/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 PROGRAM_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 18:30:40,002 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:30:40,069 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 18:30:40,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:30:40,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:30:40,110 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:30:40,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:30:40,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:30:40,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:30:40,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:30:40,116 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:30:40,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:30:40,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:30:40,117 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:30:40,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:30:40,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:30:40,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:30:40,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:30:40,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:30:40,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:30:40,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:30:40,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:30:40,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:30:40,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:30:40,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:30:40,121 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:30:40,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:30:40,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:40,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:30:40,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:30:40,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:30:40,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:30:40,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:30:40,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:30:40,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:30:40,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:30:40,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:30:40,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:30:40,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:30:40,465 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:30:40,465 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:30:40,467 INFO L431 ainManager$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 18:30:41,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:30:42,009 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:30:42,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-4_1-thread_local_vars.i [2023-08-26 18:30:42,035 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cce6da0a/007a3e93a85e4ef78f3dc258222dc920/FLAGed7333034 [2023-08-26 18:30:42,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cce6da0a/007a3e93a85e4ef78f3dc258222dc920 [2023-08-26 18:30:42,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:30:42,054 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:30:42,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:42,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:30:42,060 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:30:42,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:42" (1/1) ... [2023-08-26 18:30:42,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b3a535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:42, skipping insertion in model container [2023-08-26 18:30:42,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:42" (1/1) ... [2023-08-26 18:30:42,125 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:30:42,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:42,835 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:30:42,859 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 18:30:42,860 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 18:30:42,866 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [729] [2023-08-26 18:30:42,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:43,042 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:30:43,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43 WrapperNode [2023-08-26 18:30:43,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:43,044 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:43,044 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:30:43,044 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:30:43,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,133 INFO L138 Inliner]: procedures = 486, calls = 44, calls flagged for inlining = 16, calls inlined = 21, statements flattened = 223 [2023-08-26 18:30:43,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:43,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:30:43,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:30:43,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:30:43,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,175 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:30:43,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:30:43,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:30:43,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:30:43,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (1/1) ... [2023-08-26 18:30:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:30:43,239 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 18:30:43,268 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 18:30:43,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread_usb [2023-08-26 18:30:43,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_usb [2023-08-26 18:30:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:30:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:30:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread_ath9k [2023-08-26 18:30:43,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_ath9k [2023-08-26 18:30:43,285 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:30:43,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:30:43,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:30:43,288 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 18:30:43,558 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:30:43,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:30:43,834 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:30:43,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:30:43,844 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 18:30:43,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:43 BoogieIcfgContainer [2023-08-26 18:30:43,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:30:43,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:30:43,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:30:43,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:30:43,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:30:42" (1/3) ... [2023-08-26 18:30:43,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa0e92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:43, skipping insertion in model container [2023-08-26 18:30:43,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:43" (2/3) ... [2023-08-26 18:30:43,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa0e92b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:43, skipping insertion in model container [2023-08-26 18:30:43,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:43" (3/3) ... [2023-08-26 18:30:43,853 INFO L112 eAbstractionObserver]: Analyzing ICFG race-4_1-thread_local_vars.i [2023-08-26 18:30:43,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:30:43,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-26 18:30:43,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:30:43,948 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-26 18:30:43,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 18:30:44,079 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 18:30:44,079 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:30:44,089 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 18:30:44,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 18:30:44,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 247 transitions, 511 flow [2023-08-26 18:30:44,099 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:30:44,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 247 transitions, 511 flow [2023-08-26 18:30:44,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 247 transitions, 511 flow [2023-08-26 18:30:44,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 247 transitions, 511 flow [2023-08-26 18:30:44,172 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 18:30:44,172 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:30:44,175 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 18:30:44,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 11662 [2023-08-26 18:30:51,429 INFO L134 LiptonReduction]: Checked pairs total: 19533 [2023-08-26 18:30:51,430 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-26 18:30:51,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:30:51,446 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;@6719f775, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:30:51,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2023-08-26 18:30:51,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:30:51,448 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:30:51,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:51,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:51,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:30:51,449 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 18:30:51,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:51,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1122, now seen corresponding path program 1 times [2023-08-26 18:30:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969986660] [2023-08-26 18:30:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:51,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:51,699 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 18:30:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:51,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969986660] [2023-08-26 18:30:51,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969986660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:51,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:51,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:30:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275802663] [2023-08-26 18:30:51,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:30:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:30:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:30:51,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 680 [2023-08-26 18:30:51,740 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 18:30:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:51,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 680 [2023-08-26 18:30:51,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:51,928 INFO L124 PetriNetUnfolderBase]: 585/965 cut-off events. [2023-08-26 18:30:51,928 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-26 18:30:51,931 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 4502 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 18:30:51,960 INFO L140 encePairwiseOnDemand]: 674/680 looper letters, 33 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2023-08-26 18:30:51,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 175 flow [2023-08-26 18:30:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:30:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:30:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 667 transitions. [2023-08-26 18:30:51,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904411764705882 [2023-08-26 18:30:51,978 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 667 transitions. [2023-08-26 18:30:51,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 667 transitions. [2023-08-26 18:30:51,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:51,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 667 transitions. [2023-08-26 18:30:51,988 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 18:30:51,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 680.0) internal successors, (2040), 3 states have internal predecessors, (2040), 0 states have call successors, (0), 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 18:30:51,994 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 680.0) internal successors, (2040), 3 states have internal predecessors, (2040), 0 states have call successors, (0), 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 18:30:51,996 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 121 flow. Second operand 2 states and 667 transitions. [2023-08-26 18:30:51,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 175 flow [2023-08-26 18:30:52,000 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 18:30:52,001 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 105 flow [2023-08-26 18:30:52,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:52,006 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-26 18:30:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 105 flow [2023-08-26 18:30:52,007 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 18:30:52,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:52,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 18:30:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:30:52,008 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 18:30:52,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1113105, now seen corresponding path program 1 times [2023-08-26 18:30:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:52,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230070645] [2023-08-26 18:30:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:52,187 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 18:30:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:52,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230070645] [2023-08-26 18:30:52,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230070645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:52,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:52,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:52,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167985793] [2023-08-26 18:30:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:52,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 680 [2023-08-26 18:30:52,193 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 18:30:52,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:52,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 680 [2023-08-26 18:30:52,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:52,345 INFO L124 PetriNetUnfolderBase]: 585/977 cut-off events. [2023-08-26 18:30:52,345 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-26 18:30:52,346 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 102. Compared 4765 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 18:30:52,352 INFO L140 encePairwiseOnDemand]: 677/680 looper letters, 32 selfloop transitions, 0 changer transitions 2/47 dead transitions. [2023-08-26 18:30:52,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 47 transitions, 175 flow [2023-08-26 18:30:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 956 transitions. [2023-08-26 18:30:52,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46862745098039216 [2023-08-26 18:30:52,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 956 transitions. [2023-08-26 18:30:52,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 956 transitions. [2023-08-26 18:30:52,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:52,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 956 transitions. [2023-08-26 18:30:52,360 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 18:30:52,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:52,366 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:52,366 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 105 flow. Second operand 3 states and 956 transitions. [2023-08-26 18:30:52,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 47 transitions, 175 flow [2023-08-26 18:30:52,369 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 18:30:52,370 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 107 flow [2023-08-26 18:30:52,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:52,374 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 18:30:52,375 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 107 flow [2023-08-26 18:30:52,375 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 18:30:52,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:52,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:30:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:30:52,378 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 18:30:52,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:52,386 INFO L85 PathProgramCache]: Analyzing trace with hash 34397091, now seen corresponding path program 1 times [2023-08-26 18:30:52,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:52,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252097788] [2023-08-26 18:30:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:52,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:52,532 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 18:30:52,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:52,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252097788] [2023-08-26 18:30:52,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252097788] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:52,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:52,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:52,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265555249] [2023-08-26 18:30:52,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:52,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:52,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 680 [2023-08-26 18:30:52,536 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 18:30:52,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:52,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 680 [2023-08-26 18:30:52,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:52,691 INFO L124 PetriNetUnfolderBase]: 987/1491 cut-off events. [2023-08-26 18:30:52,691 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-26 18:30:52,693 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 144. Compared 7093 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 18:30:52,700 INFO L140 encePairwiseOnDemand]: 677/680 looper letters, 36 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 18:30:52,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2023-08-26 18:30:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 885 transitions. [2023-08-26 18:30:52,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2023-08-26 18:30:52,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 885 transitions. [2023-08-26 18:30:52,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 885 transitions. [2023-08-26 18:30:52,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:52,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 885 transitions. [2023-08-26 18:30:52,706 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 18:30:52,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:52,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:52,711 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 107 flow. Second operand 3 states and 885 transitions. [2023-08-26 18:30:52,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2023-08-26 18:30:52,712 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 18:30:52,713 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 101 flow [2023-08-26 18:30:52,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:52,714 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 18:30:52,714 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 101 flow [2023-08-26 18:30:52,715 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 18:30:52,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:52,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:30:52,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:30:52,715 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 18:30:52,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:52,716 INFO L85 PathProgramCache]: Analyzing trace with hash 34397092, now seen corresponding path program 1 times [2023-08-26 18:30:52,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:52,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664510897] [2023-08-26 18:30:52,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:52,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:52,808 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 18:30:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664510897] [2023-08-26 18:30:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664510897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:52,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:52,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734336821] [2023-08-26 18:30:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:52,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:52,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 680 [2023-08-26 18:30:52,814 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 18:30:52,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:52,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 680 [2023-08-26 18:30:52,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:53,133 INFO L124 PetriNetUnfolderBase]: 1804/2733 cut-off events. [2023-08-26 18:30:53,133 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:30:53,136 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 12832 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 18:30:53,147 INFO L140 encePairwiseOnDemand]: 675/680 looper letters, 66 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-26 18:30:53,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 313 flow [2023-08-26 18:30:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 905 transitions. [2023-08-26 18:30:53,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44362745098039214 [2023-08-26 18:30:53,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 905 transitions. [2023-08-26 18:30:53,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 905 transitions. [2023-08-26 18:30:53,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:53,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 905 transitions. [2023-08-26 18:30:53,153 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 18:30:53,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:53,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:53,158 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 101 flow. Second operand 3 states and 905 transitions. [2023-08-26 18:30:53,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 313 flow [2023-08-26 18:30:53,159 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 18:30:53,160 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 121 flow [2023-08-26 18:30:53,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:53,161 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 18:30:53,161 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 121 flow [2023-08-26 18:30:53,162 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 18:30:53,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:53,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:30:53,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:30:53,162 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 18:30:53,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1066352776, now seen corresponding path program 1 times [2023-08-26 18:30:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:53,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769036521] [2023-08-26 18:30:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:53,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:53,351 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 18:30:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:53,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769036521] [2023-08-26 18:30:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769036521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:53,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373997912] [2023-08-26 18:30:53,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:53,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:53,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 680 [2023-08-26 18:30:53,359 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 18:30:53,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:53,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 680 [2023-08-26 18:30:53,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:53,586 INFO L124 PetriNetUnfolderBase]: 1726/2623 cut-off events. [2023-08-26 18:30:53,586 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 18:30:53,590 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 12340 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 18:30:53,602 INFO L140 encePairwiseOnDemand]: 678/680 looper letters, 37 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 18:30:53,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 195 flow [2023-08-26 18:30:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-08-26 18:30:53,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357843137254902 [2023-08-26 18:30:53,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-08-26 18:30:53,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-08-26 18:30:53,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:53,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-08-26 18:30:53,608 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 18:30:53,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:53,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:53,613 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 121 flow. Second operand 3 states and 889 transitions. [2023-08-26 18:30:53,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 195 flow [2023-08-26 18:30:53,614 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 18:30:53,614 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 118 flow [2023-08-26 18:30:53,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:53,615 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 18:30:53,615 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 118 flow [2023-08-26 18:30:53,616 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 18:30:53,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:53,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:30:53,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:30:53,617 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 18:30:53,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1066352775, now seen corresponding path program 1 times [2023-08-26 18:30:53,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:53,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107862673] [2023-08-26 18:30:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:53,735 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 18:30:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107862673] [2023-08-26 18:30:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107862673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:53,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143098621] [2023-08-26 18:30:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:53,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 680 [2023-08-26 18:30:53,740 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 18:30:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 680 [2023-08-26 18:30:53,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:54,095 INFO L124 PetriNetUnfolderBase]: 1805/2759 cut-off events. [2023-08-26 18:30:54,095 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-26 18:30:54,099 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 13324 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 18:30:54,111 INFO L140 encePairwiseOnDemand]: 675/680 looper letters, 91 selfloop transitions, 6 changer transitions 0/102 dead transitions. [2023-08-26 18:30:54,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 102 transitions, 456 flow [2023-08-26 18:30:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1218 transitions. [2023-08-26 18:30:54,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44779411764705884 [2023-08-26 18:30:54,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1218 transitions. [2023-08-26 18:30:54,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1218 transitions. [2023-08-26 18:30:54,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:54,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1218 transitions. [2023-08-26 18:30:54,118 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 18:30:54,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:54,124 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:54,124 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 118 flow. Second operand 4 states and 1218 transitions. [2023-08-26 18:30:54,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 102 transitions, 456 flow [2023-08-26 18:30:54,126 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 18:30:54,127 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 159 flow [2023-08-26 18:30:54,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:54,128 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-26 18:30:54,128 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 159 flow [2023-08-26 18:30:54,129 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 18:30:54,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:54,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:30:54,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:30:54,129 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 18:30:54,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1304128611, now seen corresponding path program 1 times [2023-08-26 18:30:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:54,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416192339] [2023-08-26 18:30:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:54,200 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 18:30:54,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416192339] [2023-08-26 18:30:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416192339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:54,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:54,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419972053] [2023-08-26 18:30:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:54,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:54,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 680 [2023-08-26 18:30:54,205 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 18:30:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:54,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 680 [2023-08-26 18:30:54,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:54,494 INFO L124 PetriNetUnfolderBase]: 1434/2334 cut-off events. [2023-08-26 18:30:54,494 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-08-26 18:30:54,498 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 11404 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 18:30:54,508 INFO L140 encePairwiseOnDemand]: 671/680 looper letters, 66 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-26 18:30:54,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 88 transitions, 405 flow [2023-08-26 18:30:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:30:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:30:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1553 transitions. [2023-08-26 18:30:54,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45676470588235296 [2023-08-26 18:30:54,513 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1553 transitions. [2023-08-26 18:30:54,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1553 transitions. [2023-08-26 18:30:54,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:54,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1553 transitions. [2023-08-26 18:30:54,516 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 18:30:54,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 680.0) internal successors, (4080), 6 states have internal predecessors, (4080), 0 states have call successors, (0), 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 18:30:54,521 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 680.0) internal successors, (4080), 6 states have internal predecessors, (4080), 0 states have call successors, (0), 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 18:30:54,521 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 159 flow. Second operand 5 states and 1553 transitions. [2023-08-26 18:30:54,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 88 transitions, 405 flow [2023-08-26 18:30:54,523 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 18:30:54,524 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 236 flow [2023-08-26 18:30:54,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:54,525 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2023-08-26 18:30:54,525 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 236 flow [2023-08-26 18:30:54,526 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 18:30:54,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:54,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:54,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:30:54,526 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 18:30:54,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash 883054506, now seen corresponding path program 1 times [2023-08-26 18:30:54,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586130166] [2023-08-26 18:30:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:54,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:54,594 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 18:30:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:54,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586130166] [2023-08-26 18:30:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586130166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:54,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:54,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:54,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21360025] [2023-08-26 18:30:54,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:54,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:54,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:54,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 680 [2023-08-26 18:30:54,598 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 18:30:54,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:54,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 680 [2023-08-26 18:30:54,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:54,888 INFO L124 PetriNetUnfolderBase]: 1570/2475 cut-off events. [2023-08-26 18:30:54,889 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-08-26 18:30:54,894 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 18:30:54,904 INFO L140 encePairwiseOnDemand]: 672/680 looper letters, 60 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-08-26 18:30:54,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 494 flow [2023-08-26 18:30:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 950 transitions. [2023-08-26 18:30:54,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2023-08-26 18:30:54,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 950 transitions. [2023-08-26 18:30:54,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 950 transitions. [2023-08-26 18:30:54,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:54,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 950 transitions. [2023-08-26 18:30:54,909 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 18:30:54,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:54,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:54,913 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 236 flow. Second operand 3 states and 950 transitions. [2023-08-26 18:30:54,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 494 flow [2023-08-26 18:30:54,916 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 18:30:54,917 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 371 flow [2023-08-26 18:30:54,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:54,918 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 13 predicate places. [2023-08-26 18:30:54,918 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 371 flow [2023-08-26 18:30:54,919 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 18:30:54,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:54,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:54,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:30:54,919 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 18:30:54,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:54,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1401921463, now seen corresponding path program 1 times [2023-08-26 18:30:54,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:54,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776323834] [2023-08-26 18:30:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:54,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:54,976 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 18:30:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776323834] [2023-08-26 18:30:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776323834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885857659] [2023-08-26 18:30:54,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:54,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:54,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 680 [2023-08-26 18:30:54,980 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 18:30:54,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:54,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 680 [2023-08-26 18:30:54,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:55,378 INFO L124 PetriNetUnfolderBase]: 2118/3500 cut-off events. [2023-08-26 18:30:55,378 INFO L125 PetriNetUnfolderBase]: For 4377/4435 co-relation queries the response was YES. [2023-08-26 18:30:55,386 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 18:30:55,400 INFO L140 encePairwiseOnDemand]: 676/680 looper letters, 76 selfloop transitions, 3 changer transitions 1/94 dead transitions. [2023-08-26 18:30:55,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 688 flow [2023-08-26 18:30:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-26 18:30:55,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2023-08-26 18:30:55,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-26 18:30:55,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-26 18:30:55,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:55,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-26 18:30:55,407 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 18:30:55,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:55,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:55,410 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 371 flow. Second operand 3 states and 984 transitions. [2023-08-26 18:30:55,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 688 flow [2023-08-26 18:30:55,424 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 18:30:55,426 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 379 flow [2023-08-26 18:30:55,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:55,427 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-26 18:30:55,427 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 379 flow [2023-08-26 18:30:55,427 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 18:30:55,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:55,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:55,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:30:55,428 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 18:30:55,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -225575348, now seen corresponding path program 1 times [2023-08-26 18:30:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:55,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962478956] [2023-08-26 18:30:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:55,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:55,522 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 18:30:55,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:55,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962478956] [2023-08-26 18:30:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962478956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:55,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356940438] [2023-08-26 18:30:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:55,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 680 [2023-08-26 18:30:55,526 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 18:30:55,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:55,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 680 [2023-08-26 18:30:55,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:56,038 INFO L124 PetriNetUnfolderBase]: 2901/4599 cut-off events. [2023-08-26 18:30:56,039 INFO L125 PetriNetUnfolderBase]: For 5695/5795 co-relation queries the response was YES. [2023-08-26 18:30:56,049 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 18:30:56,068 INFO L140 encePairwiseOnDemand]: 677/680 looper letters, 94 selfloop transitions, 4 changer transitions 1/107 dead transitions. [2023-08-26 18:30:56,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 107 transitions, 824 flow [2023-08-26 18:30:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 912 transitions. [2023-08-26 18:30:56,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2023-08-26 18:30:56,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 912 transitions. [2023-08-26 18:30:56,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 912 transitions. [2023-08-26 18:30:56,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:56,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 912 transitions. [2023-08-26 18:30:56,073 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 18:30:56,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:56,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:56,090 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 379 flow. Second operand 3 states and 912 transitions. [2023-08-26 18:30:56,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 107 transitions, 824 flow [2023-08-26 18:30:56,098 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 18:30:56,100 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 379 flow [2023-08-26 18:30:56,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:56,101 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2023-08-26 18:30:56,102 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 379 flow [2023-08-26 18:30:56,102 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 18:30:56,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:56,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:30:56,103 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 18:30:56,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -225575349, now seen corresponding path program 1 times [2023-08-26 18:30:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258058066] [2023-08-26 18:30:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:56,184 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 18:30:56,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:56,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258058066] [2023-08-26 18:30:56,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258058066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:56,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:56,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:56,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445930716] [2023-08-26 18:30:56,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:56,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 680 [2023-08-26 18:30:56,188 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 18:30:56,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:56,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 680 [2023-08-26 18:30:56,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:56,850 INFO L124 PetriNetUnfolderBase]: 3995/6091 cut-off events. [2023-08-26 18:30:56,850 INFO L125 PetriNetUnfolderBase]: For 8530/8654 co-relation queries the response was YES. [2023-08-26 18:30:56,866 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 18:30:56,889 INFO L140 encePairwiseOnDemand]: 675/680 looper letters, 96 selfloop transitions, 12 changer transitions 1/115 dead transitions. [2023-08-26 18:30:56,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 889 flow [2023-08-26 18:30:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 910 transitions. [2023-08-26 18:30:56,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2023-08-26 18:30:56,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 910 transitions. [2023-08-26 18:30:56,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 910 transitions. [2023-08-26 18:30:56,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:56,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 910 transitions. [2023-08-26 18:30:56,894 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 18:30:56,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:56,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:56,897 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 379 flow. Second operand 3 states and 910 transitions. [2023-08-26 18:30:56,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 889 flow [2023-08-26 18:30:56,913 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 18:30:56,915 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 511 flow [2023-08-26 18:30:56,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:56,916 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2023-08-26 18:30:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 511 flow [2023-08-26 18:30:56,916 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 18:30:56,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:56,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:30:56,917 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 18:30:56,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 404424984, now seen corresponding path program 1 times [2023-08-26 18:30:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529405996] [2023-08-26 18:30:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:56,979 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 18:30:56,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529405996] [2023-08-26 18:30:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529405996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:56,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:56,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:56,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174302451] [2023-08-26 18:30:56,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:56,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:56,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:56,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 680 [2023-08-26 18:30:56,983 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 18:30:56,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:56,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 680 [2023-08-26 18:30:56,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:57,143 INFO L124 PetriNetUnfolderBase]: 671/1253 cut-off events. [2023-08-26 18:30:57,143 INFO L125 PetriNetUnfolderBase]: For 1731/1731 co-relation queries the response was YES. [2023-08-26 18:30:57,147 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 18:30:57,151 INFO L140 encePairwiseOnDemand]: 673/680 looper letters, 41 selfloop transitions, 15 changer transitions 3/70 dead transitions. [2023-08-26 18:30:57,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 567 flow [2023-08-26 18:30:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:57,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-08-26 18:30:57,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-08-26 18:30:57,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-08-26 18:30:57,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-08-26 18:30:57,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:57,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-08-26 18:30:57,157 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 18:30:57,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,160 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 511 flow. Second operand 3 states and 930 transitions. [2023-08-26 18:30:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 567 flow [2023-08-26 18:30:57,165 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 18:30:57,166 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 383 flow [2023-08-26 18:30:57,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:57,167 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2023-08-26 18:30:57,167 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 383 flow [2023-08-26 18:30:57,168 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 18:30:57,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:57,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:57,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:30:57,168 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 18:30:57,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:57,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1597115224, now seen corresponding path program 1 times [2023-08-26 18:30:57,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:57,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785595931] [2023-08-26 18:30:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:57,243 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 18:30:57,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:57,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785595931] [2023-08-26 18:30:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785595931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:57,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:57,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981307327] [2023-08-26 18:30:57,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:57,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 680 [2023-08-26 18:30:57,247 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 18:30:57,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:57,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 680 [2023-08-26 18:30:57,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:57,384 INFO L124 PetriNetUnfolderBase]: 677/1228 cut-off events. [2023-08-26 18:30:57,384 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2023-08-26 18:30:57,387 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 18:30:57,391 INFO L140 encePairwiseOnDemand]: 678/680 looper letters, 42 selfloop transitions, 0 changer transitions 6/57 dead transitions. [2023-08-26 18:30:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 477 flow [2023-08-26 18:30:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 920 transitions. [2023-08-26 18:30:57,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-08-26 18:30:57,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 920 transitions. [2023-08-26 18:30:57,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 920 transitions. [2023-08-26 18:30:57,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:57,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 920 transitions. [2023-08-26 18:30:57,396 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 18:30:57,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,399 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 383 flow. Second operand 3 states and 920 transitions. [2023-08-26 18:30:57,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 477 flow [2023-08-26 18:30:57,403 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 18:30:57,403 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 310 flow [2023-08-26 18:30:57,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:57,405 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2023-08-26 18:30:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 310 flow [2023-08-26 18:30:57,406 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 18:30:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:30:57,406 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 18:30:57,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1477277207, now seen corresponding path program 1 times [2023-08-26 18:30:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405644418] [2023-08-26 18:30:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:57,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:57,512 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 18:30:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405644418] [2023-08-26 18:30:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405644418] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773460600] [2023-08-26 18:30:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 680 [2023-08-26 18:30:57,515 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 18:30:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:57,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 680 [2023-08-26 18:30:57,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:57,714 INFO L124 PetriNetUnfolderBase]: 1092/1755 cut-off events. [2023-08-26 18:30:57,714 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2023-08-26 18:30:57,719 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 18:30:57,725 INFO L140 encePairwiseOnDemand]: 677/680 looper letters, 41 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 18:30:57,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 450 flow [2023-08-26 18:30:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2023-08-26 18:30:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2023-08-26 18:30:57,728 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2023-08-26 18:30:57,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2023-08-26 18:30:57,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:57,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2023-08-26 18:30:57,732 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 18:30:57,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:57,736 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 310 flow. Second operand 3 states and 890 transitions. [2023-08-26 18:30:57,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 450 flow [2023-08-26 18:30:57,739 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 18:30:57,740 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 330 flow [2023-08-26 18:30:57,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:57,742 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-26 18:30:57,742 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 330 flow [2023-08-26 18:30:57,742 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 18:30:57,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:57,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:57,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:30:57,742 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 18:30:57,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1477277208, now seen corresponding path program 1 times [2023-08-26 18:30:57,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:57,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743600304] [2023-08-26 18:30:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:57,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:57,828 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 18:30:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743600304] [2023-08-26 18:30:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743600304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223107117] [2023-08-26 18:30:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:57,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:57,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:57,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 680 [2023-08-26 18:30:57,832 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 18:30:57,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:57,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 680 [2023-08-26 18:30:57,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:58,049 INFO L124 PetriNetUnfolderBase]: 1425/2163 cut-off events. [2023-08-26 18:30:58,049 INFO L125 PetriNetUnfolderBase]: For 1538/1538 co-relation queries the response was YES. [2023-08-26 18:30:58,055 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 18:30:58,064 INFO L140 encePairwiseOnDemand]: 677/680 looper letters, 44 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-26 18:30:58,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 480 flow [2023-08-26 18:30:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2023-08-26 18:30:58,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-08-26 18:30:58,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2023-08-26 18:30:58,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2023-08-26 18:30:58,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:58,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2023-08-26 18:30:58,069 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 18:30:58,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:58,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 680.0) internal successors, (2720), 4 states have internal predecessors, (2720), 0 states have call successors, (0), 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 18:30:58,072 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 330 flow. Second operand 3 states and 884 transitions. [2023-08-26 18:30:58,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 480 flow [2023-08-26 18:30:58,077 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 18:30:58,078 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 328 flow [2023-08-26 18:30:58,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:58,078 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-26 18:30:58,078 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 328 flow [2023-08-26 18:30:58,079 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 18:30:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:58,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:30:58,079 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 18:30:58,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1970965657, now seen corresponding path program 1 times [2023-08-26 18:30:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:58,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443991064] [2023-08-26 18:30:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:58,240 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 18:30:58,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:58,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443991064] [2023-08-26 18:30:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443991064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:58,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:58,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:30:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457728082] [2023-08-26 18:30:58,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:58,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:58,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 680 [2023-08-26 18:30:58,247 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 18:30:58,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:58,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 680 [2023-08-26 18:30:58,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:58,468 INFO L124 PetriNetUnfolderBase]: 1269/1927 cut-off events. [2023-08-26 18:30:58,468 INFO L125 PetriNetUnfolderBase]: For 1436/1436 co-relation queries the response was YES. [2023-08-26 18:30:58,472 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 18:30:58,477 INFO L140 encePairwiseOnDemand]: 675/680 looper letters, 39 selfloop transitions, 15 changer transitions 2/58 dead transitions. [2023-08-26 18:30:58,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 466 flow [2023-08-26 18:30:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1140 transitions. [2023-08-26 18:30:58,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41911764705882354 [2023-08-26 18:30:58,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1140 transitions. [2023-08-26 18:30:58,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1140 transitions. [2023-08-26 18:30:58,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:58,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1140 transitions. [2023-08-26 18:30:58,484 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 18:30:58,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:58,489 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:58,489 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 328 flow. Second operand 4 states and 1140 transitions. [2023-08-26 18:30:58,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 466 flow [2023-08-26 18:30:58,493 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 18:30:58,494 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-08-26 18:30:58,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:58,495 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-26 18:30:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-08-26 18:30:58,495 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 18:30:58,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:58,496 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 18:30:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:30:58,496 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 18:30:58,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 651986670, now seen corresponding path program 1 times [2023-08-26 18:30:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711238185] [2023-08-26 18:30:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:58,740 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 18:30:58,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:58,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711238185] [2023-08-26 18:30:58,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711238185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:58,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:58,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99861889] [2023-08-26 18:30:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:58,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 680 [2023-08-26 18:30:58,745 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 18:30:58,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:58,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 680 [2023-08-26 18:30:58,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:58,900 INFO L124 PetriNetUnfolderBase]: 882/1367 cut-off events. [2023-08-26 18:30:58,900 INFO L125 PetriNetUnfolderBase]: For 1130/1130 co-relation queries the response was YES. [2023-08-26 18:30:58,903 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 18:30:58,908 INFO L140 encePairwiseOnDemand]: 676/680 looper letters, 36 selfloop transitions, 14 changer transitions 2/54 dead transitions. [2023-08-26 18:30:58,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 440 flow [2023-08-26 18:30:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1144 transitions. [2023-08-26 18:30:58,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42058823529411765 [2023-08-26 18:30:58,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1144 transitions. [2023-08-26 18:30:58,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1144 transitions. [2023-08-26 18:30:58,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:58,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1144 transitions. [2023-08-26 18:30:58,914 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 18:30:58,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:58,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:58,918 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 4 states and 1144 transitions. [2023-08-26 18:30:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 440 flow [2023-08-26 18:30:58,921 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 18:30:58,922 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 289 flow [2023-08-26 18:30:58,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:58,923 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-26 18:30:58,923 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 289 flow [2023-08-26 18:30:58,923 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 18:30:58,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:58,923 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 18:30:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:30:58,924 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 18:30:58,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 309666166, now seen corresponding path program 1 times [2023-08-26 18:30:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239122555] [2023-08-26 18:30:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:59,101 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 18:30:59,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:59,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239122555] [2023-08-26 18:30:59,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239122555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:59,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:59,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895764634] [2023-08-26 18:30:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:59,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:59,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:59,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 680 [2023-08-26 18:30:59,104 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 18:30:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 680 [2023-08-26 18:30:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:59,344 INFO L124 PetriNetUnfolderBase]: 1161/1811 cut-off events. [2023-08-26 18:30:59,344 INFO L125 PetriNetUnfolderBase]: For 1499/1499 co-relation queries the response was YES. [2023-08-26 18:30:59,348 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 18:30:59,352 INFO L140 encePairwiseOnDemand]: 676/680 looper letters, 44 selfloop transitions, 7 changer transitions 34/87 dead transitions. [2023-08-26 18:30:59,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 87 transitions, 721 flow [2023-08-26 18:30:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1172 transitions. [2023-08-26 18:30:59,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308823529411765 [2023-08-26 18:30:59,356 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1172 transitions. [2023-08-26 18:30:59,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1172 transitions. [2023-08-26 18:30:59,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:59,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1172 transitions. [2023-08-26 18:30:59,359 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 18:30:59,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:59,362 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 680.0) internal successors, (3400), 5 states have internal predecessors, (3400), 0 states have call successors, (0), 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 18:30:59,363 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 289 flow. Second operand 4 states and 1172 transitions. [2023-08-26 18:30:59,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 87 transitions, 721 flow [2023-08-26 18:30:59,368 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 18:30:59,369 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 294 flow [2023-08-26 18:30:59,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:59,369 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-08-26 18:30:59,370 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 294 flow [2023-08-26 18:30:59,370 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 18:30:59,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:59,370 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 18:30:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:30:59,370 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 18:30:59,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 591668874, now seen corresponding path program 2 times [2023-08-26 18:30:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927819195] [2023-08-26 18:30:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:59,537 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 18:30:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:59,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927819195] [2023-08-26 18:30:59,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927819195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:59,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:59,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:30:59,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694664323] [2023-08-26 18:30:59,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:59,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:59,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:59,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 680 [2023-08-26 18:30:59,542 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 18:30:59,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:59,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 680 [2023-08-26 18:30:59,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:59,789 INFO L124 PetriNetUnfolderBase]: 834/1285 cut-off events. [2023-08-26 18:30:59,789 INFO L125 PetriNetUnfolderBase]: For 1235/1235 co-relation queries the response was YES. [2023-08-26 18:30:59,792 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 18:30:59,794 INFO L140 encePairwiseOnDemand]: 676/680 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-26 18:30:59,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 594 flow [2023-08-26 18:30:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:30:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:30:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1448 transitions. [2023-08-26 18:30:59,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258823529411765 [2023-08-26 18:30:59,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1448 transitions. [2023-08-26 18:30:59,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1448 transitions. [2023-08-26 18:30:59,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:59,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1448 transitions. [2023-08-26 18:30:59,802 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 18:30:59,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 680.0) internal successors, (4080), 6 states have internal predecessors, (4080), 0 states have call successors, (0), 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 18:30:59,808 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 680.0) internal successors, (4080), 6 states have internal predecessors, (4080), 0 states have call successors, (0), 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 18:30:59,808 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 294 flow. Second operand 5 states and 1448 transitions. [2023-08-26 18:30:59,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 594 flow [2023-08-26 18:30:59,812 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 18:30:59,812 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-26 18:30:59,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=680, 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 18:30:59,813 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2023-08-26 18:30:59,813 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-26 18:30:59,813 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 18:30:59,816 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 27 remaining) [2023-08-26 18:30:59,817 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (20 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONASSERT (18 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONASSERT (16 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONASSERT (15 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 27 remaining) [2023-08-26 18:30:59,818 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 27 remaining) [2023-08-26 18:30:59,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr7ASSERT_VIOLATIONASSERT (11 of 27 remaining) [2023-08-26 18:30:59,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_ath9kErr0ASSERT_VIOLATIONASSERT (10 of 27 remaining) [2023-08-26 18:30:59,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (9 of 27 remaining) [2023-08-26 18:30:59,819 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr6ASSERT_VIOLATIONASSERT (7 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 27 remaining) [2023-08-26 18:30:59,820 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 27 remaining) [2023-08-26 18:30:59,821 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONASSERT (1 of 27 remaining) [2023-08-26 18:30:59,821 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 27 remaining) [2023-08-26 18:30:59,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:30:59,821 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 18:30:59,823 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 (1/2) [2023-08-26 18:30:59,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 18:30:59,862 INFO L124 PetriNetUnfolderBase]: 41/361 cut-off events. [2023-08-26 18:30:59,862 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:30:59,864 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 18:30:59,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 352 transitions, 734 flow [2023-08-26 18:30:59,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 225 transitions, 467 flow [2023-08-26 18:30:59,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:30:59,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 225 transitions, 467 flow [2023-08-26 18:30:59,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 225 transitions, 467 flow [2023-08-26 18:30:59,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 225 transitions, 467 flow [2023-08-26 18:30:59,898 INFO L124 PetriNetUnfolderBase]: 38/328 cut-off events. [2023-08-26 18:30:59,898 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:30:59,900 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 18:30:59,906 INFO L119 LiptonReduction]: Number of co-enabled transitions 11560 [2023-08-26 18:31:05,744 INFO L134 LiptonReduction]: Checked pairs total: 18729 [2023-08-26 18:31:05,744 INFO L136 LiptonReduction]: Total number of compositions: 301 [2023-08-26 18:31:05,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:31:05,746 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;@6719f775, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:31:05,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-26 18:31:05,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:31:05,750 INFO L124 PetriNetUnfolderBase]: 9/48 cut-off events. [2023-08-26 18:31:05,750 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:31:05,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:05,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:05,751 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 18:31:05,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash -835871629, now seen corresponding path program 1 times [2023-08-26 18:31:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609105102] [2023-08-26 18:31:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:05,801 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 18:31:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:05,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609105102] [2023-08-26 18:31:05,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609105102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:05,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:05,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:31:05,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358259431] [2023-08-26 18:31:05,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:05,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:31:05,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:05,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:31:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:31:05,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 653 [2023-08-26 18:31:05,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 43 transitions, 103 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 18:31:05,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:05,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 653 [2023-08-26 18:31:05,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:05,881 INFO L124 PetriNetUnfolderBase]: 197/378 cut-off events. [2023-08-26 18:31:05,881 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 18:31:05,882 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 38. Compared 1679 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 18:31:05,882 INFO L140 encePairwiseOnDemand]: 643/653 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2023-08-26 18:31:05,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 185 flow [2023-08-26 18:31:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:31:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:31:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 933 transitions. [2023-08-26 18:31:05,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762633996937213 [2023-08-26 18:31:05,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 933 transitions. [2023-08-26 18:31:05,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 933 transitions. [2023-08-26 18:31:05,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:05,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 933 transitions. [2023-08-26 18:31:05,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 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 18:31:05,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 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 18:31:05,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 653.0) internal successors, (2612), 4 states have internal predecessors, (2612), 0 states have call successors, (0), 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 18:31:05,891 INFO L175 Difference]: Start difference. First operand has 40 places, 43 transitions, 103 flow. Second operand 3 states and 933 transitions. [2023-08-26 18:31:05,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 185 flow [2023-08-26 18:31:05,891 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 18:31:05,892 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 18:31:05,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=653, 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 18:31:05,892 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-08-26 18:31:05,892 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 18:31:05,893 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 18:31:05,893 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbThread1of1ForFork1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-26 18:31:05,893 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread_usbErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-26 18:31:05,893 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-26 18:31:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:31:05,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:31:05,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-26 18:31:05,895 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:31:05,895 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:31:05,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:31:05 BasicIcfg [2023-08-26 18:31:05,898 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:31:05,899 INFO L158 Benchmark]: Toolchain (without parser) took 23845.02ms. Allocated memory was 362.8MB in the beginning and 889.2MB in the end (delta: 526.4MB). Free memory was 335.4MB in the beginning and 677.1MB in the end (delta: -341.7MB). Peak memory consumption was 186.5MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,899 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 362.8MB. Free memory was 340.2MB in the beginning and 340.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:31:05,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 986.79ms. Allocated memory is still 362.8MB. Free memory was 335.4MB in the beginning and 278.0MB in the end (delta: 57.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,899 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.61ms. Allocated memory is still 362.8MB. Free memory was 278.0MB in the beginning and 274.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,900 INFO L158 Benchmark]: Boogie Preprocessor took 69.07ms. Allocated memory is still 362.8MB. Free memory was 274.6MB in the beginning and 271.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,900 INFO L158 Benchmark]: RCFGBuilder took 641.79ms. Allocated memory was 362.8MB in the beginning and 484.4MB in the end (delta: 121.6MB). Free memory was 271.7MB in the beginning and 448.7MB in the end (delta: -176.9MB). Peak memory consumption was 26.9MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,900 INFO L158 Benchmark]: TraceAbstraction took 22050.70ms. Allocated memory was 484.4MB in the beginning and 889.2MB in the end (delta: 404.8MB). Free memory was 448.7MB in the beginning and 677.1MB in the end (delta: -228.4MB). Peak memory consumption was 176.3MB. Max. memory is 16.0GB. [2023-08-26 18:31:05,901 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 362.8MB. Free memory was 340.2MB in the beginning and 340.1MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 986.79ms. Allocated memory is still 362.8MB. Free memory was 335.4MB in the beginning and 278.0MB in the end (delta: 57.4MB). Peak memory consumption was 56.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 89.61ms. Allocated memory is still 362.8MB. Free memory was 278.0MB in the beginning and 274.6MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 69.07ms. Allocated memory is still 362.8MB. Free memory was 274.6MB in the beginning and 271.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 641.79ms. Allocated memory was 362.8MB in the beginning and 484.4MB in the end (delta: 121.6MB). Free memory was 271.7MB in the beginning and 448.7MB in the end (delta: -176.9MB). Peak memory consumption was 26.9MB. Max. memory is 16.0GB. * TraceAbstraction took 22050.70ms. Allocated memory was 484.4MB in the beginning and 889.2MB in the end (delta: 404.8MB). Free memory was 448.7MB in the beginning and 677.1MB in the end (delta: -228.4MB). Peak memory consumption was 176.3MB. 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: 7.3s, 224 PlacesBefore, 48 PlacesAfterwards, 247 TransitionsBefore, 52 TransitionsAfterwards, 11662 CoEnabledTransitionPairs, 9 FixpointIterations, 86 TrivialSequentialCompositions, 162 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 55 ConcurrentYvCompositions, 19 ChoiceCompositions, 328 TotalNumberOfCompositions, 19533 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13941, independent: 13625, independent conditional: 0, independent unconditional: 13625, dependent: 316, dependent conditional: 0, dependent unconditional: 316, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 6932, independent: 6857, independent conditional: 0, independent unconditional: 6857, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13941, independent: 6768, independent conditional: 0, independent unconditional: 6768, dependent: 241, dependent conditional: 0, dependent unconditional: 241, unknown: 6932, unknown conditional: 0, unknown unconditional: 6932] , Statistics on independence cache: Total cache size (in pairs): 209, Positive cache size: 185, Positive conditional cache size: 0, Positive unconditional cache size: 185, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.9s, 205 PlacesBefore, 40 PlacesAfterwards, 225 TransitionsBefore, 43 TransitionsAfterwards, 11560 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 170 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 55 ConcurrentYvCompositions, 17 ChoiceCompositions, 301 TotalNumberOfCompositions, 18729 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13963, independent: 13739, independent conditional: 0, independent unconditional: 13739, dependent: 224, dependent conditional: 0, dependent unconditional: 224, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7134, independent: 7061, independent conditional: 0, independent unconditional: 7061, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13963, independent: 6678, independent conditional: 0, independent unconditional: 6678, dependent: 151, dependent conditional: 0, dependent unconditional: 151, unknown: 7134, unknown conditional: 0, unknown unconditional: 7134] , Statistics on independence cache: Total cache size (in pairs): 185, Positive cache size: 169, Positive conditional cache size: 0, Positive unconditional cache size: 169, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, 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 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: 15.8s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 1.3s 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, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 174 ConstructedInterpolants, 0 QuantifiedInterpolants, 734 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 - 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: 6.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s 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=103occurred 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, 0.0s 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 - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:31:05,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...