/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_01-simple_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:23:33,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:23:33,926 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:23:33,930 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:23:33,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:23:33,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:23:33,931 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:23:33,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:23:33,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:23:33,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:23:33,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:23:33,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:23:33,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:23:33,970 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:23:33,970 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:23:33,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:23:33,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:23:33,970 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:23:33,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:23:33,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:23:33,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:23:33,971 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:23:33,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:23:33,972 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:23:33,972 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:23:33,972 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:23:33,972 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:23:33,973 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:23:33,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:23:33,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:23:33,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:33,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:23:33,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:23:33,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:23:33,975 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:23:33,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:23:34,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:23:34,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:23:34,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:23:34,198 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:23:34,198 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:23:34,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_01-simple_racing_bound2.i [2023-08-03 21:23:35,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:23:35,570 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:23:35,571 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_01-simple_racing_bound2.i [2023-08-03 21:23:35,583 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529804b26/0a54c49d4d62466081d14584e943f094/FLAGb58b3833c [2023-08-03 21:23:35,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529804b26/0a54c49d4d62466081d14584e943f094 [2023-08-03 21:23:35,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:23:35,598 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:23:35,599 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:35,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:23:35,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:23:35,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:35" (1/1) ... [2023-08-03 21:23:35,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1332a68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:35, skipping insertion in model container [2023-08-03 21:23:35,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:35" (1/1) ... [2023-08-03 21:23:35,648 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:23:35,952 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_01-simple_racing_bound2.i[30176,30189] [2023-08-03 21:23:35,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:35,987 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:23:36,013 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:23:36,015 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:23:36,029 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_01-simple_racing_bound2.i[30176,30189] [2023-08-03 21:23:36,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:36,088 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:23:36,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36 WrapperNode [2023-08-03 21:23:36,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:36,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:36,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:23:36,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:23:36,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,147 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-08-03 21:23:36,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:36,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:23:36,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:23:36,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:23:36,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,167 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,193 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:23:36,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:23:36,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:23:36,194 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:23:36,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:36,234 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 21:23:36,266 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 21:23:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:23:36,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:23:36,279 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:23:36,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:23:36,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:23:36,279 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:23:36,279 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:23:36,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:23:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:23:36,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:23:36,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:23:36,282 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 21:23:36,418 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:23:36,420 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:23:36,592 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:23:36,598 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:23:36,598 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 21:23:36,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:36 BoogieIcfgContainer [2023-08-03 21:23:36,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:23:36,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:23:36,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:23:36,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:23:36,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:23:35" (1/3) ... [2023-08-03 21:23:36,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b82ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:36, skipping insertion in model container [2023-08-03 21:23:36,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36" (2/3) ... [2023-08-03 21:23:36,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b82ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:36, skipping insertion in model container [2023-08-03 21:23:36,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:36" (3/3) ... [2023-08-03 21:23:36,607 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_01-simple_racing_bound2.i [2023-08-03 21:23:36,614 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:23:36,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:23:36,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:23:36,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:23:36,689 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:23:36,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 106 transitions, 220 flow [2023-08-03 21:23:36,760 INFO L124 PetriNetUnfolderBase]: 17/139 cut-off events. [2023-08-03 21:23:36,760 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:23:36,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 139 events. 17/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-03 21:23:36,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 106 transitions, 220 flow [2023-08-03 21:23:36,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 101 transitions, 207 flow [2023-08-03 21:23:36,773 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:36,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-03 21:23:36,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 101 transitions, 207 flow [2023-08-03 21:23:36,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 101 transitions, 207 flow [2023-08-03 21:23:36,807 INFO L124 PetriNetUnfolderBase]: 16/134 cut-off events. [2023-08-03 21:23:36,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:36,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 16/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 288 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2023-08-03 21:23:36,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-03 21:23:39,516 INFO L134 LiptonReduction]: Checked pairs total: 3727 [2023-08-03 21:23:39,516 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-03 21:23:39,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:39,533 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;@7c9cd465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:39,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:39,539 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:39,539 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-08-03 21:23:39,539 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:39,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:39,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:23:39,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:39,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:39,545 INFO L85 PathProgramCache]: Analyzing trace with hash -923603211, now seen corresponding path program 1 times [2023-08-03 21:23:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526032187] [2023-08-03 21:23:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:39,655 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:23:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:39,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:23:39,695 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:23:39,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:23:39,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:23:39,698 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:23:39,700 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:23:39,701 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:23:39,701 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:23:39,719 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:23:39,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,756 INFO L124 PetriNetUnfolderBase]: 31/226 cut-off events. [2023-08-03 21:23:39,756 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:39,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-03 21:23:39,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:39,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,760 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:39,785 INFO L124 PetriNetUnfolderBase]: 31/226 cut-off events. [2023-08-03 21:23:39,785 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:39,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-03 21:23:39,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-03 21:23:42,518 INFO L134 LiptonReduction]: Checked pairs total: 17341 [2023-08-03 21:23:42,518 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 21:23:42,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:42,521 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;@7c9cd465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:42,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:42,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:42,528 INFO L124 PetriNetUnfolderBase]: 12/60 cut-off events. [2023-08-03 21:23:42,528 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:23:42,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:42,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:23:42,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:42,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash 358027829, now seen corresponding path program 1 times [2023-08-03 21:23:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:42,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217537787] [2023-08-03 21:23:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:42,723 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 21:23:42,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217537787] [2023-08-03 21:23:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217537787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:23:42,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133789142] [2023-08-03 21:23:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:42,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:42,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:42,727 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 21:23:42,728 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 21:23:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:42,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:23:42,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:23:42,844 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 21:23:42,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:23:42,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133789142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:42,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:23:42,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:23:42,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708508620] [2023-08-03 21:23:42,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:42,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:23:42,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 231 [2023-08-03 21:23:42,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 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 21:23:42,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:42,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 231 [2023-08-03 21:23:42,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:43,164 INFO L124 PetriNetUnfolderBase]: 1267/2151 cut-off events. [2023-08-03 21:23:43,164 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-03 21:23:43,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4295 conditions, 2151 events. 1267/2151 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13385 event pairs, 50 based on Foata normal form. 538/2455 useless extension candidates. Maximal degree in co-relation 2184. Up to 1947 conditions per place. [2023-08-03 21:23:43,171 INFO L140 encePairwiseOnDemand]: 212/231 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-03 21:23:43,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 254 flow [2023-08-03 21:23:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:23:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:23:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-03 21:23:43,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489177489177489 [2023-08-03 21:23:43,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-03 21:23:43,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-03 21:23:43,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:43,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-03 21:23:43,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 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 21:23:43,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 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 21:23:43,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 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 21:23:43,199 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 5 states and 634 transitions. [2023-08-03 21:23:43,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 254 flow [2023-08-03 21:23:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 65 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:23:43,204 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-03 21:23:43,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-03 21:23:43,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-03 21:23:43,209 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-03 21:23:43,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 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 21:23:43,210 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:23:43,219 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 21:23:43,415 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 21:23:43,416 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:23:43,416 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:23:43,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,438 INFO L124 PetriNetUnfolderBase]: 31/226 cut-off events. [2023-08-03 21:23:43,438 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:43,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-03 21:23:43,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:43,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 136 transitions, 290 flow [2023-08-03 21:23:43,464 INFO L124 PetriNetUnfolderBase]: 31/226 cut-off events. [2023-08-03 21:23:43,464 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:43,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 226 events. 31/226 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-08-03 21:23:43,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-03 21:23:45,959 INFO L134 LiptonReduction]: Checked pairs total: 15492 [2023-08-03 21:23:45,959 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 21:23:45,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:23:45,962 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;@7c9cd465, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:45,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:45,964 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:45,964 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 21:23:45,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:45,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:45,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:23:45,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:45,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash 23412947, now seen corresponding path program 1 times [2023-08-03 21:23:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:45,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074299900] [2023-08-03 21:23:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:45,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,043 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 21:23:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:46,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074299900] [2023-08-03 21:23:46,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074299900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:46,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:46,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:23:46,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55921801] [2023-08-03 21:23:46,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:23:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:23:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:23:46,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 231 [2023-08-03 21:23:46,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 21:23:46,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:46,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 231 [2023-08-03 21:23:46,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:46,250 INFO L124 PetriNetUnfolderBase]: 1376/2456 cut-off events. [2023-08-03 21:23:46,251 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-03 21:23:46,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2456 events. 1376/2456 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14719 event pairs, 648 based on Foata normal form. 555/2693 useless extension candidates. Maximal degree in co-relation 639. Up to 2257 conditions per place. [2023-08-03 21:23:46,259 INFO L140 encePairwiseOnDemand]: 213/231 looper letters, 28 selfloop transitions, 2 changer transitions 11/50 dead transitions. [2023-08-03 21:23:46,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-08-03 21:23:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:23:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:23:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2023-08-03 21:23:46,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642135642135642 [2023-08-03 21:23:46,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2023-08-03 21:23:46,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2023-08-03 21:23:46,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:46,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2023-08-03 21:23:46,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 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 21:23:46,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 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 21:23:46,266 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 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 21:23:46,266 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 391 transitions. [2023-08-03 21:23:46,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-08-03 21:23:46,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:23:46,269 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-03 21:23:46,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-03 21:23:46,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-03 21:23:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-03 21:23:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 21:23:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:46,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:46,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:23:46,271 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:46,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1600246011, now seen corresponding path program 1 times [2023-08-03 21:23:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:46,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575136995] [2023-08-03 21:23:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,369 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 21:23:46,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575136995] [2023-08-03 21:23:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575136995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:23:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033287681] [2023-08-03 21:23:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:46,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:46,373 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 21:23:46,401 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 21:23:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:23:46,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:23:46,470 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 21:23:46,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:23:46,482 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 21:23:46,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033287681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:23:46,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:23:46,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:23:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777474722] [2023-08-03 21:23:46,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:23:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:46,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:23:46,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 231 [2023-08-03 21:23:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 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 21:23:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 231 [2023-08-03 21:23:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:46,646 INFO L124 PetriNetUnfolderBase]: 616/1100 cut-off events. [2023-08-03 21:23:46,646 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-08-03 21:23:46,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1100 events. 616/1100 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5796 event pairs, 154 based on Foata normal form. 7/1107 useless extension candidates. Maximal degree in co-relation 336. Up to 693 conditions per place. [2023-08-03 21:23:46,652 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 41 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2023-08-03 21:23:46,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 216 flow [2023-08-03 21:23:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:23:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:23:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-03 21:23:46,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216450216450217 [2023-08-03 21:23:46,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-03 21:23:46,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-03 21:23:46,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:46,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-03 21:23:46,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 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 21:23:46,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 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 21:23:46,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 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 21:23:46,666 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 4 states and 482 transitions. [2023-08-03 21:23:46,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 216 flow [2023-08-03 21:23:46,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:23:46,668 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-03 21:23:46,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-03 21:23:46,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-03 21:23:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-03 21:23:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.2) internal successors, (556), 5 states have internal predecessors, (556), 0 states have call successors, (0), 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 21:23:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:46,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:46,678 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 21:23:46,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 21:23:46,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:46,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:46,871 INFO L85 PathProgramCache]: Analyzing trace with hash 36015318, now seen corresponding path program 1 times [2023-08-03 21:23:46,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:46,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012901103] [2023-08-03 21:23:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:46,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:46,967 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 21:23:46,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:46,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012901103] [2023-08-03 21:23:46,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012901103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:46,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:46,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:23:46,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038422747] [2023-08-03 21:23:46,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:46,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:23:46,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:23:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:23:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 231 [2023-08-03 21:23:46,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 21:23:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 231 [2023-08-03 21:23:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:47,072 INFO L124 PetriNetUnfolderBase]: 646/1150 cut-off events. [2023-08-03 21:23:47,072 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2023-08-03 21:23:47,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 1150 events. 646/1150 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5652 event pairs, 262 based on Foata normal form. 9/1152 useless extension candidates. Maximal degree in co-relation 1952. Up to 979 conditions per place. [2023-08-03 21:23:47,078 INFO L140 encePairwiseOnDemand]: 227/231 looper letters, 34 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-03 21:23:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 214 flow [2023-08-03 21:23:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:23:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:23:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-03 21:23:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-03 21:23:47,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-03 21:23:47,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-03 21:23:47,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:47,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-03 21:23:47,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 21:23:47,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 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 21:23:47,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 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 21:23:47,082 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 3 states and 363 transitions. [2023-08-03 21:23:47,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 214 flow [2023-08-03 21:23:47,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 202 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:23:47,084 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 106 flow [2023-08-03 21:23:47,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-03 21:23:47,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-03 21:23:47,085 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 106 flow [2023-08-03 21:23:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 21:23:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:47,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:23:47,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:47,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -14319894, now seen corresponding path program 1 times [2023-08-03 21:23:47,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:47,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144067678] [2023-08-03 21:23:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:23:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:47,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144067678] [2023-08-03 21:23:47,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144067678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:47,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:23:47,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801767571] [2023-08-03 21:23:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:47,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:23:47,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 231 [2023-08-03 21:23:47,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 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 21:23:47,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:47,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 231 [2023-08-03 21:23:47,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:47,396 INFO L124 PetriNetUnfolderBase]: 341/754 cut-off events. [2023-08-03 21:23:47,396 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2023-08-03 21:23:47,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 754 events. 341/754 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3742 event pairs, 148 based on Foata normal form. 135/887 useless extension candidates. Maximal degree in co-relation 984. Up to 369 conditions per place. [2023-08-03 21:23:47,400 INFO L140 encePairwiseOnDemand]: 219/231 looper letters, 34 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2023-08-03 21:23:47,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 257 flow [2023-08-03 21:23:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:23:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:23:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2023-08-03 21:23:47,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2023-08-03 21:23:47,401 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 444 transitions. [2023-08-03 21:23:47,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 444 transitions. [2023-08-03 21:23:47,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:47,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 444 transitions. [2023-08-03 21:23:47,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 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 21:23:47,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 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 21:23:47,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 231.0) internal successors, (1155), 5 states have internal predecessors, (1155), 0 states have call successors, (0), 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 21:23:47,406 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 106 flow. Second operand 4 states and 444 transitions. [2023-08-03 21:23:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 257 flow [2023-08-03 21:23:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:23:47,408 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 162 flow [2023-08-03 21:23:47,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-03 21:23:47,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-03 21:23:47,410 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 162 flow [2023-08-03 21:23:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 0 states have call successors, (0), 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 21:23:47,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:47,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:47,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:23:47,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:47,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:47,412 INFO L85 PathProgramCache]: Analyzing trace with hash 208041787, now seen corresponding path program 1 times [2023-08-03 21:23:47,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:47,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694978045] [2023-08-03 21:23:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:47,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:23:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:47,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:23:47,457 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:23:47,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 21:23:47,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:23:47,457 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-03 21:23:47,458 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-03 21:23:47,460 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:23:47,460 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:23:47,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:23:47 BasicIcfg [2023-08-03 21:23:47,508 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:23:47,509 INFO L158 Benchmark]: Toolchain (without parser) took 11910.97ms. Allocated memory was 318.8MB in the beginning and 474.0MB in the end (delta: 155.2MB). Free memory was 268.5MB in the beginning and 228.1MB in the end (delta: 40.4MB). Peak memory consumption was 196.9MB. Max. memory is 16.0GB. [2023-08-03 21:23:47,509 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory was 207.2MB in the beginning and 207.0MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:23:47,509 INFO L158 Benchmark]: CACSL2BoogieTranslator took 491.12ms. Allocated memory is still 318.8MB. Free memory was 268.2MB in the beginning and 248.3MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 21:23:47,509 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.94ms. Allocated memory is still 318.8MB. Free memory was 248.3MB in the beginning and 246.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:23:47,509 INFO L158 Benchmark]: Boogie Preprocessor took 44.47ms. Allocated memory is still 318.8MB. Free memory was 246.3MB in the beginning and 244.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:23:47,510 INFO L158 Benchmark]: RCFGBuilder took 406.82ms. Allocated memory is still 318.8MB. Free memory was 244.7MB in the beginning and 280.0MB in the end (delta: -35.3MB). Peak memory consumption was 18.6MB. Max. memory is 16.0GB. [2023-08-03 21:23:47,510 INFO L158 Benchmark]: TraceAbstraction took 10906.26ms. Allocated memory was 318.8MB in the beginning and 474.0MB in the end (delta: 155.2MB). Free memory was 279.3MB in the beginning and 228.1MB in the end (delta: 51.1MB). Peak memory consumption was 205.7MB. Max. memory is 16.0GB. [2023-08-03 21:23:47,512 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory was 207.2MB in the beginning and 207.0MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 491.12ms. Allocated memory is still 318.8MB. Free memory was 268.2MB in the beginning and 248.3MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.94ms. Allocated memory is still 318.8MB. Free memory was 248.3MB in the beginning and 246.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.47ms. Allocated memory is still 318.8MB. Free memory was 246.3MB in the beginning and 244.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 406.82ms. Allocated memory is still 318.8MB. Free memory was 244.7MB in the beginning and 280.0MB in the end (delta: -35.3MB). Peak memory consumption was 18.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10906.26ms. Allocated memory was 318.8MB in the beginning and 474.0MB in the end (delta: 155.2MB). Free memory was 279.3MB in the beginning and 228.1MB in the end (delta: 51.1MB). Peak memory consumption was 205.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 93 PlacesBefore, 26 PlacesAfterwards, 101 TransitionsBefore, 32 TransitionsAfterwards, 2184 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 2 ChoiceCompositions, 81 TotalNumberOfCompositions, 3727 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2432, independent: 2304, independent conditional: 0, independent unconditional: 2304, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1181, independent: 1154, independent conditional: 0, independent unconditional: 1154, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2432, independent: 1150, independent conditional: 0, independent unconditional: 1150, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 1181, unknown conditional: 0, unknown unconditional: 1181] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 79, Positive conditional cache size: 0, Positive unconditional cache size: 79, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 122 PlacesBefore, 45 PlacesAfterwards, 136 TransitionsBefore, 57 TransitionsAfterwards, 6552 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 2 ChoiceCompositions, 95 TotalNumberOfCompositions, 17341 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8145, independent: 7841, independent conditional: 0, independent unconditional: 7841, dependent: 304, dependent conditional: 0, dependent unconditional: 304, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3145, independent: 3096, independent conditional: 0, independent unconditional: 3096, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8145, independent: 4745, independent conditional: 0, independent unconditional: 4745, dependent: 255, dependent conditional: 0, dependent unconditional: 255, unknown: 3145, unknown conditional: 0, unknown unconditional: 3145] , Statistics on independence cache: Total cache size (in pairs): 296, Positive cache size: 272, Positive conditional cache size: 0, Positive unconditional cache size: 272, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 122 PlacesBefore, 45 PlacesAfterwards, 136 TransitionsBefore, 57 TransitionsAfterwards, 6552 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 2 ChoiceCompositions, 95 TotalNumberOfCompositions, 15492 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7724, independent: 7462, independent conditional: 0, independent unconditional: 7462, dependent: 262, dependent conditional: 0, dependent unconditional: 262, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3181, independent: 3132, independent conditional: 0, independent unconditional: 3132, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7724, independent: 4330, independent conditional: 0, independent unconditional: 4330, dependent: 213, dependent conditional: 0, dependent unconditional: 213, unknown: 3181, unknown conditional: 0, unknown unconditional: 3181] , Statistics on independence cache: Total cache size (in pairs): 335, Positive cache size: 311, Positive conditional cache size: 0, Positive unconditional cache size: 311, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 691]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L696] 0 pthread_mutex_t __global_lock = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L697] 0 int global = 0; [L698] 0 pthread_mutex_t mutex1 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L699] 0 pthread_mutex_t mutex2 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L707] 0 pthread_t t_ids[2]; [L707] 0 int i=0; VAL [__global_lock={3:0}, global=0, i=0, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L707] COND TRUE 0 i<2 [L707] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, global=0, i=0, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-2, t_ids={6:0}] [L707] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, global=0, i=1, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L707] COND TRUE 0 i<2 [L702] 1 (global)++ [L707] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=1, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-1, t_ids={6:0}] [L707] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=2, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L707] COND FALSE 0 !(i<2) [L709] CALL 0 __VERIFIER_assert((global) == 0) [L691] COND TRUE 0 !(cond) [L691] 0 reach_error() VAL [\old(cond)=0, __global_lock={3:0}, arg={0:0}, arg={0:0}, cond=0, global=1, mutex1={4:0}, mutex2={5:0}] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 118 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: 3.0s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 141 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: 3.7s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 66 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 93 IncrementalHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 93 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 141 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: 4.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 181 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 124 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353 IncrementalHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 8 mSDtfsCounter, 353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=4, InterpolantAutomatonStates: 14, 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, 0.4s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 127 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 12/15 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-03 21:23:47,543 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...