/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_78-equ_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:32:10,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:32:10,547 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:32:10,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:32:10,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:32:10,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:32:10,566 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:32:10,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:32:10,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:32:10,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:32:10,586 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:32:10,586 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:32:10,587 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:32:10,587 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:32:10,587 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:32:10,587 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:32:10,587 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:32:10,588 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:32:10,588 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:32:10,588 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:32:10,588 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:32:10,591 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:32:10,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:32:10,591 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:32:10,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:32:10,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:32:10,592 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:32:10,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:32:10,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:32:10,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:32:10,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:32:10,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:32:10,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:32:10,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:32:10,594 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:32:10,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:32:10,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:32:10,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:32:10,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:32:10,761 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:32:10,761 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:32:10,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_78-equ_racing_bound2.i [2023-08-03 21:32:11,839 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:32:12,080 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:32:12,080 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_78-equ_racing_bound2.i [2023-08-03 21:32:12,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12610e8b0/11e27d8ca4534666ae1388a034a6f4a3/FLAG23480a9d9 [2023-08-03 21:32:12,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12610e8b0/11e27d8ca4534666ae1388a034a6f4a3 [2023-08-03 21:32:12,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:32:12,114 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:32:12,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:32:12,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:32:12,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:32:12,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a87d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12, skipping insertion in model container [2023-08-03 21:32:12,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,158 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:32:12,449 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_78-equ_racing_bound2.i[47038,47051] [2023-08-03 21:32:12,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:32:12,485 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:32:12,503 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:32:12,504 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:32:12,513 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_78-equ_racing_bound2.i[47038,47051] [2023-08-03 21:32:12,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:32:12,558 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:32:12,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12 WrapperNode [2023-08-03 21:32:12,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:32:12,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:32:12,560 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:32:12,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:32:12,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,593 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 204 [2023-08-03 21:32:12,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:32:12,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:32:12,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:32:12,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:32:12,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,608 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,611 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,612 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:32:12,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:32:12,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:32:12,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:32:12,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (1/1) ... [2023-08-03 21:32:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:32:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:32:12,639 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 21:32:12,648 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 21:32:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:32:12,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:32:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:32:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:32:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:32:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:32:12,679 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:32:12,680 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:32:12,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:32:12,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:32:12,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:32:12,682 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 21:32:12,786 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:32:12,802 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:32:12,994 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:32:13,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:32:13,000 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-03 21:32:13,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:32:13 BoogieIcfgContainer [2023-08-03 21:32:13,002 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:32:13,003 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:32:13,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:32:13,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:32:13,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:32:12" (1/3) ... [2023-08-03 21:32:13,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448911d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:32:13, skipping insertion in model container [2023-08-03 21:32:13,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:32:12" (2/3) ... [2023-08-03 21:32:13,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448911d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:32:13, skipping insertion in model container [2023-08-03 21:32:13,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:32:13" (3/3) ... [2023-08-03 21:32:13,008 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_78-equ_racing_bound2.i [2023-08-03 21:32:13,013 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:32:13,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:32:13,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 21:32:13,020 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:32:13,065 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:32:13,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 201 transitions, 410 flow [2023-08-03 21:32:13,156 INFO L124 PetriNetUnfolderBase]: 43/271 cut-off events. [2023-08-03 21:32:13,156 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:32:13,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 271 events. 43/271 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 823 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-03 21:32:13,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 201 transitions, 410 flow [2023-08-03 21:32:13,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 194 transitions, 393 flow [2023-08-03 21:32:13,167 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:32:13,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-03 21:32:13,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 194 transitions, 393 flow [2023-08-03 21:32:13,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 194 transitions, 393 flow [2023-08-03 21:32:13,209 INFO L124 PetriNetUnfolderBase]: 41/264 cut-off events. [2023-08-03 21:32:13,209 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:32:13,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 41/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 803 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-03 21:32:13,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 8664 [2023-08-03 21:32:18,678 INFO L134 LiptonReduction]: Checked pairs total: 18412 [2023-08-03 21:32:18,679 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-03 21:32:18,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:32:18,699 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;@7ca26669, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:32:18,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:32:18,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:32:18,706 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2023-08-03 21:32:18,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:32:18,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:18,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:32:18,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:32:18,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1260636167, now seen corresponding path program 1 times [2023-08-03 21:32:18,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:18,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918428086] [2023-08-03 21:32:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:32:18,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:32:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:32:18,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:32:18,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:32:18,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:32:18,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:32:18,903 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:32:18,905 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:32:18,906 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:32:18,906 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:32:18,934 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:32:18,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-03 21:32:19,000 INFO L124 PetriNetUnfolderBase]: 72/424 cut-off events. [2023-08-03 21:32:19,001 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:32:19,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-03 21:32:19,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-03 21:32:19,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:19,009 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:32:19,009 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:19,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:19,038 INFO L124 PetriNetUnfolderBase]: 71/422 cut-off events. [2023-08-03 21:32:19,038 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:32:19,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-03 21:32:19,050 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-03 21:32:24,498 INFO L134 LiptonReduction]: Checked pairs total: 57220 [2023-08-03 21:32:24,498 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-03 21:32:24,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:32:24,500 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;@7ca26669, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:32:24,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:32:24,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:32:24,505 INFO L124 PetriNetUnfolderBase]: 37/113 cut-off events. [2023-08-03 21:32:24,505 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:32:24,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:24,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:32:24,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:32:24,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash -147922955, now seen corresponding path program 1 times [2023-08-03 21:32:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:24,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308871971] [2023-08-03 21:32:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:24,719 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 21:32:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308871971] [2023-08-03 21:32:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308871971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:32:24,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571003048] [2023-08-03 21:32:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:24,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:32:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:32:24,740 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 21:32:24,799 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 21:32:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:24,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:32:24,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:32:25,209 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 21:32:25,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:32:25,231 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 21:32:25,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571003048] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:32:25,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:32:25,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2023-08-03 21:32:25,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12219238] [2023-08-03 21:32:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:32:25,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:32:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:32:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:32:25,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-08-03 21:32:25,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:32:25,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:25,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-08-03 21:32:25,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:26,123 INFO L124 PetriNetUnfolderBase]: 8009/13561 cut-off events. [2023-08-03 21:32:26,123 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-03 21:32:26,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25829 conditions, 13561 events. 8009/13561 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 105115 event pairs, 0 based on Foata normal form. 3221/14882 useless extension candidates. Maximal degree in co-relation 2205. Up to 11645 conditions per place. [2023-08-03 21:32:26,150 INFO L140 encePairwiseOnDemand]: 431/466 looper letters, 0 selfloop transitions, 0 changer transitions 113/113 dead transitions. [2023-08-03 21:32:26,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 438 flow [2023-08-03 21:32:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:32:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:32:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1226 transitions. [2023-08-03 21:32:26,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261802575107296 [2023-08-03 21:32:26,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1226 transitions. [2023-08-03 21:32:26,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1226 transitions. [2023-08-03 21:32:26,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:26,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1226 transitions. [2023-08-03 21:32:26,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 245.2) internal successors, (1226), 5 states have internal predecessors, (1226), 0 states have call successors, (0), 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 21:32:26,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:26,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:26,180 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 5 states and 1226 transitions. [2023-08-03 21:32:26,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 438 flow [2023-08-03 21:32:26,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:32:26,185 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-03 21:32:26,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-03 21:32:26,188 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2023-08-03 21:32:26,189 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-03 21:32:26,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:32:26,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:32:26,209 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 21:32:26,395 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 21:32:26,395 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:32:26,396 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:32:26,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 260 transitions, 538 flow [2023-08-03 21:32:26,428 INFO L124 PetriNetUnfolderBase]: 72/424 cut-off events. [2023-08-03 21:32:26,428 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:32:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 424 events. 72/424 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1596 event pairs, 0 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 273. Up to 12 conditions per place. [2023-08-03 21:32:26,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 260 transitions, 538 flow [2023-08-03 21:32:26,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:26,435 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:32:26,435 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:26,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:26,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 258 transitions, 534 flow [2023-08-03 21:32:26,464 INFO L124 PetriNetUnfolderBase]: 71/422 cut-off events. [2023-08-03 21:32:26,464 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:32:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 422 events. 71/422 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1612 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2023-08-03 21:32:26,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 25080 [2023-08-03 21:32:31,862 INFO L134 LiptonReduction]: Checked pairs total: 57214 [2023-08-03 21:32:31,862 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-03 21:32:31,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:32:31,869 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;@7ca26669, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:32:31,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 21:32:31,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:32:31,872 INFO L124 PetriNetUnfolderBase]: 7/26 cut-off events. [2023-08-03 21:32:31,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:32:31,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:31,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 21:32:31,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:31,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1431016033, now seen corresponding path program 1 times [2023-08-03 21:32:31,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:31,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53122478] [2023-08-03 21:32:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:31,933 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 21:32:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53122478] [2023-08-03 21:32:31,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53122478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:32:31,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:32:31,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:32:31,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021261079] [2023-08-03 21:32:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:32:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:32:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:32:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:32:31,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 466 [2023-08-03 21:32:31,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 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 21:32:31,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:31,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 466 [2023-08-03 21:32:31,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:32,647 INFO L124 PetriNetUnfolderBase]: 8903/13936 cut-off events. [2023-08-03 21:32:32,647 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-03 21:32:32,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26898 conditions, 13936 events. 8903/13936 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 93286 event pairs, 6020 based on Foata normal form. 3325/15003 useless extension candidates. Maximal degree in co-relation 11579. Up to 12844 conditions per place. [2023-08-03 21:32:32,684 INFO L140 encePairwiseOnDemand]: 432/466 looper letters, 66 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-03 21:32:32,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 320 flow [2023-08-03 21:32:32,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:32:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:32:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2023-08-03 21:32:32,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379113018597997 [2023-08-03 21:32:32,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2023-08-03 21:32:32,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2023-08-03 21:32:32,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:32,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2023-08-03 21:32:32,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 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 21:32:32,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 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 21:32:32,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 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 21:32:32,692 INFO L175 Difference]: Start difference. First operand has 67 places, 98 transitions, 214 flow. Second operand 3 states and 752 transitions. [2023-08-03 21:32:32,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 320 flow [2023-08-03 21:32:32,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:32:32,695 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 164 flow [2023-08-03 21:32:32,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-08-03 21:32:32,697 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-03 21:32:32,697 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 164 flow [2023-08-03 21:32:32,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 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 21:32:32,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:32,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:32:32,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:32:32,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:32,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash 485087152, now seen corresponding path program 1 times [2023-08-03 21:32:32,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111097181] [2023-08-03 21:32:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:32,869 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 21:32:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111097181] [2023-08-03 21:32:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111097181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:32:32,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:32:32,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:32:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957954540] [2023-08-03 21:32:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:32:32,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:32:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:32:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:32:32,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 466 [2023-08-03 21:32:32,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 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 21:32:32,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:32,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 466 [2023-08-03 21:32:32,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:33,898 INFO L124 PetriNetUnfolderBase]: 10896/17643 cut-off events. [2023-08-03 21:32:33,898 INFO L125 PetriNetUnfolderBase]: For 752/752 co-relation queries the response was YES. [2023-08-03 21:32:33,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35086 conditions, 17643 events. 10896/17643 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 128370 event pairs, 3240 based on Foata normal form. 0/15451 useless extension candidates. Maximal degree in co-relation 34978. Up to 10915 conditions per place. [2023-08-03 21:32:33,951 INFO L140 encePairwiseOnDemand]: 453/466 looper letters, 116 selfloop transitions, 12 changer transitions 7/150 dead transitions. [2023-08-03 21:32:33,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 150 transitions, 626 flow [2023-08-03 21:32:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:32:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:32:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 961 transitions. [2023-08-03 21:32:33,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155579399141631 [2023-08-03 21:32:33,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 961 transitions. [2023-08-03 21:32:33,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 961 transitions. [2023-08-03 21:32:33,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:33,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 961 transitions. [2023-08-03 21:32:33,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 240.25) internal successors, (961), 4 states have internal predecessors, (961), 0 states have call successors, (0), 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 21:32:33,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 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 21:32:33,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 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 21:32:33,961 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 164 flow. Second operand 4 states and 961 transitions. [2023-08-03 21:32:33,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 150 transitions, 626 flow [2023-08-03 21:32:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 150 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:32:33,967 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 262 flow [2023-08-03 21:32:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-08-03 21:32:33,968 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-08-03 21:32:33,968 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 262 flow [2023-08-03 21:32:33,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 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 21:32:33,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:33,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:32:33,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:32:33,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:33,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash -702947631, now seen corresponding path program 1 times [2023-08-03 21:32:33,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:33,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910475103] [2023-08-03 21:32:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:34,023 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 21:32:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910475103] [2023-08-03 21:32:34,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910475103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:32:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631447327] [2023-08-03 21:32:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:32:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:32:34,025 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 21:32:34,057 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 21:32:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:34,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:32:34,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:32:34,298 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 21:32:34,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:32:34,308 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 21:32:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631447327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:32:34,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:32:34,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:32:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707777873] [2023-08-03 21:32:34,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:32:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:32:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:32:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:32:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 466 [2023-08-03 21:32:34,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 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 21:32:34,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:34,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 466 [2023-08-03 21:32:34,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:35,146 INFO L124 PetriNetUnfolderBase]: 10606/17915 cut-off events. [2023-08-03 21:32:35,146 INFO L125 PetriNetUnfolderBase]: For 5060/5060 co-relation queries the response was YES. [2023-08-03 21:32:35,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40302 conditions, 17915 events. 10606/17915 cut-off events. For 5060/5060 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 137959 event pairs, 800 based on Foata normal form. 15/16692 useless extension candidates. Maximal degree in co-relation 8700. Up to 14947 conditions per place. [2023-08-03 21:32:35,201 INFO L140 encePairwiseOnDemand]: 462/466 looper letters, 110 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-03 21:32:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 646 flow [2023-08-03 21:32:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:32:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:32:35,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 950 transitions. [2023-08-03 21:32:35,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509656652360515 [2023-08-03 21:32:35,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 950 transitions. [2023-08-03 21:32:35,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 950 transitions. [2023-08-03 21:32:35,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:35,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 950 transitions. [2023-08-03 21:32:35,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 237.5) internal successors, (950), 4 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:32:35,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 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 21:32:35,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 466.0) internal successors, (2330), 5 states have internal predecessors, (2330), 0 states have call successors, (0), 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 21:32:35,209 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 262 flow. Second operand 4 states and 950 transitions. [2023-08-03 21:32:35,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 646 flow [2023-08-03 21:32:35,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 129 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:32:35,212 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 284 flow [2023-08-03 21:32:35,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-08-03 21:32:35,213 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 13 predicate places. [2023-08-03 21:32:35,213 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 284 flow [2023-08-03 21:32:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.2) internal successors, (1076), 5 states have internal predecessors, (1076), 0 states have call successors, (0), 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 21:32:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:32:35,235 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 21:32:35,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:32:35,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:35,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1443713406, now seen corresponding path program 1 times [2023-08-03 21:32:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:35,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617275727] [2023-08-03 21:32:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:35,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:32:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617275727] [2023-08-03 21:32:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617275727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:32:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744917477] [2023-08-03 21:32:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:32:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:32:35,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:32:35,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 21:32:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:35,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-03 21:32:35,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:32:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:32:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:32:36,054 INFO L322 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-08-03 21:32:36,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2023-08-03 21:32:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:32:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 21:32:36,158 INFO L322 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-08-03 21:32:36,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2023-08-03 21:32:36,450 INFO L322 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2023-08-03 21:32:36,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 309 [2023-08-03 21:32:37,166 INFO L322 Elim1Store]: treesize reduction 56, result has 27.3 percent of original size [2023-08-03 21:32:37,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 309 [2023-08-03 21:32:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:32:38,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:32:38,063 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_140 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_140) |c_ULTIMATE.start_main_~d~0#1.base|) |c_ULTIMATE.start_main_~d~0#1.offset|) 0)) is different from false [2023-08-03 21:32:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-03 21:32:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744917477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:32:38,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:32:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-03 21:32:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112476942] [2023-08-03 21:32:38,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:32:38,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 21:32:38,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 21:32:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=23, Unknown=1, NotChecked=10, Total=56 [2023-08-03 21:32:38,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 466 [2023-08-03 21:32:38,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 284 flow. Second operand has 8 states, 8 states have (on average 175.75) internal successors, (1406), 8 states have internal predecessors, (1406), 0 states have call successors, (0), 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 21:32:38,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:38,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 466 [2023-08-03 21:32:38,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:39,196 INFO L124 PetriNetUnfolderBase]: 12368/20379 cut-off events. [2023-08-03 21:32:39,196 INFO L125 PetriNetUnfolderBase]: For 9491/9509 co-relation queries the response was YES. [2023-08-03 21:32:39,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47919 conditions, 20379 events. 12368/20379 cut-off events. For 9491/9509 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 153513 event pairs, 4252 based on Foata normal form. 6/19098 useless extension candidates. Maximal degree in co-relation 22463. Up to 13637 conditions per place. [2023-08-03 21:32:39,242 INFO L140 encePairwiseOnDemand]: 457/466 looper letters, 118 selfloop transitions, 10 changer transitions 23/166 dead transitions. [2023-08-03 21:32:39,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 166 transitions, 850 flow [2023-08-03 21:32:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:32:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:32:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 999 transitions. [2023-08-03 21:32:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42875536480686693 [2023-08-03 21:32:39,245 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 999 transitions. [2023-08-03 21:32:39,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 999 transitions. [2023-08-03 21:32:39,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:39,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 999 transitions. [2023-08-03 21:32:39,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 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 21:32:39,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:39,249 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:39,249 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 284 flow. Second operand 5 states and 999 transitions. [2023-08-03 21:32:39,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 166 transitions, 850 flow [2023-08-03 21:32:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 166 transitions, 843 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 21:32:39,254 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 343 flow [2023-08-03 21:32:39,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-03 21:32:39,255 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-03 21:32:39,255 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 343 flow [2023-08-03 21:32:39,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 175.75) internal successors, (1406), 8 states have internal predecessors, (1406), 0 states have call successors, (0), 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 21:32:39,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:39,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:32:39,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 21:32:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:32:39,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:39,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1218342449, now seen corresponding path program 1 times [2023-08-03 21:32:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892397642] [2023-08-03 21:32:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:32:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:32:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:32:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892397642] [2023-08-03 21:32:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892397642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:32:39,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:32:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:32:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874253454] [2023-08-03 21:32:39,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:32:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:32:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:32:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:32:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:32:39,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 466 [2023-08-03 21:32:39,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 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 21:32:39,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:32:39,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 466 [2023-08-03 21:32:39,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:32:40,866 INFO L124 PetriNetUnfolderBase]: 8366/16356 cut-off events. [2023-08-03 21:32:40,867 INFO L125 PetriNetUnfolderBase]: For 9890/9890 co-relation queries the response was YES. [2023-08-03 21:32:40,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40588 conditions, 16356 events. 8366/16356 cut-off events. For 9890/9890 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 143698 event pairs, 1235 based on Foata normal form. 1787/17054 useless extension candidates. Maximal degree in co-relation 34889. Up to 5131 conditions per place. [2023-08-03 21:32:40,918 INFO L140 encePairwiseOnDemand]: 443/466 looper letters, 198 selfloop transitions, 51 changer transitions 18/276 dead transitions. [2023-08-03 21:32:40,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 276 transitions, 1724 flow [2023-08-03 21:32:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:32:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:32:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1180 transitions. [2023-08-03 21:32:40,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064377682403434 [2023-08-03 21:32:40,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1180 transitions. [2023-08-03 21:32:40,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1180 transitions. [2023-08-03 21:32:40,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:32:40,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1180 transitions. [2023-08-03 21:32:40,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 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 21:32:40,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:40,926 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 466.0) internal successors, (2796), 6 states have internal predecessors, (2796), 0 states have call successors, (0), 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 21:32:40,926 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 343 flow. Second operand 5 states and 1180 transitions. [2023-08-03 21:32:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 276 transitions, 1724 flow [2023-08-03 21:32:40,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 276 transitions, 1707 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:32:40,938 INFO L231 Difference]: Finished difference. Result has 91 places, 121 transitions, 590 flow [2023-08-03 21:32:40,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=590, PETRI_PLACES=91, PETRI_TRANSITIONS=121} [2023-08-03 21:32:40,940 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 24 predicate places. [2023-08-03 21:32:40,940 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 121 transitions, 590 flow [2023-08-03 21:32:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 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 21:32:40,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:32:40,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:32:40,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:32:40,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 21:32:40,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:32:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -44829969, now seen corresponding path program 1 times [2023-08-03 21:32:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:32:40,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206125623] [2023-08-03 21:32:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:32:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:32:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:32:40,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:32:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:32:40,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:32:40,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:32:40,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 21:32:40,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 21:32:40,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 21:32:40,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 21:32:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 21:32:40,980 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-03 21:32:40,981 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 21:32:40,983 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:32:40,983 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:32:41,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:32:41 BasicIcfg [2023-08-03 21:32:41,034 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:32:41,034 INFO L158 Benchmark]: Toolchain (without parser) took 28920.15ms. Allocated memory was 515.9MB in the beginning and 1.6GB in the end (delta: 1.0GB). Free memory was 465.6MB in the beginning and 854.8MB in the end (delta: -389.2MB). Peak memory consumption was 661.4MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,034 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 371.2MB. Free memory is still 323.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:32:41,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 444.08ms. Allocated memory is still 515.9MB. Free memory was 465.2MB in the beginning and 436.2MB in the end (delta: 29.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,034 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.86ms. Allocated memory is still 515.9MB. Free memory was 435.9MB in the beginning and 433.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,035 INFO L158 Benchmark]: Boogie Preprocessor took 21.86ms. Allocated memory is still 515.9MB. Free memory was 433.4MB in the beginning and 431.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,035 INFO L158 Benchmark]: RCFGBuilder took 386.00ms. Allocated memory is still 515.9MB. Free memory was 431.3MB in the beginning and 470.8MB in the end (delta: -39.5MB). Peak memory consumption was 14.2MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,035 INFO L158 Benchmark]: TraceAbstraction took 28030.33ms. Allocated memory was 515.9MB in the beginning and 1.6GB in the end (delta: 1.0GB). Free memory was 470.8MB in the beginning and 854.8MB in the end (delta: -384.0MB). Peak memory consumption was 664.0MB. Max. memory is 16.0GB. [2023-08-03 21:32:41,036 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 371.2MB. Free memory is still 323.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 444.08ms. Allocated memory is still 515.9MB. Free memory was 465.2MB in the beginning and 436.2MB in the end (delta: 29.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.86ms. Allocated memory is still 515.9MB. Free memory was 435.9MB in the beginning and 433.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.86ms. Allocated memory is still 515.9MB. Free memory was 433.4MB in the beginning and 431.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 386.00ms. Allocated memory is still 515.9MB. Free memory was 431.3MB in the beginning and 470.8MB in the end (delta: -39.5MB). Peak memory consumption was 14.2MB. Max. memory is 16.0GB. * TraceAbstraction took 28030.33ms. Allocated memory was 515.9MB in the beginning and 1.6GB in the end (delta: 1.0GB). Free memory was 470.8MB in the beginning and 854.8MB in the end (delta: -384.0MB). Peak memory consumption was 664.0MB. 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: 5.5s, 170 PlacesBefore, 44 PlacesAfterwards, 194 TransitionsBefore, 64 TransitionsAfterwards, 8664 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 166 TotalNumberOfCompositions, 18412 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7930, independent: 7563, independent conditional: 0, independent unconditional: 7563, dependent: 367, dependent conditional: 0, dependent unconditional: 367, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4262, independent: 4204, independent conditional: 0, independent unconditional: 4204, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7930, independent: 3359, independent conditional: 0, independent unconditional: 3359, dependent: 309, dependent conditional: 0, dependent unconditional: 309, unknown: 4262, unknown conditional: 0, unknown unconditional: 4262] , Statistics on independence cache: Total cache size (in pairs): 222, Positive cache size: 194, Positive conditional cache size: 0, Positive unconditional cache size: 194, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.5s, 222 PlacesBefore, 67 PlacesAfterwards, 258 TransitionsBefore, 98 TransitionsAfterwards, 25080 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 115 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 206 TotalNumberOfCompositions, 57220 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 22399, independent: 21824, independent conditional: 0, independent unconditional: 21824, dependent: 575, dependent conditional: 0, dependent unconditional: 575, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 11916, independent: 11825, independent conditional: 0, independent unconditional: 11825, dependent: 91, dependent conditional: 0, dependent unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 22399, independent: 9999, independent conditional: 0, independent unconditional: 9999, dependent: 484, dependent conditional: 0, dependent unconditional: 484, unknown: 11916, unknown conditional: 0, unknown unconditional: 11916] , Statistics on independence cache: Total cache size (in pairs): 521, Positive cache size: 478, Positive conditional cache size: 0, Positive unconditional cache size: 478, Negative cache size: 43, Negative conditional cache size: 0, Negative unconditional cache size: 43, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 222 PlacesBefore, 67 PlacesAfterwards, 258 TransitionsBefore, 98 TransitionsAfterwards, 25080 CoEnabledTransitionPairs, 8 FixpointIterations, 60 TrivialSequentialCompositions, 116 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 206 TotalNumberOfCompositions, 57214 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 21967, independent: 21392, independent conditional: 0, independent unconditional: 21392, dependent: 575, dependent conditional: 0, dependent unconditional: 575, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 11945, independent: 11847, independent conditional: 0, independent unconditional: 11847, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 21967, independent: 9545, independent conditional: 0, independent unconditional: 9545, dependent: 477, dependent conditional: 0, dependent unconditional: 477, unknown: 11945, unknown conditional: 0, unknown unconditional: 11945] , Statistics on independence cache: Total cache size (in pairs): 540, Positive cache size: 497, Positive conditional cache size: 0, Positive unconditional cache size: 497, Negative cache size: 43, Negative conditional cache size: 0, Negative unconditional cache size: 43, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 999]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] 0 pthread_mutex_t __global_lock = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L1006-L1010] 0 struct s { int datum; struct q inside; pthread_mutex_t mutex; } A, B; [L1020] 0 int x = __VERIFIER_nondet_int(); [L1021] COND FALSE 0 !(x == 2147483647) [L1024] 0 struct s *s; [L1025] 0 int *d; [L1026] 0 pthread_mutex_t *m; [L1027] COND FALSE 0 !(\read(x)) [L1031] 0 s = &B [L1032] 0 x++ [L1034] 0 m = &s->mutex [L1035] 0 d = &s->datum [L1036] 0 pthread_t t_ids[2]; [L1036] 0 int i=0; VAL [A={4:0}, B={5:0}, __global_lock={3:0}, d={5:0}, i=0, m={5:12}, s={5:0}, t_ids={6:0}, x=1] [L1036] COND TRUE 0 i<2 [L1036] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [A={4:0}, B={5:0}, __global_lock={3:0}, d={5:0}, i=0, m={5:12}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=0, s={5:0}, t_ids={6:0}, x=1] [L1036] 0 i++ VAL [A={4:0}, B={5:0}, __global_lock={3:0}, d={5:0}, i=1, m={5:12}, s={5:0}, t_ids={6:0}, x=1] [L1036] COND TRUE 0 i<2 [L1036] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [A={4:0}, B={5:0}, __global_lock={3:0}, d={5:0}, i=1, m={5:12}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=1, s={5:0}, t_ids={6:0}, x=1] [L1036] 0 i++ VAL [A={4:0}, B={5:0}, __global_lock={3:0}, d={5:0}, i=2, m={5:12}, s={5:0}, t_ids={6:0}, x=1] [L1036] COND FALSE 0 !(i<2) [L1038] COND FALSE 0 !(__VERIFIER_nondet_int()) [L1013] COND TRUE 1 __VERIFIER_nondet_int() [L1013] EXPR 1 B.datum VAL [A={4:0}, B.datum=0, B={5:0}, __global_lock={3:0}, arg={0:0}, arg={0:0}] [L1013] 1 (B.datum)++ [L1038] EXPR 0 \read(*d) [L1038] CALL 0 __VERIFIER_assert((*d) == 0) [L999] COND TRUE 0 !(cond) [L999] 0 reach_error() VAL [A={4:0}, B={5:0}, \old(cond)=0, __global_lock={3:0}, cond=0] - UnprovableResult [Line: 999]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 219 locations, 4 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: 5.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred 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, 0.1s 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, 265 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.5s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 159 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 170 IncrementalHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 1 mSDtfsCounter, 170 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=214occurred 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, 0.6s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 92 SizeOfPredicates, 22 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 14/24 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, 265 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.6s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 645 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 491 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 169 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1399 IncrementalHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 107 mSolverCounterUnsat, 8 mSDtfsCounter, 1399 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=590occurred in iteration=5, InterpolantAutomatonStates: 21, 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, 3.1s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 86 ConstructedInterpolants, 5 QuantifiedInterpolants, 4826 SizeOfPredicates, 42 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 5/23 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 21:32:41,064 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...