/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 16:03:18,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 16:03:18,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 16:03:18,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 16:03:18,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 16:03:18,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 16:03:18,162 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 16:03:18,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 16:03:18,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 16:03:18,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 16:03:18,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 16:03:18,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 16:03:18,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 16:03:18,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 16:03:18,182 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 16:03:18,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 16:03:18,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 16:03:18,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 16:03:18,183 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 16:03:18,183 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 16:03:18,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 16:03:18,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 16:03:18,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 16:03:18,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 16:03:18,191 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 16:03:18,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 16:03:18,192 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 16:03:18,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 16:03:18,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 16:03:18,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 16:03:18,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:03:18,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 16:03:18,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 16:03:18,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 16:03:18,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 16:03:18,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 16:03:18,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 16:03:18,194 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 16:03:18,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 16:03:18,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 16:03:18,195 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 16:03:18,195 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 16:03:18,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 16:03:18,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 16:03:18,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 16:03:18,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 16:03:18,398 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 16:03:18,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i [2023-08-03 16:03:19,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 16:03:19,745 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 16:03:19,746 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i [2023-08-03 16:03:19,757 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5502aa5/ff724167924b40c8a644a9669e4fa218/FLAG8463a178c [2023-08-03 16:03:19,768 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c5502aa5/ff724167924b40c8a644a9669e4fa218 [2023-08-03 16:03:19,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 16:03:19,771 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 16:03:19,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 16:03:19,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 16:03:19,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 16:03:19,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:03:19" (1/1) ... [2023-08-03 16:03:19,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632fe2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:19, skipping insertion in model container [2023-08-03 16:03:19,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 04:03:19" (1/1) ... [2023-08-03 16:03:19,821 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 16:03:19,980 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i[1098,1111] [2023-08-03 16:03:20,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:03:20,121 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 16:03:20,135 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i[1098,1111] [2023-08-03 16:03:20,146 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 16:03:20,147 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 16:03:20,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 16:03:20,186 INFO L206 MainTranslator]: Completed translation [2023-08-03 16:03:20,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20 WrapperNode [2023-08-03 16:03:20,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 16:03:20,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 16:03:20,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 16:03:20,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 16:03:20,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,220 INFO L138 Inliner]: procedures = 162, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-08-03 16:03:20,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 16:03:20,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 16:03:20,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 16:03:20,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 16:03:20,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,230 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,230 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,241 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 16:03:20,242 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 16:03:20,242 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 16:03:20,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 16:03:20,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (1/1) ... [2023-08-03 16:03:20,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 16:03:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:20,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 16:03:20,272 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 [2023-08-03 16:03:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 16:03:20,296 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 16:03:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 16:03:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 16:03:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 16:03:20,299 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 16:03:20,392 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 16:03:20,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 16:03:20,486 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 16:03:20,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 16:03:20,492 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 16:03:20,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:03:20 BoogieIcfgContainer [2023-08-03 16:03:20,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 16:03:20,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 16:03:20,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 16:03:20,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 16:03:20,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 04:03:19" (1/3) ... [2023-08-03 16:03:20,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43aa62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:03:20, skipping insertion in model container [2023-08-03 16:03:20,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 04:03:20" (2/3) ... [2023-08-03 16:03:20,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43aa62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 04:03:20, skipping insertion in model container [2023-08-03 16:03:20,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 04:03:20" (3/3) ... [2023-08-03 16:03:20,500 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_57-singlethreaded-unlock_true_bound2.i [2023-08-03 16:03:20,506 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 16:03:20,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 16:03:20,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 16:03:20,515 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 16:03:20,544 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:03:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 53 transitions, 111 flow [2023-08-03 16:03:20,603 INFO L124 PetriNetUnfolderBase]: 4/72 cut-off events. [2023-08-03 16:03:20,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:20,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 72 events. 4/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2023-08-03 16:03:20,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 53 transitions, 111 flow [2023-08-03 16:03:20,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 95 flow [2023-08-03 16:03:20,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:03:20,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 45 transitions, 95 flow [2023-08-03 16:03:20,623 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 45 transitions, 95 flow [2023-08-03 16:03:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 45 transitions, 95 flow [2023-08-03 16:03:20,636 INFO L124 PetriNetUnfolderBase]: 2/56 cut-off events. [2023-08-03 16:03:20,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:20,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 56 events. 2/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 35. Up to 4 conditions per place. [2023-08-03 16:03:20,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 102 [2023-08-03 16:03:22,166 INFO L134 LiptonReduction]: Checked pairs total: 75 [2023-08-03 16:03:22,166 INFO L136 LiptonReduction]: Total number of compositions: 39 [2023-08-03 16:03:22,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:03:22,189 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=true, 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;@613e8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:03:22,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 16:03:22,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:03:22,192 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-03 16:03:22,192 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:22,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:22,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-03 16:03:22,193 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:22,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 6171, now seen corresponding path program 1 times [2023-08-03 16:03:22,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36042672] [2023-08-03 16:03:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36042672] [2023-08-03 16:03:22,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36042672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:22,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:22,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:03:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874712806] [2023-08-03 16:03:22,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:03:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:22,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:03:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:03:22,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 92 [2023-08-03 16:03:22,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 10 places, 7 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:22,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 92 [2023-08-03 16:03:22,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:22,507 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-03 16:03:22,507 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:22,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 20. Up to 10 conditions per place. [2023-08-03 16:03:22,509 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 6 selfloop transitions, 2 changer transitions 0/9 dead transitions. [2023-08-03 16:03:22,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 9 transitions, 39 flow [2023-08-03 16:03:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:03:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:03:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-08-03 16:03:22,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-08-03 16:03:22,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-08-03 16:03:22,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-08-03 16:03:22,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:22,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-08-03 16:03:22,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,538 INFO L175 Difference]: Start difference. First operand has 10 places, 7 transitions, 19 flow. Second operand 3 states and 144 transitions. [2023-08-03 16:03:22,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 9 transitions, 39 flow [2023-08-03 16:03:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 9 transitions, 39 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:22,541 INFO L231 Difference]: Finished difference. Result has 13 places, 7 transitions, 27 flow [2023-08-03 16:03:22,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=27, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2023-08-03 16:03:22,545 INFO L281 CegarLoopForPetriNet]: 10 programPoint places, 3 predicate places. [2023-08-03 16:03:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 27 flow [2023-08-03 16:03:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:22,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 16:03:22,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 16:03:22,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:22,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 184024062, now seen corresponding path program 1 times [2023-08-03 16:03:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:22,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722994682] [2023-08-03 16:03:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722994682] [2023-08-03 16:03:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722994682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794526660] [2023-08-03 16:03:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:22,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:03:22,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 16:03:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:22,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:03:22,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:22,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794526660] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:22,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2023-08-03 16:03:22,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142612431] [2023-08-03 16:03:22,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:22,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:22,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:03:22,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 92 [2023-08-03 16:03:22,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 7 transitions, 27 flow. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:22,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 92 [2023-08-03 16:03:22,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:22,791 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-03 16:03:22,791 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 16:03:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 12 events. 2/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 2/14 useless extension candidates. Maximal degree in co-relation 18. Up to 6 conditions per place. [2023-08-03 16:03:22,791 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 5 selfloop transitions, 2 changer transitions 0/8 dead transitions. [2023-08-03 16:03:22,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 41 flow [2023-08-03 16:03:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:03:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:03:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2023-08-03 16:03:22,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 16:03:22,797 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 184 transitions. [2023-08-03 16:03:22,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 184 transitions. [2023-08-03 16:03:22,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:22,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 184 transitions. [2023-08-03 16:03:22,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,802 INFO L175 Difference]: Start difference. First operand has 13 places, 7 transitions, 27 flow. Second operand 4 states and 184 transitions. [2023-08-03 16:03:22,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 41 flow [2023-08-03 16:03:22,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:03:22,803 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 21 flow [2023-08-03 16:03:22,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-03 16:03:22,803 INFO L281 CegarLoopForPetriNet]: 10 programPoint places, 2 predicate places. [2023-08-03 16:03:22,806 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 21 flow [2023-08-03 16:03:22,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:22,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:22,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 16:03:22,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 16:03:23,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:23,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:23,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1409778811, now seen corresponding path program 1 times [2023-08-03 16:03:23,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:23,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518039633] [2023-08-03 16:03:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:03:23,039 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 16:03:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 16:03:23,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 16:03:23,081 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 16:03:23,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 16:03:23,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 16:03:23,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 16:03:23,087 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 16:03:23,090 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 16:03:23,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 16:03:23,113 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 16:03:23,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 57 transitions, 126 flow [2023-08-03 16:03:23,148 INFO L124 PetriNetUnfolderBase]: 6/100 cut-off events. [2023-08-03 16:03:23,148 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:03:23,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 100 events. 6/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 122 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2023-08-03 16:03:23,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 57 transitions, 126 flow [2023-08-03 16:03:23,150 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 49 transitions, 110 flow [2023-08-03 16:03:23,150 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 16:03:23,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 49 transitions, 110 flow [2023-08-03 16:03:23,150 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 49 transitions, 110 flow [2023-08-03 16:03:23,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 49 transitions, 110 flow [2023-08-03 16:03:23,170 INFO L124 PetriNetUnfolderBase]: 3/76 cut-off events. [2023-08-03 16:03:23,170 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 16:03:23,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 3/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2023-08-03 16:03:23,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 228 [2023-08-03 16:03:24,436 INFO L134 LiptonReduction]: Checked pairs total: 187 [2023-08-03 16:03:24,436 INFO L136 LiptonReduction]: Total number of compositions: 40 [2023-08-03 16:03:24,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 16:03:24,438 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=true, 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;@613e8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 16:03:24,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 16:03:24,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 16:03:24,439 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-03 16:03:24,439 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 16:03:24,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:24,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-03 16:03:24,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:24,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 9404, now seen corresponding path program 1 times [2023-08-03 16:03:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661228639] [2023-08-03 16:03:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:24,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:24,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661228639] [2023-08-03 16:03:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661228639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:24,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:03:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587154731] [2023-08-03 16:03:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:03:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:03:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:03:24,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 97 [2023-08-03 16:03:24,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 10 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:24,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 97 [2023-08-03 16:03:24,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:24,498 INFO L124 PetriNetUnfolderBase]: 17/48 cut-off events. [2023-08-03 16:03:24,498 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 16:03:24,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 48 events. 17/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 97 event pairs, 6 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 37. Up to 40 conditions per place. [2023-08-03 16:03:24,499 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 9 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-08-03 16:03:24,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 13 transitions, 60 flow [2023-08-03 16:03:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:03:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:03:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2023-08-03 16:03:24,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360824742268041 [2023-08-03 16:03:24,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2023-08-03 16:03:24,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2023-08-03 16:03:24,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:24,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2023-08-03 16:03:24,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,503 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,503 INFO L175 Difference]: Start difference. First operand has 15 places, 10 transitions, 32 flow. Second operand 3 states and 156 transitions. [2023-08-03 16:03:24,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 13 transitions, 60 flow [2023-08-03 16:03:24,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 58 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 16:03:24,504 INFO L231 Difference]: Finished difference. Result has 18 places, 11 transitions, 42 flow [2023-08-03 16:03:24,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=18, PETRI_TRANSITIONS=11} [2023-08-03 16:03:24,505 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 3 predicate places. [2023-08-03 16:03:24,505 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 11 transitions, 42 flow [2023-08-03 16:03:24,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:24,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 16:03:24,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 16:03:24,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:24,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash 103558169, now seen corresponding path program 1 times [2023-08-03 16:03:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563741730] [2023-08-03 16:03:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:24,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:24,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563741730] [2023-08-03 16:03:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563741730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:24,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369454899] [2023-08-03 16:03:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:24,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:24,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:24,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:03:24,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 16:03:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:24,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 16:03:24,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:24,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 16:03:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:24,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369454899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 16:03:24,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 16:03:24,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2023-08-03 16:03:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123926073] [2023-08-03 16:03:24,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 16:03:24,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:24,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 16:03:24,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 97 [2023-08-03 16:03:24,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 11 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:24,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 97 [2023-08-03 16:03:24,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:24,691 INFO L124 PetriNetUnfolderBase]: 16/45 cut-off events. [2023-08-03 16:03:24,691 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 16:03:24,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 45 events. 16/45 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 91 event pairs, 2 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 54. Up to 20 conditions per place. [2023-08-03 16:03:24,693 INFO L140 encePairwiseOnDemand]: 93/97 looper letters, 10 selfloop transitions, 4 changer transitions 0/16 dead transitions. [2023-08-03 16:03:24,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 16 transitions, 80 flow [2023-08-03 16:03:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 16:03:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 16:03:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2023-08-03 16:03:24,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231958762886598 [2023-08-03 16:03:24,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 203 transitions. [2023-08-03 16:03:24,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 203 transitions. [2023-08-03 16:03:24,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:24,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 203 transitions. [2023-08-03 16:03:24,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,703 INFO L175 Difference]: Start difference. First operand has 18 places, 11 transitions, 42 flow. Second operand 4 states and 203 transitions. [2023-08-03 16:03:24,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 16 transitions, 80 flow [2023-08-03 16:03:24,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 16 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 16:03:24,704 INFO L231 Difference]: Finished difference. Result has 22 places, 12 transitions, 60 flow [2023-08-03 16:03:24,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=12} [2023-08-03 16:03:24,706 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 7 predicate places. [2023-08-03 16:03:24,706 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 12 transitions, 60 flow [2023-08-03 16:03:24,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:24,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2023-08-03 16:03:24,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 16:03:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:24,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:24,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2115744085, now seen corresponding path program 1 times [2023-08-03 16:03:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847456039] [2023-08-03 16:03:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 16:03:24,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847456039] [2023-08-03 16:03:24,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847456039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:24,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 16:03:24,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 16:03:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836051919] [2023-08-03 16:03:24,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 16:03:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 16:03:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 16:03:24,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 97 [2023-08-03 16:03:24,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 12 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:24,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:24,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 97 [2023-08-03 16:03:24,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:24,999 INFO L124 PetriNetUnfolderBase]: 12/39 cut-off events. [2023-08-03 16:03:24,999 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-03 16:03:25,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 39 events. 12/39 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 12 based on Foata normal form. 4/42 useless extension candidates. Maximal degree in co-relation 42. Up to 32 conditions per place. [2023-08-03 16:03:25,000 INFO L140 encePairwiseOnDemand]: 95/97 looper letters, 8 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-03 16:03:25,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 11 transitions, 72 flow [2023-08-03 16:03:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 16:03:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 16:03:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-08-03 16:03:25,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5326460481099656 [2023-08-03 16:03:25,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-08-03 16:03:25,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-08-03 16:03:25,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:25,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-08-03 16:03:25,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,004 INFO L175 Difference]: Start difference. First operand has 22 places, 12 transitions, 60 flow. Second operand 3 states and 155 transitions. [2023-08-03 16:03:25,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 11 transitions, 72 flow [2023-08-03 16:03:25,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 63 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 16:03:25,006 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 47 flow [2023-08-03 16:03:25,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2023-08-03 16:03:25,006 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 5 predicate places. [2023-08-03 16:03:25,007 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 47 flow [2023-08-03 16:03:25,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 16:03:25,007 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 16:03:25,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 16:03:25,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 16:03:25,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 16:03:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1163557479, now seen corresponding path program 1 times [2023-08-03 16:03:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 16:03:25,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010335068] [2023-08-03 16:03:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 16:03:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:25,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 16:03:25,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010335068] [2023-08-03 16:03:25,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010335068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 16:03:25,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172978509] [2023-08-03 16:03:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 16:03:25,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:25,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 16:03:25,060 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 16:03:25,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 16:03:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 16:03:25,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 16:03:25,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 16:03:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 16:03:25,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 16:03:25,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172978509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 16:03:25,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 16:03:25,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 16:03:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026973244] [2023-08-03 16:03:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 16:03:25,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 16:03:25,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 16:03:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 16:03:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 16:03:25,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 97 [2023-08-03 16:03:25,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 16:03:25,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 97 [2023-08-03 16:03:25,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 16:03:25,187 INFO L124 PetriNetUnfolderBase]: 8/27 cut-off events. [2023-08-03 16:03:25,187 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 16:03:25,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 27 events. 8/27 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 4/30 useless extension candidates. Maximal degree in co-relation 66. Up to 12 conditions per place. [2023-08-03 16:03:25,187 INFO L140 encePairwiseOnDemand]: 94/97 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-03 16:03:25,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 13 transitions, 72 flow [2023-08-03 16:03:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 16:03:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 16:03:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 248 transitions. [2023-08-03 16:03:25,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511340206185567 [2023-08-03 16:03:25,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 248 transitions. [2023-08-03 16:03:25,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 248 transitions. [2023-08-03 16:03:25,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 16:03:25,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 248 transitions. [2023-08-03 16:03:25,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.6) internal successors, (248), 5 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,191 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,191 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 47 flow. Second operand 5 states and 248 transitions. [2023-08-03 16:03:25,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 13 transitions, 72 flow [2023-08-03 16:03:25,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 16:03:25,192 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-03 16:03:25,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-03 16:03:25,193 INFO L281 CegarLoopForPetriNet]: 15 programPoint places, 5 predicate places. [2023-08-03 16:03:25,193 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-03 16:03:25,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 16:03:25,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 16:03:25,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 16:03:25,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 16:03:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 16:03:25,399 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 16:03:25,401 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 16:03:25,401 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 16:03:25,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 04:03:25 BasicIcfg [2023-08-03 16:03:25,404 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 16:03:25,405 INFO L158 Benchmark]: Toolchain (without parser) took 5633.93ms. Allocated memory is still 528.5MB. Free memory was 480.0MB in the beginning and 312.7MB in the end (delta: 167.3MB). Peak memory consumption was 170.2MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,405 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory was 305.7MB in the beginning and 305.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 16:03:25,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.83ms. Allocated memory is still 528.5MB. Free memory was 480.0MB in the beginning and 461.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,405 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.88ms. Allocated memory is still 528.5MB. Free memory was 461.1MB in the beginning and 459.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,406 INFO L158 Benchmark]: Boogie Preprocessor took 20.12ms. Allocated memory is still 528.5MB. Free memory was 459.1MB in the beginning and 457.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,406 INFO L158 Benchmark]: RCFGBuilder took 251.84ms. Allocated memory is still 528.5MB. Free memory was 457.7MB in the beginning and 445.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,406 INFO L158 Benchmark]: TraceAbstraction took 4909.28ms. Allocated memory is still 528.5MB. Free memory was 445.1MB in the beginning and 312.7MB in the end (delta: 132.4MB). Peak memory consumption was 136.6MB. Max. memory is 16.0GB. [2023-08-03 16:03:25,408 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory was 305.7MB in the beginning and 305.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 413.83ms. Allocated memory is still 528.5MB. Free memory was 480.0MB in the beginning and 461.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.88ms. Allocated memory is still 528.5MB. Free memory was 461.1MB in the beginning and 459.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 20.12ms. Allocated memory is still 528.5MB. Free memory was 459.1MB in the beginning and 457.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 251.84ms. Allocated memory is still 528.5MB. Free memory was 457.7MB in the beginning and 445.8MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 4909.28ms. Allocated memory is still 528.5MB. Free memory was 445.1MB in the beginning and 312.7MB in the end (delta: 132.4MB). Peak memory consumption was 136.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 47 PlacesBefore, 10 PlacesAfterwards, 45 TransitionsBefore, 7 TransitionsAfterwards, 102 CoEnabledTransitionPairs, 5 FixpointIterations, 23 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 39 TotalNumberOfCompositions, 75 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 75, independent: 75, independent conditional: 0, independent unconditional: 75, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 48, independent: 48, independent conditional: 0, independent unconditional: 48, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 75, independent: 27, independent conditional: 0, independent unconditional: 27, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 48, unknown conditional: 0, unknown unconditional: 48] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 53 PlacesBefore, 15 PlacesAfterwards, 49 TransitionsBefore, 10 TransitionsAfterwards, 228 CoEnabledTransitionPairs, 5 FixpointIterations, 23 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 40 TotalNumberOfCompositions, 187 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 187, independent: 187, independent conditional: 0, independent unconditional: 187, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 106, independent: 106, independent conditional: 0, independent unconditional: 106, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 187, independent: 81, independent conditional: 0, independent unconditional: 81, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 106, unknown conditional: 0, unknown unconditional: 106] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 56 locations, 2 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: 2.5s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44 IncrementalHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 0 mSDtfsCounter, 44 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=1, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 39 SizeOfPredicates, 0 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 60 locations, 2 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: 2.3s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108 IncrementalHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 6 mSDtfsCounter, 108 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=2, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 131 SizeOfPredicates, 0 NumberOfNonLiveVariables, 191 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 17/25 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 16:03:25,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...