:33,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 15:26:33,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 15:26:33,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread_usb [2023-08-26 15:26:33,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_usb [2023-08-26 15:26:33,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:26:33,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:26:33,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread_ath9k [2023-08-26 15:26:33,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_ath9k [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:26:33,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:26:33,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:26:33,471 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:26:33,759 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:26:33,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:26:34,092 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:26:34,102 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:26:34,102 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 15:26:34,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:26:34 BoogieIcfgContainer [2023-08-26 15:26:34,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:26:34,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:26:34,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:26:34,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:26:34,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:26:32" (1/3) ... [2023-08-26 15:26:34,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2ca833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:26:34, skipping insertion in model container [2023-08-26 15:26:34,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:26:33" (2/3) ... [2023-08-26 15:26:34,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2ca833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:26:34, skipping insertion in model container [2023-08-26 15:26:34,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:26:34" (3/3) ... [2023-08-26 15:26:34,113 INFO L112 eAbstractionObserver]: Analyzing ICFG race-4_1-thread_local_vars.i [2023-08-26 15:26:34,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:26:34,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-26 15:26:34,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:26:34,229 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 15:26:34,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 15:26:34,418 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 15:26:34,419 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:26:34,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 41/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 985 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 237. Up to 11 conditions per place. [2023-08-26 15:26:34,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 15:26:34,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 225 transitions, 467 flow [2023-08-26 15:26:34,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:26:34,448 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 225 transitions, 467 flow [2023-08-26 15:26:34,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 225 transitions, 467 flow [2023-08-26 15:26:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 225 transitions, 467 flow [2023-08-26 15:26:34,521 INFO L124 PetriNetUnfolderBase]: 38/328 cut-off events. [2023-08-26 15:26:34,522 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:26:34,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 328 events. 38/328 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 814 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 234. Up to 11 conditions per place. [2023-08-26 15:26:34,535 INFO L119 LiptonReduction]: Number of co-enabled transitions 11560 [2023-08-26 15:26:40,630 INFO L134 LiptonReduction]: Checked pairs total: 19469 [2023-08-26 15:26:40,630 INFO L136 LiptonReduction]: Total number of compositions: 296 [2023-08-26 15:26:40,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 15:26:40,657 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5b1864b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:26:40,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-26 15:26:40,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:26:40,670 INFO L124 PetriNetUnfolderBase]: 9/48 cut-off events. [2023-08-26 15:26:40,670 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:26:40,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:40,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:40,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread_usbThread1of1ForFork1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thread_usbThread1of1ForFork1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread_usbErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-26 15:26:40,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash 211878416, now seen corresponding path program 1 times [2023-08-26 15:26:40,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:40,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306753157] [2023-08-26 15:26:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:40,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:41,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:41,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306753157] [2023-08-26 15:26:41,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306753157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:41,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:41,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:41,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328537238] [2023-08-26 15:26:41,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:41,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 648 [2023-08-26 15:26:41,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:41,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 648 [2023-08-26 15:26:41,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:41,226 INFO L124 PetriNetUnfolderBase]: 197/378 cut-off events. [2023-08-26 15:26:41,227 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 15:26:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 378 events. 197/378 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1671 event pairs, 78 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 574. Up to 228 conditions per place. [2023-08-26 15:26:41,228 INFO L140 encePairwiseOnDemand]: 639/648 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2023-08-26 15:26:41,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 185 flow [2023-08-26 15:26:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 932 transitions. [2023-08-26 15:26:41,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794238683127572 [2023-08-26 15:26:41,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 932 transitions. [2023-08-26 15:26:41,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 932 transitions. [2023-08-26 15:26:41,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:41,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 932 transitions. [2023-08-26 15:26:41,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:41,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:41,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:41,267 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 101 flow. Second operand 3 states and 932 transitions. [2023-08-26 15:26:41,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 185 flow [2023-08-26 15:26:41,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 175 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:26:41,271 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 15:26:41,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-26 15:26:41,276 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-08-26 15:26:41,276 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 15:26:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.6666666666667) internal successors, (896), 3 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:41,279 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbThread1of1ForFork1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-26 15:26:41,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-26 15:26:41,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-26 15:26:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:26:41,280 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 15:26:41,282 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-26 15:26:41,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 15:26:41,318 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 15:26:41,318 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:26:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 41/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 985 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 237. Up to 11 conditions per place. [2023-08-26 15:26:41,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 15:26:41,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 247 transitions, 511 flow [2023-08-26 15:26:41,322 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:26:41,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 247 transitions, 511 flow [2023-08-26 15:26:41,323 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 247 transitions, 511 flow [2023-08-26 15:26:41,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 247 transitions, 511 flow [2023-08-26 15:26:41,353 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 15:26:41,353 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:26:41,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 41/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 983 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 237. Up to 11 conditions per place. [2023-08-26 15:26:41,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 11662 [2023-08-26 15:26:48,035 INFO L134 LiptonReduction]: Checked pairs total: 18172 [2023-08-26 15:26:48,035 INFO L136 LiptonReduction]: Total number of compositions: 330 [2023-08-26 15:26:48,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:26:48,038 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5b1864b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:26:48,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-26 15:26:48,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:26:48,039 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:26:48,039 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:26:48,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:48,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:26:48,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:48,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1422, now seen corresponding path program 1 times [2023-08-26 15:26:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:48,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535581706] [2023-08-26 15:26:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:48,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535581706] [2023-08-26 15:26:48,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535581706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:48,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:48,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:26:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248890136] [2023-08-26 15:26:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:48,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:26:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:26:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:26:48,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 682 [2023-08-26 15:26:48,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 121 flow. Second operand has 2 states, 2 states have (on average 314.5) internal successors, (629), 2 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:48,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 682 [2023-08-26 15:26:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:48,167 INFO L124 PetriNetUnfolderBase]: 585/965 cut-off events. [2023-08-26 15:26:48,167 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-26 15:26:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 965 events. 585/965 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4512 event pairs, 336 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 1712. Up to 857 conditions per place. [2023-08-26 15:26:48,173 INFO L140 encePairwiseOnDemand]: 676/682 looper letters, 33 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-08-26 15:26:48,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 175 flow [2023-08-26 15:26:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:26:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:26:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 667 transitions. [2023-08-26 15:26:48,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48900293255131966 [2023-08-26 15:26:48,176 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 667 transitions. [2023-08-26 15:26:48,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 667 transitions. [2023-08-26 15:26:48,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:48,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 667 transitions. [2023-08-26 15:26:48,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 333.5) internal successors, (667), 2 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 682.0) internal successors, (2046), 3 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,181 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 682.0) internal successors, (2046), 3 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,182 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 121 flow. Second operand 2 states and 667 transitions. [2023-08-26 15:26:48,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 175 flow [2023-08-26 15:26:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:48,184 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 105 flow [2023-08-26 15:26:48,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-08-26 15:26:48,185 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-26 15:26:48,185 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 105 flow [2023-08-26 15:26:48,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 314.5) internal successors, (629), 2 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:48,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 15:26:48,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:26:48,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:48,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1412255, now seen corresponding path program 1 times [2023-08-26 15:26:48,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:48,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997575449] [2023-08-26 15:26:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:48,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:48,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997575449] [2023-08-26 15:26:48,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997575449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:48,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:48,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50144266] [2023-08-26 15:26:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:48,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:48,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:48,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 682 [2023-08-26 15:26:48,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:48,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 682 [2023-08-26 15:26:48,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:48,425 INFO L124 PetriNetUnfolderBase]: 585/977 cut-off events. [2023-08-26 15:26:48,425 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-26 15:26:48,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1865 conditions, 977 events. 585/977 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 4738 event pairs, 336 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 1861. Up to 855 conditions per place. [2023-08-26 15:26:48,431 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 32 selfloop transitions, 0 changer transitions 2/47 dead transitions. [2023-08-26 15:26:48,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 175 flow [2023-08-26 15:26:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 956 transitions. [2023-08-26 15:26:48,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46725317693059626 [2023-08-26 15:26:48,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 956 transitions. [2023-08-26 15:26:48,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 956 transitions. [2023-08-26 15:26:48,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:48,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 956 transitions. [2023-08-26 15:26:48,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.6666666666667) internal successors, (956), 3 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,441 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 105 flow. Second operand 3 states and 956 transitions. [2023-08-26 15:26:48,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 175 flow [2023-08-26 15:26:48,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:26:48,445 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 107 flow [2023-08-26 15:26:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-26 15:26:48,447 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 15:26:48,447 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 107 flow [2023-08-26 15:26:48,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.6666666666667) internal successors, (923), 3 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:48,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:26:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:26:48,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:48,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:48,449 INFO L85 PathProgramCache]: Analyzing trace with hash 43254504, now seen corresponding path program 1 times [2023-08-26 15:26:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:48,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854950167] [2023-08-26 15:26:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:48,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854950167] [2023-08-26 15:26:48,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854950167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:48,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:48,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:26:48,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442890267] [2023-08-26 15:26:48,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:48,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:48,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:48,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 682 [2023-08-26 15:26:48,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:48,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 682 [2023-08-26 15:26:48,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:48,747 INFO L124 PetriNetUnfolderBase]: 987/1491 cut-off events. [2023-08-26 15:26:48,747 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-26 15:26:48,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3104 conditions, 1491 events. 987/1491 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7040 event pairs, 591 based on Foata normal form. 0/688 useless extension candidates. Maximal degree in co-relation 3098. Up to 1428 conditions per place. [2023-08-26 15:26:48,754 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 36 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 15:26:48,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2023-08-26 15:26:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-08-26 15:26:48,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43255131964809385 [2023-08-26 15:26:48,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-08-26 15:26:48,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-08-26 15:26:48,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:48,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-08-26 15:26:48,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.0) internal successors, (885), 3 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,765 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 107 flow. Second operand 3 states and 885 transitions. [2023-08-26 15:26:48,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2023-08-26 15:26:48,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 173 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 15:26:48,769 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 101 flow [2023-08-26 15:26:48,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-26 15:26:48,771 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 15:26:48,772 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 101 flow [2023-08-26 15:26:48,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:48,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:26:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:26:48,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:48,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash 43254502, now seen corresponding path program 1 times [2023-08-26 15:26:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217419364] [2023-08-26 15:26:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:48,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:48,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217419364] [2023-08-26 15:26:48,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217419364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:48,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:48,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:26:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745195360] [2023-08-26 15:26:48,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:48,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:48,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:48,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 682 [2023-08-26 15:26:48,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:48,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:48,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 682 [2023-08-26 15:26:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:49,177 INFO L124 PetriNetUnfolderBase]: 1804/2733 cut-off events. [2023-08-26 15:26:49,177 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 15:26:49,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2733 events. 1804/2733 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12796 event pairs, 729 based on Foata normal form. 0/1302 useless extension candidates. Maximal degree in co-relation 5424. Up to 1420 conditions per place. [2023-08-26 15:26:49,192 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 66 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-26 15:26:49,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 313 flow [2023-08-26 15:26:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-08-26 15:26:49,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423264907135875 [2023-08-26 15:26:49,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-08-26 15:26:49,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-08-26 15:26:49,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:49,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-08-26 15:26:49,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.6666666666667) internal successors, (905), 3 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,202 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 101 flow. Second operand 3 states and 905 transitions. [2023-08-26 15:26:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 313 flow [2023-08-26 15:26:49,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 75 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:26:49,206 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 121 flow [2023-08-26 15:26:49,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-26 15:26:49,208 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 15:26:49,209 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 121 flow [2023-08-26 15:26:49,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:49,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:26:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:26:49,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:49,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1340935741, now seen corresponding path program 1 times [2023-08-26 15:26:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299889903] [2023-08-26 15:26:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:49,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:49,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299889903] [2023-08-26 15:26:49,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299889903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:49,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:49,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835294470] [2023-08-26 15:26:49,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:49,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:26:49,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:26:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:26:49,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 682 [2023-08-26 15:26:49,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:49,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 682 [2023-08-26 15:26:49,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:49,685 INFO L124 PetriNetUnfolderBase]: 1726/2623 cut-off events. [2023-08-26 15:26:49,686 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 15:26:49,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 2623 events. 1726/2623 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12273 event pairs, 1014 based on Foata normal form. 0/1312 useless extension candidates. Maximal degree in co-relation 5291. Up to 2485 conditions per place. [2023-08-26 15:26:49,699 INFO L140 encePairwiseOnDemand]: 680/682 looper letters, 37 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 15:26:49,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 195 flow [2023-08-26 15:26:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-08-26 15:26:49,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345063538611926 [2023-08-26 15:26:49,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-08-26 15:26:49,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-08-26 15:26:49,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:49,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-08-26 15:26:49,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,711 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 121 flow. Second operand 3 states and 889 transitions. [2023-08-26 15:26:49,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 195 flow [2023-08-26 15:26:49,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:26:49,713 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 118 flow [2023-08-26 15:26:49,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-08-26 15:26:49,713 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 15:26:49,717 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 118 flow [2023-08-26 15:26:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:49,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:26:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:26:49,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:49,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1340935740, now seen corresponding path program 1 times [2023-08-26 15:26:49,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:49,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932224883] [2023-08-26 15:26:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932224883] [2023-08-26 15:26:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932224883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:49,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:49,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776752228] [2023-08-26 15:26:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:26:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:26:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:26:49,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 682 [2023-08-26 15:26:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 682 [2023-08-26 15:26:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:50,153 INFO L124 PetriNetUnfolderBase]: 1805/2759 cut-off events. [2023-08-26 15:26:50,153 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-26 15:26:50,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5607 conditions, 2759 events. 1805/2759 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13348 event pairs, 709 based on Foata normal form. 0/1431 useless extension candidates. Maximal degree in co-relation 5600. Up to 1363 conditions per place. [2023-08-26 15:26:50,168 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 91 selfloop transitions, 6 changer transitions 0/102 dead transitions. [2023-08-26 15:26:50,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 102 transitions, 456 flow [2023-08-26 15:26:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:26:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:26:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1218 transitions. [2023-08-26 15:26:50,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464809384164223 [2023-08-26 15:26:50,172 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1218 transitions. [2023-08-26 15:26:50,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1218 transitions. [2023-08-26 15:26:50,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:50,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1218 transitions. [2023-08-26 15:26:50,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.5) internal successors, (1218), 4 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,180 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 118 flow. Second operand 4 states and 1218 transitions. [2023-08-26 15:26:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 102 transitions, 456 flow [2023-08-26 15:26:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 102 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:26:50,185 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 159 flow [2023-08-26 15:26:50,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-26 15:26:50,186 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-26 15:26:50,186 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 159 flow [2023-08-26 15:26:50,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.25) internal successors, (1125), 4 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:50,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:26:50,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:26:50,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread_usbErr7ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:50,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1382104397, now seen corresponding path program 1 times [2023-08-26 15:26:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665941387] [2023-08-26 15:26:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:50,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:50,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665941387] [2023-08-26 15:26:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665941387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:50,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:50,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:50,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972175377] [2023-08-26 15:26:50,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:50,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:26:50,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:26:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:26:50,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 682 [2023-08-26 15:26:50,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:50,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 682 [2023-08-26 15:26:50,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:50,575 INFO L124 PetriNetUnfolderBase]: 1434/2334 cut-off events. [2023-08-26 15:26:50,575 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-26 15:26:50,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 2334 events. 1434/2334 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11440 event pairs, 384 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 4710. Up to 1012 conditions per place. [2023-08-26 15:26:50,585 INFO L140 encePairwiseOnDemand]: 673/682 looper letters, 66 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-26 15:26:50,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 405 flow [2023-08-26 15:26:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:26:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:26:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1553 transitions. [2023-08-26 15:26:50,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455425219941349 [2023-08-26 15:26:50,590 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1553 transitions. [2023-08-26 15:26:50,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1553 transitions. [2023-08-26 15:26:50,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:50,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1553 transitions. [2023-08-26 15:26:50,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,599 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 159 flow. Second operand 5 states and 1553 transitions. [2023-08-26 15:26:50,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 405 flow [2023-08-26 15:26:50,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:26:50,602 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 236 flow [2023-08-26 15:26:50,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-08-26 15:26:50,603 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2023-08-26 15:26:50,603 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 236 flow [2023-08-26 15:26:50,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 296.5) internal successors, (1186), 4 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:50,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:26:50,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread_ath9kErr0ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:50,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1025494907, now seen corresponding path program 1 times [2023-08-26 15:26:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670079903] [2023-08-26 15:26:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:50,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670079903] [2023-08-26 15:26:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670079903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:50,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:50,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722591050] [2023-08-26 15:26:50,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:50,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:50,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 682 [2023-08-26 15:26:50,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:50,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 682 [2023-08-26 15:26:50,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:50,931 INFO L124 PetriNetUnfolderBase]: 1570/2475 cut-off events. [2023-08-26 15:26:50,931 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-08-26 15:26:50,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 2475 events. 1570/2475 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11314 event pairs, 450 based on Foata normal form. 114/1909 useless extension candidates. Maximal degree in co-relation 6477. Up to 1208 conditions per place. [2023-08-26 15:26:50,948 INFO L140 encePairwiseOnDemand]: 674/682 looper letters, 60 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-08-26 15:26:50,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 494 flow [2023-08-26 15:26:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-26 15:26:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46432062561094817 [2023-08-26 15:26:50,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-26 15:26:50,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-26 15:26:50,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:50,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-26 15:26:50,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.6666666666667) internal successors, (950), 3 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,958 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 236 flow. Second operand 3 states and 950 transitions. [2023-08-26 15:26:50,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 494 flow [2023-08-26 15:26:50,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:26:50,963 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 371 flow [2023-08-26 15:26:50,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=371, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-08-26 15:26:50,964 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 13 predicate places. [2023-08-26 15:26:50,964 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 371 flow [2023-08-26 15:26:50,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:50,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:50,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:50,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:26:50,965 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread_ath9kErr0ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:50,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1303594150, now seen corresponding path program 1 times [2023-08-26 15:26:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:50,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167384016] [2023-08-26 15:26:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:51,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:51,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167384016] [2023-08-26 15:26:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167384016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976408741] [2023-08-26 15:26:51,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:51,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 682 [2023-08-26 15:26:51,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:51,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 682 [2023-08-26 15:26:51,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:51,397 INFO L124 PetriNetUnfolderBase]: 2118/3500 cut-off events. [2023-08-26 15:26:51,397 INFO L125 PetriNetUnfolderBase]: For 4377/4435 co-relation queries the response was YES. [2023-08-26 15:26:51,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10390 conditions, 3500 events. 2118/3500 cut-off events. For 4377/4435 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18655 event pairs, 616 based on Foata normal form. 84/2690 useless extension candidates. Maximal degree in co-relation 10375. Up to 2055 conditions per place. [2023-08-26 15:26:51,421 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 76 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2023-08-26 15:26:51,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 688 flow [2023-08-26 15:26:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-26 15:26:51,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809384164222874 [2023-08-26 15:26:51,425 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-26 15:26:51,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-26 15:26:51,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:51,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-26 15:26:51,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,437 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 371 flow. Second operand 3 states and 984 transitions. [2023-08-26 15:26:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 688 flow [2023-08-26 15:26:51,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 94 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:51,454 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 379 flow [2023-08-26 15:26:51,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2023-08-26 15:26:51,455 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-26 15:26:51,455 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 379 flow [2023-08-26 15:26:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:26:51,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:51,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1408607266, now seen corresponding path program 1 times [2023-08-26 15:26:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:51,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257668432] [2023-08-26 15:26:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:51,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:51,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257668432] [2023-08-26 15:26:51,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257668432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:51,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725962033] [2023-08-26 15:26:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:51,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 682 [2023-08-26 15:26:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 379 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:51,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:51,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 682 [2023-08-26 15:26:51,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:52,079 INFO L124 PetriNetUnfolderBase]: 2901/4599 cut-off events. [2023-08-26 15:26:52,079 INFO L125 PetriNetUnfolderBase]: For 5695/5795 co-relation queries the response was YES. [2023-08-26 15:26:52,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14082 conditions, 4599 events. 2901/4599 cut-off events. For 5695/5795 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 25319 event pairs, 870 based on Foata normal form. 60/3679 useless extension candidates. Maximal degree in co-relation 14066. Up to 2293 conditions per place. [2023-08-26 15:26:52,105 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 94 selfloop transitions, 4 changer transitions 1/107 dead transitions. [2023-08-26 15:26:52,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 107 transitions, 824 flow [2023-08-26 15:26:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-08-26 15:26:52,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2023-08-26 15:26:52,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-08-26 15:26:52,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-08-26 15:26:52,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:52,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-08-26 15:26:52,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.0) internal successors, (912), 3 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,114 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 379 flow. Second operand 3 states and 912 transitions. [2023-08-26 15:26:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 107 transitions, 824 flow [2023-08-26 15:26:52,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 107 transitions, 812 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:52,122 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 379 flow [2023-08-26 15:26:52,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=379, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2023-08-26 15:26:52,123 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2023-08-26 15:26:52,123 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 379 flow [2023-08-26 15:26:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:26:52,123 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:52,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1408607267, now seen corresponding path program 1 times [2023-08-26 15:26:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:52,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316704754] [2023-08-26 15:26:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:52,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:52,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316704754] [2023-08-26 15:26:52,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316704754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:52,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:52,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445223182] [2023-08-26 15:26:52,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:52,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:52,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:52,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 682 [2023-08-26 15:26:52,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 379 flow. Second operand has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:52,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 682 [2023-08-26 15:26:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:52,820 INFO L124 PetriNetUnfolderBase]: 3995/6091 cut-off events. [2023-08-26 15:26:52,820 INFO L125 PetriNetUnfolderBase]: For 8530/8654 co-relation queries the response was YES. [2023-08-26 15:26:52,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19133 conditions, 6091 events. 3995/6091 cut-off events. For 8530/8654 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33712 event pairs, 1322 based on Foata normal form. 112/5155 useless extension candidates. Maximal degree in co-relation 19117. Up to 3617 conditions per place. [2023-08-26 15:26:52,858 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 96 selfloop transitions, 12 changer transitions 1/115 dead transitions. [2023-08-26 15:26:52,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 889 flow [2023-08-26 15:26:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-26 15:26:52,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447702834799609 [2023-08-26 15:26:52,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-26 15:26:52,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-26 15:26:52,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:52,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-26 15:26:52,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.3333333333333) internal successors, (910), 3 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,868 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 379 flow. Second operand 3 states and 910 transitions. [2023-08-26 15:26:52,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 889 flow [2023-08-26 15:26:52,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 115 transitions, 881 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:52,886 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 511 flow [2023-08-26 15:26:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=511, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-08-26 15:26:52,888 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2023-08-26 15:26:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 511 flow [2023-08-26 15:26:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:52,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:52,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:26:52,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread_ath9kErr0ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:52,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash -413998488, now seen corresponding path program 1 times [2023-08-26 15:26:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:52,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146346323] [2023-08-26 15:26:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:52,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146346323] [2023-08-26 15:26:52,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146346323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:52,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:52,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:52,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153394496] [2023-08-26 15:26:52,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:52,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:52,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:52,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 682 [2023-08-26 15:26:52,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 511 flow. Second operand has 3 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:52,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:52,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 682 [2023-08-26 15:26:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:53,110 INFO L124 PetriNetUnfolderBase]: 671/1253 cut-off events. [2023-08-26 15:26:53,110 INFO L125 PetriNetUnfolderBase]: For 1731/1731 co-relation queries the response was YES. [2023-08-26 15:26:53,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3498 conditions, 1253 events. 671/1253 cut-off events. For 1731/1731 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6063 event pairs, 144 based on Foata normal form. 182/1183 useless extension candidates. Maximal degree in co-relation 3481. Up to 591 conditions per place. [2023-08-26 15:26:53,117 INFO L140 encePairwiseOnDemand]: 675/682 looper letters, 41 selfloop transitions, 15 changer transitions 3/70 dead transitions. [2023-08-26 15:26:53,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 567 flow [2023-08-26 15:26:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-08-26 15:26:53,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-26 15:26:53,120 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-08-26 15:26:53,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-08-26 15:26:53,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:53,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-08-26 15:26:53,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,126 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 511 flow. Second operand 3 states and 930 transitions. [2023-08-26 15:26:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 567 flow [2023-08-26 15:26:53,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 480 flow, removed 19 selfloop flow, removed 7 redundant places. [2023-08-26 15:26:53,131 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 383 flow [2023-08-26 15:26:53,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=383, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-26 15:26:53,131 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2023-08-26 15:26:53,132 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 383 flow [2023-08-26 15:26:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:53,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:53,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:26:53,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:53,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -717126589, now seen corresponding path program 1 times [2023-08-26 15:26:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52299153] [2023-08-26 15:26:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:26:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:53,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52299153] [2023-08-26 15:26:53,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52299153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:53,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:53,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118891819] [2023-08-26 15:26:53,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:53,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:53,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 682 [2023-08-26 15:26:53,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:53,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 682 [2023-08-26 15:26:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:53,347 INFO L124 PetriNetUnfolderBase]: 677/1228 cut-off events. [2023-08-26 15:26:53,347 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-08-26 15:26:53,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1228 events. 677/1228 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5653 event pairs, 364 based on Foata normal form. 5/1073 useless extension candidates. Maximal degree in co-relation 3211. Up to 1066 conditions per place. [2023-08-26 15:26:53,354 INFO L140 encePairwiseOnDemand]: 680/682 looper letters, 42 selfloop transitions, 0 changer transitions 6/57 dead transitions. [2023-08-26 15:26:53,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 477 flow [2023-08-26 15:26:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2023-08-26 15:26:53,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496578690127077 [2023-08-26 15:26:53,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2023-08-26 15:26:53,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2023-08-26 15:26:53,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:53,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2023-08-26 15:26:53,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.6666666666667) internal successors, (920), 3 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,364 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 383 flow. Second operand 3 states and 920 transitions. [2023-08-26 15:26:53,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 477 flow [2023-08-26 15:26:53,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:26:53,368 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 310 flow [2023-08-26 15:26:53,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-08-26 15:26:53,368 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2023-08-26 15:26:53,368 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 310 flow [2023-08-26 15:26:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 300.6666666666667) internal successors, (902), 3 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:53,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:53,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:26:53,371 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:53,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash -371438922, now seen corresponding path program 1 times [2023-08-26 15:26:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:53,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583995359] [2023-08-26 15:26:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583995359] [2023-08-26 15:26:53,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583995359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:53,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:53,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499460678] [2023-08-26 15:26:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:53,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 682 [2023-08-26 15:26:53,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:53,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 682 [2023-08-26 15:26:53,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:53,644 INFO L124 PetriNetUnfolderBase]: 1092/1755 cut-off events. [2023-08-26 15:26:53,645 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2023-08-26 15:26:53,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 1755 events. 1092/1755 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8003 event pairs, 323 based on Foata normal form. 0/1495 useless extension candidates. Maximal degree in co-relation 4583. Up to 937 conditions per place. [2023-08-26 15:26:53,655 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 41 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 15:26:53,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 450 flow [2023-08-26 15:26:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-08-26 15:26:53,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43499511241446726 [2023-08-26 15:26:53,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-08-26 15:26:53,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-08-26 15:26:53,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:53,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-08-26 15:26:53,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,663 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 310 flow. Second operand 3 states and 890 transitions. [2023-08-26 15:26:53,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 450 flow [2023-08-26 15:26:53,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 444 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:53,667 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 330 flow [2023-08-26 15:26:53,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-26 15:26:53,668 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-26 15:26:53,668 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 330 flow [2023-08-26 15:26:53,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:53,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 15:26:53,668 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:53,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:53,669 INFO L85 PathProgramCache]: Analyzing trace with hash -371438923, now seen corresponding path program 1 times [2023-08-26 15:26:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452819992] [2023-08-26 15:26:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:53,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452819992] [2023-08-26 15:26:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452819992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:53,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:26:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289639882] [2023-08-26 15:26:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:26:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:26:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:26:53,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 682 [2023-08-26 15:26:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 682 [2023-08-26 15:26:53,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:53,931 INFO L124 PetriNetUnfolderBase]: 1425/2163 cut-off events. [2023-08-26 15:26:53,932 INFO L125 PetriNetUnfolderBase]: For 1538/1538 co-relation queries the response was YES. [2023-08-26 15:26:53,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5899 conditions, 2163 events. 1425/2163 cut-off events. For 1538/1538 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9818 event pairs, 393 based on Foata normal form. 0/1878 useless extension candidates. Maximal degree in co-relation 5885. Up to 1115 conditions per place. [2023-08-26 15:26:53,945 INFO L140 encePairwiseOnDemand]: 679/682 looper letters, 44 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 15:26:53,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 480 flow [2023-08-26 15:26:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:26:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:26:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2023-08-26 15:26:53,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43206256109481916 [2023-08-26 15:26:53,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2023-08-26 15:26:53,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2023-08-26 15:26:53,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:53,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2023-08-26 15:26:53,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,953 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 330 flow. Second operand 3 states and 884 transitions. [2023-08-26 15:26:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 480 flow [2023-08-26 15:26:53,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 452 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:53,959 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 328 flow [2023-08-26 15:26:53,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-08-26 15:26:53,960 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-26 15:26:53,960 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 328 flow [2023-08-26 15:26:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:53,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:53,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:53,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 15:26:53,961 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:53,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash -470037772, now seen corresponding path program 1 times [2023-08-26 15:26:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:53,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908817327] [2023-08-26 15:26:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:53,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:54,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908817327] [2023-08-26 15:26:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908817327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:54,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:54,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:26:54,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151441415] [2023-08-26 15:26:54,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:54,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:26:54,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:26:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:26:54,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 682 [2023-08-26 15:26:54,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 277.8) internal successors, (1389), 5 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:54,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 682 [2023-08-26 15:26:54,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:54,312 INFO L124 PetriNetUnfolderBase]: 1269/1927 cut-off events. [2023-08-26 15:26:54,312 INFO L125 PetriNetUnfolderBase]: For 1436/1436 co-relation queries the response was YES. [2023-08-26 15:26:54,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5251 conditions, 1927 events. 1269/1927 cut-off events. For 1436/1436 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8411 event pairs, 386 based on Foata normal form. 80/1752 useless extension candidates. Maximal degree in co-relation 5237. Up to 1097 conditions per place. [2023-08-26 15:26:54,323 INFO L140 encePairwiseOnDemand]: 677/682 looper letters, 39 selfloop transitions, 15 changer transitions 2/58 dead transitions. [2023-08-26 15:26:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 466 flow [2023-08-26 15:26:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:26:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:26:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1140 transitions. [2023-08-26 15:26:54,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178885630498534 [2023-08-26 15:26:54,326 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1140 transitions. [2023-08-26 15:26:54,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1140 transitions. [2023-08-26 15:26:54,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:54,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1140 transitions. [2023-08-26 15:26:54,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,333 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,333 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 328 flow. Second operand 4 states and 1140 transitions. [2023-08-26 15:26:54,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 466 flow [2023-08-26 15:26:54,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 430 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 15:26:54,338 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-08-26 15:26:54,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-26 15:26:54,338 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-26 15:26:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-08-26 15:26:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.8) internal successors, (1389), 5 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:54,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 15:26:54,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:54,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:54,339 INFO L85 PathProgramCache]: Analyzing trace with hash -662357316, now seen corresponding path program 1 times [2023-08-26 15:26:54,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:54,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506422655] [2023-08-26 15:26:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:54,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506422655] [2023-08-26 15:26:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506422655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:54,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496885830] [2023-08-26 15:26:54,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:26:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:26:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:26:54,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 682 [2023-08-26 15:26:54,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:54,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 682 [2023-08-26 15:26:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:54,752 INFO L124 PetriNetUnfolderBase]: 882/1367 cut-off events. [2023-08-26 15:26:54,752 INFO L125 PetriNetUnfolderBase]: For 1130/1130 co-relation queries the response was YES. [2023-08-26 15:26:54,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3772 conditions, 1367 events. 882/1367 cut-off events. For 1130/1130 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5607 event pairs, 256 based on Foata normal form. 86/1266 useless extension candidates. Maximal degree in co-relation 3758. Up to 776 conditions per place. [2023-08-26 15:26:54,758 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 36 selfloop transitions, 14 changer transitions 2/54 dead transitions. [2023-08-26 15:26:54,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 440 flow [2023-08-26 15:26:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:26:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:26:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2023-08-26 15:26:54,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-08-26 15:26:54,761 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2023-08-26 15:26:54,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2023-08-26 15:26:54,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:54,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2023-08-26 15:26:54,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,768 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 4 states and 1144 transitions. [2023-08-26 15:26:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 440 flow [2023-08-26 15:26:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 405 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:26:54,771 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 289 flow [2023-08-26 15:26:54,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-26 15:26:54,772 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-26 15:26:54,772 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 289 flow [2023-08-26 15:26:54,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:54,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 15:26:54,773 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1262198131, now seen corresponding path program 1 times [2023-08-26 15:26:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916196908] [2023-08-26 15:26:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:54,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916196908] [2023-08-26 15:26:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916196908] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:54,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:26:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590125936] [2023-08-26 15:26:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:26:54,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:26:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:26:54,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 682 [2023-08-26 15:26:54,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:54,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:54,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 682 [2023-08-26 15:26:54,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:55,182 INFO L124 PetriNetUnfolderBase]: 1161/1811 cut-off events. [2023-08-26 15:26:55,182 INFO L125 PetriNetUnfolderBase]: For 1499/1499 co-relation queries the response was YES. [2023-08-26 15:26:55,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 1811 events. 1161/1811 cut-off events. For 1499/1499 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8363 event pairs, 301 based on Foata normal form. 4/1549 useless extension candidates. Maximal degree in co-relation 4968. Up to 775 conditions per place. [2023-08-26 15:26:55,190 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 44 selfloop transitions, 7 changer transitions 34/87 dead transitions. [2023-08-26 15:26:55,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 87 transitions, 721 flow [2023-08-26 15:26:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:26:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:26:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2023-08-26 15:26:55,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42961876832844575 [2023-08-26 15:26:55,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2023-08-26 15:26:55,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2023-08-26 15:26:55,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:55,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2023-08-26 15:26:55,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,201 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 682.0) internal successors, (3410), 5 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,201 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 289 flow. Second operand 4 states and 1172 transitions. [2023-08-26 15:26:55,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 87 transitions, 721 flow [2023-08-26 15:26:55,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 671 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:26:55,206 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 294 flow [2023-08-26 15:26:55,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-26 15:26:55,206 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-08-26 15:26:55,206 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 294 flow [2023-08-26 15:26:55,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:26:55,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 15:26:55,207 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2023-08-26 15:26:55,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:26:55,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1442690953, now seen corresponding path program 2 times [2023-08-26 15:26:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:26:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57489172] [2023-08-26 15:26:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:26:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:26:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:26:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 15:26:55,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:26:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57489172] [2023-08-26 15:26:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57489172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:26:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:26:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:26:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418365341] [2023-08-26 15:26:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:26:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:26:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:26:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:26:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:26:55,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 682 [2023-08-26 15:26:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:26:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 682 [2023-08-26 15:26:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:26:55,560 INFO L124 PetriNetUnfolderBase]: 834/1285 cut-off events. [2023-08-26 15:26:55,560 INFO L125 PetriNetUnfolderBase]: For 1235/1235 co-relation queries the response was YES. [2023-08-26 15:26:55,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 1285 events. 834/1285 cut-off events. For 1235/1235 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5244 event pairs, 132 based on Foata normal form. 4/1104 useless extension candidates. Maximal degree in co-relation 3554. Up to 510 conditions per place. [2023-08-26 15:26:55,563 INFO L140 encePairwiseOnDemand]: 678/682 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-26 15:26:55,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 594 flow [2023-08-26 15:26:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:26:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:26:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1448 transitions. [2023-08-26 15:26:55,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424633431085044 [2023-08-26 15:26:55,567 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1448 transitions. [2023-08-26 15:26:55,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1448 transitions. [2023-08-26 15:26:55,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:26:55,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1448 transitions. [2023-08-26 15:26:55,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,575 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 682.0) internal successors, (4092), 6 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,575 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 294 flow. Second operand 5 states and 1448 transitions. [2023-08-26 15:26:55,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 594 flow [2023-08-26 15:26:55,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 566 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 15:26:55,579 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-26 15:26:55,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-26 15:26:55,580 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-26 15:26:55,580 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-26 15:26:55,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 282.0) internal successors, (1410), 5 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:26:55,580 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 27 remaining) [2023-08-26 15:26:55,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 27 remaining) [2023-08-26 15:26:55,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 27 remaining) [2023-08-26 15:26:55,581 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (20 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONASSERT (18 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONASSERT (16 of 27 remaining) [2023-08-26 15:26:55,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONASSERT (15 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONASSERT (11 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONASSERT (10 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (9 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONASSERT (7 of 27 remaining) [2023-08-26 15:26:55,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONASSERT (1 of 27 remaining) [2023-08-26 15:26:55,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 27 remaining) [2023-08-26 15:26:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 15:26:55,584 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:26:55,585 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (2/2) [2023-08-26 15:26:55,588 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:26:55,588 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:26:55,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:26:55 BasicIcfg [2023-08-26 15:26:55,591 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:26:55,591 INFO L158 Benchmark]: Toolchain (without parser) took 23202.10ms. Allocated memory was 364.9MB in the beginning and 847.2MB in the end (delta: 482.3MB). Free memory was 338.4MB in the beginning and 390.9MB in the end (delta: -52.5MB). Peak memory consumption was 432.0MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,592 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 364.9MB. Free memory is still 341.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:26:55,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 860.58ms. Allocated memory is still 364.9MB. Free memory was 338.0MB in the beginning and 334.5MB in the end (delta: 3.4MB). Peak memory consumption was 61.8MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,592 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.97ms. Allocated memory is still 364.9MB. Free memory was 333.7MB in the beginning and 330.3MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,592 INFO L158 Benchmark]: Boogie Preprocessor took 40.66ms. Allocated memory is still 364.9MB. Free memory was 330.3MB in the beginning and 327.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,593 INFO L158 Benchmark]: RCFGBuilder took 733.42ms. Allocated memory was 364.9MB in the beginning and 486.5MB in the end (delta: 121.6MB). Free memory was 327.4MB in the beginning and 452.9MB in the end (delta: -125.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,593 INFO L158 Benchmark]: TraceAbstraction took 21483.36ms. Allocated memory was 486.5MB in the beginning and 847.2MB in the end (delta: 360.7MB). Free memory was 452.8MB in the beginning and 390.9MB in the end (delta: 61.9MB). Peak memory consumption was 422.6MB. Max. memory is 16.0GB. [2023-08-26 15:26:55,594 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 364.9MB. Free memory is still 341.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 860.58ms. Allocated memory is still 364.9MB. Free memory was 338.0MB in the beginning and 334.5MB in the end (delta: 3.4MB). Peak memory consumption was 61.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 76.97ms. Allocated memory is still 364.9MB. Free memory was 333.7MB in the beginning and 330.3MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.66ms. Allocated memory is still 364.9MB. Free memory was 330.3MB in the beginning and 327.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 733.42ms. Allocated memory was 364.9MB in the beginning and 486.5MB in the end (delta: 121.6MB). Free memory was 327.4MB in the beginning and 452.9MB in the end (delta: -125.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 21483.36ms. Allocated memory was 486.5MB in the beginning and 847.2MB in the end (delta: 360.7MB). Free memory was 452.8MB in the beginning and 390.9MB in the end (delta: 61.9MB). Peak memory consumption was 422.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 729]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [729] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.2s, 205 PlacesBefore, 40 PlacesAfterwards, 225 TransitionsBefore, 42 TransitionsAfterwards, 11560 CoEnabledTransitionPairs, 8 FixpointIterations, 52 TrivialSequentialCompositions, 164 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 54 ConcurrentYvCompositions, 18 ChoiceCompositions, 296 TotalNumberOfCompositions, 19469 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 14199, independent: 13942, independent conditional: 0, independent unconditional: 13942, dependent: 257, dependent conditional: 0, dependent unconditional: 257, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7079, independent: 6999, independent conditional: 0, independent unconditional: 6999, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 14199, independent: 6943, independent conditional: 0, independent unconditional: 6943, dependent: 177, dependent conditional: 0, dependent unconditional: 177, unknown: 7079, unknown conditional: 0, unknown unconditional: 7079] , Statistics on independence cache: Total cache size (in pairs): 197, Positive cache size: 177, Positive conditional cache size: 0, Positive unconditional cache size: 177, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.7s, 224 PlacesBefore, 48 PlacesAfterwards, 247 TransitionsBefore, 52 TransitionsAfterwards, 11662 CoEnabledTransitionPairs, 8 FixpointIterations, 83 TrivialSequentialCompositions, 165 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 56 ConcurrentYvCompositions, 19 ChoiceCompositions, 330 TotalNumberOfCompositions, 18172 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13499, independent: 13242, independent conditional: 0, independent unconditional: 13242, dependent: 257, dependent conditional: 0, dependent unconditional: 257, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7090, independent: 7022, independent conditional: 0, independent unconditional: 7022, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13499, independent: 6220, independent conditional: 0, independent unconditional: 6220, dependent: 189, dependent conditional: 0, dependent unconditional: 189, unknown: 7090, unknown conditional: 0, unknown unconditional: 7090] , Statistics on independence cache: Total cache size (in pairs): 197, Positive cache size: 178, Positive conditional cache size: 0, Positive unconditional cache size: 178, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 342 locations, 30 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.0s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62 IncrementalHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 62 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 342 locations, 30 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.3s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 451 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1508 IncrementalHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 17 mSDtfsCounter, 1508 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=511occurred in iteration=11, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 723 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 13/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:26:55,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...