/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/increased_bounds/pthread-wmm_safe022_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:52:31,246 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:52:31,285 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:52:31,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:52:31,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:52:31,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:52:31,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:52:31,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:52:31,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:52:31,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:52:31,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:52:31,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:52:31,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:52:31,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:52:31,304 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:52:31,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:52:31,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:52:31,305 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:52:31,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:52:31,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:52:31,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:52:31,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:52:31,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:52:31,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:52:31,307 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:52:31,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:52:31,307 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:52:31,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:52:31,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:52:31,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:52:31,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:52:31,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:52:31,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:52:31,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:52:31,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:52:31,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:52:31,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:52:31,309 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:52:31,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:52:31,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:52:31,310 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:52:31,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:52:31,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:52:31,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:52:31,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:52:31,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:52:31,447 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:52:31,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe022_tso_bound2.i [2023-08-04 00:52:32,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:52:32,510 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:52:32,510 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe022_tso_bound2.i [2023-08-04 00:52:32,518 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2941230b0/a8cc3ffde16344d88a45758797ddb326/FLAGcd840dfba [2023-08-04 00:52:32,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2941230b0/a8cc3ffde16344d88a45758797ddb326 [2023-08-04 00:52:32,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:52:32,528 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:52:32,529 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:52:32,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:52:32,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:52:32,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161707a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32, skipping insertion in model container [2023-08-04 00:52:32,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,562 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:52:32,658 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe022_tso_bound2.i[945,958] [2023-08-04 00:52:32,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:52:32,767 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:52:32,776 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe022_tso_bound2.i[945,958] [2023-08-04 00:52:32,793 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:52:32,794 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:52:32,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:52:32,838 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:52:32,838 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:52:32,842 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:52:32,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32 WrapperNode [2023-08-04 00:52:32,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:52:32,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:52:32,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:52:32,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:52:32,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,882 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-04 00:52:32,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:52:32,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:52:32,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:52:32,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:52:32,892 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:52:32,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:52:32,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:52:32,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:52:32,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (1/1) ... [2023-08-04 00:52:32,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:52:32,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:32,943 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) [2023-08-04 00:52:32,944 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 [2023-08-04 00:52:32,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:52:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:52:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:52:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:52:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:52:32,969 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:52:33,051 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:52:33,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:52:33,143 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:52:33,148 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:52:33,148 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 00:52:33,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:52:33 BoogieIcfgContainer [2023-08-04 00:52:33,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:52:33,151 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:52:33,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:52:33,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:52:33,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:52:32" (1/3) ... [2023-08-04 00:52:33,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffe5d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:52:33, skipping insertion in model container [2023-08-04 00:52:33,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:52:32" (2/3) ... [2023-08-04 00:52:33,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffe5d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:52:33, skipping insertion in model container [2023-08-04 00:52:33,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:52:33" (3/3) ... [2023-08-04 00:52:33,154 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe022_tso_bound2.i [2023-08-04 00:52:33,159 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:52:33,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:52:33,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:52:33,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:52:33,198 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:52:33,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 00:52:33,296 INFO L124 PetriNetUnfolderBase]: 14/193 cut-off events. [2023-08-04 00:52:33,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:33,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 193 events. 14/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 558 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-04 00:52:33,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 174 flow [2023-08-04 00:52:33,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 122 flow [2023-08-04 00:52:33,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:52:33,320 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 00:52:33,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 56 transitions, 122 flow [2023-08-04 00:52:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 56 transitions, 122 flow [2023-08-04 00:52:33,333 INFO L124 PetriNetUnfolderBase]: 2/89 cut-off events. [2023-08-04 00:52:33,333 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:33,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 89 events. 2/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 133 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-04 00:52:33,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-08-04 00:52:34,558 INFO L134 LiptonReduction]: Checked pairs total: 991 [2023-08-04 00:52:34,558 INFO L136 LiptonReduction]: Total number of compositions: 45 [2023-08-04 00:52:34,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:52:34,571 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;@53d9f22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:52:34,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 00:52:34,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:52:34,575 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 00:52:34,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:34,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:34,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:52:34,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:34,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash 267070782, now seen corresponding path program 1 times [2023-08-04 00:52:34,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525176342] [2023-08-04 00:52:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:52:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525176342] [2023-08-04 00:52:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525176342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:34,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361381163] [2023-08-04 00:52:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:34,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:34,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:34,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 127 [2023-08-04 00:52:34,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:34,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:34,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 127 [2023-08-04 00:52:34,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:34,802 INFO L124 PetriNetUnfolderBase]: 24/72 cut-off events. [2023-08-04 00:52:34,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:34,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 72 events. 24/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 237 event pairs, 6 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 134. Up to 52 conditions per place. [2023-08-04 00:52:34,805 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 12 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-04 00:52:34,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 74 flow [2023-08-04 00:52:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-08-04 00:52:34,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984251968503937 [2023-08-04 00:52:34,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-08-04 00:52:34,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-08-04 00:52:34,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:34,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-08-04 00:52:34,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:34,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:34,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:34,829 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 40 flow. Second operand 3 states and 228 transitions. [2023-08-04 00:52:34,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 74 flow [2023-08-04 00:52:34,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:52:34,831 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 48 flow [2023-08-04 00:52:34,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-04 00:52:34,836 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 00:52:34,836 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 48 flow [2023-08-04 00:52:34,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:34,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:34,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:52:34,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:52:34,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:34,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash -313457513, now seen corresponding path program 1 times [2023-08-04 00:52:34,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:34,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891715889] [2023-08-04 00:52:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:34,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:52:34,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:52:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:52:34,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:52:34,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:52:34,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 00:52:34,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 00:52:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:52:34,884 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:52:34,885 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 00:52:34,886 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:52:34,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:52:34,896 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:52:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 00:52:34,925 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 00:52:34,925 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:52:34,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1716 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-04 00:52:34,927 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 00:52:34,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 70 transitions, 164 flow [2023-08-04 00:52:34,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:52:34,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 70 transitions, 164 flow [2023-08-04 00:52:34,928 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 70 transitions, 164 flow [2023-08-04 00:52:34,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 164 flow [2023-08-04 00:52:34,938 INFO L124 PetriNetUnfolderBase]: 3/178 cut-off events. [2023-08-04 00:52:34,938 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:52:34,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 178 events. 3/178 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 433 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 140. Up to 9 conditions per place. [2023-08-04 00:52:34,940 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 00:52:35,990 INFO L134 LiptonReduction]: Checked pairs total: 3114 [2023-08-04 00:52:35,991 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-04 00:52:35,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:52:35,993 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;@53d9f22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:52:35,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 00:52:35,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:52:35,996 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2023-08-04 00:52:35,996 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 00:52:35,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 00:52:35,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:35,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1405518020, now seen corresponding path program 1 times [2023-08-04 00:52:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246803302] [2023-08-04 00:52:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:36,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246803302] [2023-08-04 00:52:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246803302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699278372] [2023-08-04 00:52:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:36,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:36,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 145 [2023-08-04 00:52:36,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:36,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 145 [2023-08-04 00:52:36,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:36,177 INFO L124 PetriNetUnfolderBase]: 624/1162 cut-off events. [2023-08-04 00:52:36,177 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 00:52:36,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1162 events. 624/1162 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6589 event pairs, 402 based on Foata normal form. 0/1140 useless extension candidates. Maximal degree in co-relation 664. Up to 958 conditions per place. [2023-08-04 00:52:36,185 INFO L140 encePairwiseOnDemand]: 142/145 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 00:52:36,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 124 flow [2023-08-04 00:52:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-04 00:52:36,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6229885057471264 [2023-08-04 00:52:36,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-04 00:52:36,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-04 00:52:36,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:36,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-04 00:52:36,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,193 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 271 transitions. [2023-08-04 00:52:36,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 124 flow [2023-08-04 00:52:36,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 120 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 00:52:36,195 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 82 flow [2023-08-04 00:52:36,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 00:52:36,196 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 00:52:36,196 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 82 flow [2023-08-04 00:52:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:36,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:52:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:52:36,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:36,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -783787863, now seen corresponding path program 1 times [2023-08-04 00:52:36,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908361147] [2023-08-04 00:52:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:36,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:52:36,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908361147] [2023-08-04 00:52:36,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908361147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:36,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193385131] [2023-08-04 00:52:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:36,262 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) [2023-08-04 00:52:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:52:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:36,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:52:36,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:52:36,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:52:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193385131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:36,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:52:36,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:52:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232902140] [2023-08-04 00:52:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:52:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:52:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:52:36,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2023-08-04 00:52:36,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:36,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2023-08-04 00:52:36,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:36,492 INFO L124 PetriNetUnfolderBase]: 612/1129 cut-off events. [2023-08-04 00:52:36,493 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 00:52:36,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 1129 events. 612/1129 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6391 event pairs, 240 based on Foata normal form. 9/1137 useless extension candidates. Maximal degree in co-relation 823. Up to 911 conditions per place. [2023-08-04 00:52:36,498 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 22 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-04 00:52:36,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 148 flow [2023-08-04 00:52:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:52:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:52:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 437 transitions. [2023-08-04 00:52:36,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027586206896551 [2023-08-04 00:52:36,499 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 437 transitions. [2023-08-04 00:52:36,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 437 transitions. [2023-08-04 00:52:36,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:36,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 437 transitions. [2023-08-04 00:52:36,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.4) internal successors, (437), 5 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,502 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 82 flow. Second operand 5 states and 437 transitions. [2023-08-04 00:52:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 148 flow [2023-08-04 00:52:36,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:52:36,503 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 96 flow [2023-08-04 00:52:36,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-04 00:52:36,504 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-04 00:52:36,504 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 96 flow [2023-08-04 00:52:36,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:36,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:36,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:36,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:36,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:36,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1636206893, now seen corresponding path program 1 times [2023-08-04 00:52:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440765245] [2023-08-04 00:52:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:36,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440765245] [2023-08-04 00:52:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440765245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:36,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820232063] [2023-08-04 00:52:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:36,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:36,756 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) [2023-08-04 00:52:36,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:52:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:36,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:52:36,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:36,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:36,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820232063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:36,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:36,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:52:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020762487] [2023-08-04 00:52:36,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:36,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:52:36,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:52:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:36,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2023-08-04 00:52:36,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:36,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2023-08-04 00:52:36,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:36,956 INFO L124 PetriNetUnfolderBase]: 502/899 cut-off events. [2023-08-04 00:52:36,956 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 00:52:36,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 899 events. 502/899 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4644 event pairs, 180 based on Foata normal form. 3/901 useless extension candidates. Maximal degree in co-relation 651. Up to 727 conditions per place. [2023-08-04 00:52:36,959 INFO L140 encePairwiseOnDemand]: 142/145 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 00:52:36,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 154 flow [2023-08-04 00:52:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2023-08-04 00:52:36,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103448275862069 [2023-08-04 00:52:36,961 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2023-08-04 00:52:36,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2023-08-04 00:52:36,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:36,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2023-08-04 00:52:36,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.5) internal successors, (354), 4 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,963 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 96 flow. Second operand 4 states and 354 transitions. [2023-08-04 00:52:36,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 154 flow [2023-08-04 00:52:36,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 149 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:52:36,965 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 89 flow [2023-08-04 00:52:36,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-04 00:52:36,966 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 00:52:36,966 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 89 flow [2023-08-04 00:52:36,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.4) internal successors, (422), 5 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:36,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:36,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:36,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:37,170 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 [2023-08-04 00:52:37,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 00:52:37,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1618575395, now seen corresponding path program 1 times [2023-08-04 00:52:37,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849934563] [2023-08-04 00:52:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:52:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849934563] [2023-08-04 00:52:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849934563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041834617] [2023-08-04 00:52:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:37,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:37,222 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) [2023-08-04 00:52:37,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:52:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:37,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:52:37,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:52:37,303 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:52:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041834617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:37,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:52:37,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:52:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012163431] [2023-08-04 00:52:37,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:37,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:52:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:52:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:37,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 145 [2023-08-04 00:52:37,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:37,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:37,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 145 [2023-08-04 00:52:37,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:37,367 INFO L124 PetriNetUnfolderBase]: 286/544 cut-off events. [2023-08-04 00:52:37,368 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 00:52:37,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 544 events. 286/544 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2531 event pairs, 22 based on Foata normal form. 81/624 useless extension candidates. Maximal degree in co-relation 552. Up to 324 conditions per place. [2023-08-04 00:52:37,370 INFO L140 encePairwiseOnDemand]: 143/145 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 00:52:37,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 161 flow [2023-08-04 00:52:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2023-08-04 00:52:37,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-08-04 00:52:37,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2023-08-04 00:52:37,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2023-08-04 00:52:37,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:37,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2023-08-04 00:52:37,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:37,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:37,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:37,374 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 89 flow. Second operand 4 states and 360 transitions. [2023-08-04 00:52:37,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 161 flow [2023-08-04 00:52:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:52:37,376 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 00:52:37,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 00:52:37,378 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 00:52:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 00:52:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 00:52:37,379 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 00:52:37,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:37,583 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 [2023-08-04 00:52:37,584 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 00:52:37,584 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 00:52:37,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 00:52:37,602 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 00:52:37,602 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 00:52:37,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1716 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-04 00:52:37,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-04 00:52:37,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 84 transitions, 184 flow [2023-08-04 00:52:37,603 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:52:37,603 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 00:52:37,603 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 84 transitions, 184 flow [2023-08-04 00:52:37,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 84 transitions, 184 flow [2023-08-04 00:52:37,615 INFO L124 PetriNetUnfolderBase]: 21/318 cut-off events. [2023-08-04 00:52:37,615 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 00:52:37,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 318 events. 21/318 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1152 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 233. Up to 18 conditions per place. [2023-08-04 00:52:37,618 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-04 00:52:38,765 INFO L134 LiptonReduction]: Checked pairs total: 4286 [2023-08-04 00:52:38,766 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-04 00:52:38,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:52:38,767 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;@53d9f22c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:52:38,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:52:38,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:52:38,768 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-04 00:52:38,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:38,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:38,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 00:52:38,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:38,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 15531099, now seen corresponding path program 1 times [2023-08-04 00:52:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:38,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071589874] [2023-08-04 00:52:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:52:38,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:38,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071589874] [2023-08-04 00:52:38,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071589874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:38,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:38,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:38,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808835661] [2023-08-04 00:52:38,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:38,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:38,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:38,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:38,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 162 [2023-08-04 00:52:38,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:38,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:38,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 162 [2023-08-04 00:52:38,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:38,983 INFO L124 PetriNetUnfolderBase]: 1674/2803 cut-off events. [2023-08-04 00:52:38,983 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 00:52:38,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2803 events. 1674/2803 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16413 event pairs, 1140 based on Foata normal form. 0/2616 useless extension candidates. Maximal degree in co-relation 1555. Up to 2476 conditions per place. [2023-08-04 00:52:38,992 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 00:52:38,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 124 flow [2023-08-04 00:52:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-04 00:52:38,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565843621399177 [2023-08-04 00:52:38,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-04 00:52:38,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-04 00:52:38,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:38,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-04 00:52:38,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:38,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:38,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:38,997 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 70 flow. Second operand 3 states and 275 transitions. [2023-08-04 00:52:38,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 124 flow [2023-08-04 00:52:38,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:52:38,998 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 80 flow [2023-08-04 00:52:38,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 00:52:38,999 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 00:52:38,999 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 80 flow [2023-08-04 00:52:38,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:38,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:38,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:38,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 00:52:38,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:39,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:39,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2124901393, now seen corresponding path program 1 times [2023-08-04 00:52:39,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:39,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501914005] [2023-08-04 00:52:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:52:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501914005] [2023-08-04 00:52:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501914005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032672631] [2023-08-04 00:52:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:39,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:39,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:39,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:52:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:52:39,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:52:39,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:52:39,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032672631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:39,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:52:39,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:52:39,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685914270] [2023-08-04 00:52:39,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:39,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:39,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:39,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:39,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 162 [2023-08-04 00:52:39,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:39,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 162 [2023-08-04 00:52:39,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:39,235 INFO L124 PetriNetUnfolderBase]: 1646/2693 cut-off events. [2023-08-04 00:52:39,235 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 00:52:39,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 2693 events. 1646/2693 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15468 event pairs, 1120 based on Foata normal form. 0/2548 useless extension candidates. Maximal degree in co-relation 5265. Up to 2299 conditions per place. [2023-08-04 00:52:39,245 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 00:52:39,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 154 flow [2023-08-04 00:52:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-04 00:52:39,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720164609053497 [2023-08-04 00:52:39,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-04 00:52:39,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-04 00:52:39,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:39,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-04 00:52:39,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,248 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 80 flow. Second operand 3 states and 278 transitions. [2023-08-04 00:52:39,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 154 flow [2023-08-04 00:52:39,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:39,250 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 90 flow [2023-08-04 00:52:39,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 00:52:39,251 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 00:52:39,252 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 90 flow [2023-08-04 00:52:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:39,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:39,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:39,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:39,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:39,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -926263982, now seen corresponding path program 1 times [2023-08-04 00:52:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:39,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943824069] [2023-08-04 00:52:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:52:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943824069] [2023-08-04 00:52:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943824069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016175624] [2023-08-04 00:52:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:39,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:39,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:39,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:52:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:52:39,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:52:39,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:52:39,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016175624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:39,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:39,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:52:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663020463] [2023-08-04 00:52:39,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:52:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:52:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:39,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2023-08-04 00:52:39,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:39,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2023-08-04 00:52:39,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:39,679 INFO L124 PetriNetUnfolderBase]: 1336/2141 cut-off events. [2023-08-04 00:52:39,679 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 00:52:39,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 2141 events. 1336/2141 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11333 event pairs, 564 based on Foata normal form. 3/2143 useless extension candidates. Maximal degree in co-relation 1599. Up to 1882 conditions per place. [2023-08-04 00:52:39,687 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 26 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-08-04 00:52:39,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 166 flow [2023-08-04 00:52:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-04 00:52:39,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524691358024691 [2023-08-04 00:52:39,688 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-04 00:52:39,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-04 00:52:39,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:39,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-04 00:52:39,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,690 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,690 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 90 flow. Second operand 4 states and 358 transitions. [2023-08-04 00:52:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 166 flow [2023-08-04 00:52:39,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:39,691 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 102 flow [2023-08-04 00:52:39,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-04 00:52:39,692 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-04 00:52:39,692 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 102 flow [2023-08-04 00:52:39,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:39,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:39,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:39,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:39,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:39,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:39,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -174710745, now seen corresponding path program 1 times [2023-08-04 00:52:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530610309] [2023-08-04 00:52:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:52:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530610309] [2023-08-04 00:52:39,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530610309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658465167] [2023-08-04 00:52:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:39,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:39,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:52:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:39,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:52:39,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:52:39,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:52:39,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658465167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:39,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:39,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:52:39,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300394125] [2023-08-04 00:52:39,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:39,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:52:39,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:52:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:40,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2023-08-04 00:52:40,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:40,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2023-08-04 00:52:40,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:40,135 INFO L124 PetriNetUnfolderBase]: 1216/1861 cut-off events. [2023-08-04 00:52:40,135 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 00:52:40,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1861 events. 1216/1861 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9145 event pairs, 400 based on Foata normal form. 27/1887 useless extension candidates. Maximal degree in co-relation 1421. Up to 943 conditions per place. [2023-08-04 00:52:40,142 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 34 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 00:52:40,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2023-08-04 00:52:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 00:52:40,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2023-08-04 00:52:40,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 00:52:40,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 00:52:40,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:40,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 00:52:40,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,146 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 102 flow. Second operand 4 states and 366 transitions. [2023-08-04 00:52:40,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2023-08-04 00:52:40,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:52:40,148 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 109 flow [2023-08-04 00:52:40,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 00:52:40,149 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 00:52:40,149 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 109 flow [2023-08-04 00:52:40,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:40,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:40,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:40,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:40,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash 42149353, now seen corresponding path program 1 times [2023-08-04 00:52:40,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:40,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185640402] [2023-08-04 00:52:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:52:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:40,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185640402] [2023-08-04 00:52:40,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185640402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:40,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:40,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:52:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048984367] [2023-08-04 00:52:40,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:40,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:40,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:40,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:40,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:40,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 162 [2023-08-04 00:52:40,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:40,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 162 [2023-08-04 00:52:40,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:40,528 INFO L124 PetriNetUnfolderBase]: 970/1579 cut-off events. [2023-08-04 00:52:40,528 INFO L125 PetriNetUnfolderBase]: For 1054/1054 co-relation queries the response was YES. [2023-08-04 00:52:40,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3673 conditions, 1579 events. 970/1579 cut-off events. For 1054/1054 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8117 event pairs, 244 based on Foata normal form. 9/1587 useless extension candidates. Maximal degree in co-relation 1297. Up to 1195 conditions per place. [2023-08-04 00:52:40,535 INFO L140 encePairwiseOnDemand]: 158/162 looper letters, 30 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-04 00:52:40,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 219 flow [2023-08-04 00:52:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-04 00:52:40,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823045267489712 [2023-08-04 00:52:40,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-04 00:52:40,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-04 00:52:40,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:40,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-04 00:52:40,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,538 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 109 flow. Second operand 3 states and 283 transitions. [2023-08-04 00:52:40,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 219 flow [2023-08-04 00:52:40,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 207 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:52:40,539 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 121 flow [2023-08-04 00:52:40,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2023-08-04 00:52:40,540 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 00:52:40,540 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 121 flow [2023-08-04 00:52:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:40,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:40,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 00:52:40,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:40,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1306629298, now seen corresponding path program 1 times [2023-08-04 00:52:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429967416] [2023-08-04 00:52:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:52:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429967416] [2023-08-04 00:52:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429967416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:40,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139404576] [2023-08-04 00:52:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:40,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:52:40,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:40,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:52:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:52:40,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 162 [2023-08-04 00:52:40,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:40,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 162 [2023-08-04 00:52:40,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:40,821 INFO L124 PetriNetUnfolderBase]: 2526/3871 cut-off events. [2023-08-04 00:52:40,822 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-04 00:52:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9595 conditions, 3871 events. 2526/3871 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22150 event pairs, 400 based on Foata normal form. 128/3985 useless extension candidates. Maximal degree in co-relation 7333. Up to 1737 conditions per place. [2023-08-04 00:52:40,837 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 53 selfloop transitions, 7 changer transitions 2/66 dead transitions. [2023-08-04 00:52:40,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 388 flow [2023-08-04 00:52:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-08-04 00:52:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5848765432098766 [2023-08-04 00:52:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-08-04 00:52:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-08-04 00:52:40,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:40,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-08-04 00:52:40,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 162.0) internal successors, (810), 5 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,840 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 121 flow. Second operand 4 states and 379 transitions. [2023-08-04 00:52:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 388 flow [2023-08-04 00:52:40,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:40,842 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 177 flow [2023-08-04 00:52:40,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-04 00:52:40,842 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2023-08-04 00:52:40,842 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 177 flow [2023-08-04 00:52:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:40,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:52:40,843 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:40,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1998985423, now seen corresponding path program 1 times [2023-08-04 00:52:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:40,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895606683] [2023-08-04 00:52:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:40,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:52:40,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:40,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895606683] [2023-08-04 00:52:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895606683] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:40,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778289011] [2023-08-04 00:52:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:40,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 162 [2023-08-04 00:52:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 162 [2023-08-04 00:52:40,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:41,065 INFO L124 PetriNetUnfolderBase]: 1570/2453 cut-off events. [2023-08-04 00:52:41,066 INFO L125 PetriNetUnfolderBase]: For 2654/2679 co-relation queries the response was YES. [2023-08-04 00:52:41,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6986 conditions, 2453 events. 1570/2453 cut-off events. For 2654/2679 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12676 event pairs, 346 based on Foata normal form. 43/2440 useless extension candidates. Maximal degree in co-relation 5112. Up to 2014 conditions per place. [2023-08-04 00:52:41,076 INFO L140 encePairwiseOnDemand]: 156/162 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-04 00:52:41,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 385 flow [2023-08-04 00:52:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:52:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:52:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-04 00:52:41,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823045267489712 [2023-08-04 00:52:41,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-04 00:52:41,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-04 00:52:41,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:41,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-04 00:52:41,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,079 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 177 flow. Second operand 3 states and 283 transitions. [2023-08-04 00:52:41,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 385 flow [2023-08-04 00:52:41,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:41,081 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 205 flow [2023-08-04 00:52:41,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-04 00:52:41,082 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-04 00:52:41,082 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 205 flow [2023-08-04 00:52:41,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:41,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:41,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 00:52:41,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:41,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash 567468137, now seen corresponding path program 1 times [2023-08-04 00:52:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:41,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123705091] [2023-08-04 00:52:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 00:52:41,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123705091] [2023-08-04 00:52:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123705091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:41,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323970363] [2023-08-04 00:52:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:41,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:41,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:52:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:41,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 00:52:41,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:52:41,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:52:41,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323970363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:41,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-08-04 00:52:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44496768] [2023-08-04 00:52:41,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:41,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 00:52:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 00:52:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-08-04 00:52:41,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 162 [2023-08-04 00:52:41,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 205 flow. Second operand has 13 states, 13 states have (on average 76.76923076923077) internal successors, (998), 13 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:41,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 162 [2023-08-04 00:52:41,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:41,942 INFO L124 PetriNetUnfolderBase]: 3328/4834 cut-off events. [2023-08-04 00:52:41,942 INFO L125 PetriNetUnfolderBase]: For 5981/5981 co-relation queries the response was YES. [2023-08-04 00:52:41,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 4834 events. 3328/4834 cut-off events. For 5981/5981 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24645 event pairs, 135 based on Foata normal form. 204/5035 useless extension candidates. Maximal degree in co-relation 12040. Up to 1746 conditions per place. [2023-08-04 00:52:41,964 INFO L140 encePairwiseOnDemand]: 150/162 looper letters, 133 selfloop transitions, 43 changer transitions 4/182 dead transitions. [2023-08-04 00:52:41,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 182 transitions, 1218 flow [2023-08-04 00:52:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 00:52:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 00:52:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1033 transitions. [2023-08-04 00:52:41,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313786008230452 [2023-08-04 00:52:41,966 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1033 transitions. [2023-08-04 00:52:41,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1033 transitions. [2023-08-04 00:52:41,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:41,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1033 transitions. [2023-08-04 00:52:41,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.08333333333333) internal successors, (1033), 12 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 162.0) internal successors, (2106), 13 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,971 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 162.0) internal successors, (2106), 13 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,971 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 205 flow. Second operand 12 states and 1033 transitions. [2023-08-04 00:52:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 182 transitions, 1218 flow [2023-08-04 00:52:41,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 182 transitions, 1207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:52:41,976 INFO L231 Difference]: Finished difference. Result has 68 places, 78 transitions, 529 flow [2023-08-04 00:52:41,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=529, PETRI_PLACES=68, PETRI_TRANSITIONS=78} [2023-08-04 00:52:41,976 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 33 predicate places. [2023-08-04 00:52:41,976 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 78 transitions, 529 flow [2023-08-04 00:52:41,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 76.76923076923077) internal successors, (998), 13 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:41,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:41,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:41,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 00:52:42,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:42,182 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:42,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1353740005, now seen corresponding path program 1 times [2023-08-04 00:52:42,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:42,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755485173] [2023-08-04 00:52:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:42,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:42,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755485173] [2023-08-04 00:52:42,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755485173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:42,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799784578] [2023-08-04 00:52:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:42,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:42,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:42,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:52:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:42,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 00:52:42,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:42,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:52:42,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799784578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:42,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:42,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 14 [2023-08-04 00:52:42,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868616156] [2023-08-04 00:52:42,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 00:52:42,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 00:52:42,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-04 00:52:42,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 162 [2023-08-04 00:52:42,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 78 transitions, 529 flow. Second operand has 15 states, 15 states have (on average 79.33333333333333) internal successors, (1190), 15 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:42,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:42,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 162 [2023-08-04 00:52:42,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:43,224 INFO L124 PetriNetUnfolderBase]: 4071/6352 cut-off events. [2023-08-04 00:52:43,224 INFO L125 PetriNetUnfolderBase]: For 14582/14816 co-relation queries the response was YES. [2023-08-04 00:52:43,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25114 conditions, 6352 events. 4071/6352 cut-off events. For 14582/14816 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40220 event pairs, 51 based on Foata normal form. 228/6517 useless extension candidates. Maximal degree in co-relation 25010. Up to 2574 conditions per place. [2023-08-04 00:52:43,249 INFO L140 encePairwiseOnDemand]: 151/162 looper letters, 147 selfloop transitions, 62 changer transitions 56/275 dead transitions. [2023-08-04 00:52:43,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 275 transitions, 2202 flow [2023-08-04 00:52:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-04 00:52:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-04 00:52:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1482 transitions. [2023-08-04 00:52:43,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381263616557734 [2023-08-04 00:52:43,255 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1482 transitions. [2023-08-04 00:52:43,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1482 transitions. [2023-08-04 00:52:43,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:43,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1482 transitions. [2023-08-04 00:52:43,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.17647058823529) internal successors, (1482), 17 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:43,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 162.0) internal successors, (2916), 18 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:43,265 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 162.0) internal successors, (2916), 18 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:43,265 INFO L175 Difference]: Start difference. First operand has 68 places, 78 transitions, 529 flow. Second operand 17 states and 1482 transitions. [2023-08-04 00:52:43,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 275 transitions, 2202 flow [2023-08-04 00:52:43,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 275 transitions, 2098 flow, removed 38 selfloop flow, removed 2 redundant places. [2023-08-04 00:52:43,305 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 971 flow [2023-08-04 00:52:43,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=971, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2023-08-04 00:52:43,306 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 59 predicate places. [2023-08-04 00:52:43,306 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 971 flow [2023-08-04 00:52:43,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 79.33333333333333) internal successors, (1190), 15 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:52:43,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:43,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:43,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 00:52:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:52:43,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:52:43,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1684939493, now seen corresponding path program 1 times [2023-08-04 00:52:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:43,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975541141] [2023-08-04 00:52:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:52:43,521 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:52:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:52:43,538 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:52:43,538 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:52:43,539 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 00:52:43,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:52:43,539 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:43,541 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 00:52:43,543 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:52:43,543 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:52:43,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:52:43 BasicIcfg [2023-08-04 00:52:43,587 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:52:43,588 INFO L158 Benchmark]: Toolchain (without parser) took 11059.21ms. Allocated memory was 352.3MB in the beginning and 648.0MB in the end (delta: 295.7MB). Free memory was 313.8MB in the beginning and 471.7MB in the end (delta: -157.9MB). Peak memory consumption was 139.5MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,588 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 352.3MB. Free memory is still 304.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:52:43,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.80ms. Allocated memory is still 352.3MB. Free memory was 313.8MB in the beginning and 293.3MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,588 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.72ms. Allocated memory is still 352.3MB. Free memory was 293.3MB in the beginning and 291.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,588 INFO L158 Benchmark]: Boogie Preprocessor took 36.28ms. Allocated memory is still 352.3MB. Free memory was 291.6MB in the beginning and 289.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,588 INFO L158 Benchmark]: RCFGBuilder took 229.84ms. Allocated memory is still 352.3MB. Free memory was 289.9MB in the beginning and 276.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,589 INFO L158 Benchmark]: TraceAbstraction took 10436.78ms. Allocated memory was 352.3MB in the beginning and 648.0MB in the end (delta: 295.7MB). Free memory was 276.0MB in the beginning and 471.7MB in the end (delta: -195.8MB). Peak memory consumption was 101.7MB. Max. memory is 16.0GB. [2023-08-04 00:52:43,590 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 352.3MB. Free memory is still 304.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 314.80ms. Allocated memory is still 352.3MB. Free memory was 313.8MB in the beginning and 293.3MB in the end (delta: 20.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.72ms. Allocated memory is still 352.3MB. Free memory was 293.3MB in the beginning and 291.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.28ms. Allocated memory is still 352.3MB. Free memory was 291.6MB in the beginning and 289.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 229.84ms. Allocated memory is still 352.3MB. Free memory was 289.9MB in the beginning and 276.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10436.78ms. Allocated memory was 352.3MB in the beginning and 648.0MB in the end (delta: 295.7MB). Free memory was 276.0MB in the beginning and 471.7MB in the end (delta: -195.8MB). Peak memory consumption was 101.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 60 PlacesBefore, 20 PlacesAfterwards, 56 TransitionsBefore, 15 TransitionsAfterwards, 492 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 45 TotalNumberOfCompositions, 991 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 583, independent: 533, independent conditional: 0, independent unconditional: 533, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 257, independent: 250, independent conditional: 0, independent unconditional: 250, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 583, independent: 283, independent conditional: 0, independent unconditional: 283, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 257, unknown conditional: 0, unknown unconditional: 257] , Statistics on independence cache: Total cache size (in pairs): 29, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.1s, 78 PlacesBefore, 34 PlacesAfterwards, 70 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 49 TotalNumberOfCompositions, 3114 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1823, independent: 1726, independent conditional: 0, independent unconditional: 1726, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 676, independent: 658, independent conditional: 0, independent unconditional: 658, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1823, independent: 1068, independent conditional: 0, independent unconditional: 1068, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 676, unknown conditional: 0, unknown unconditional: 676] , Statistics on independence cache: Total cache size (in pairs): 100, Positive cache size: 91, Positive conditional cache size: 0, Positive unconditional cache size: 91, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 90 PlacesBefore, 35 PlacesAfterwards, 84 TransitionsBefore, 27 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 2 ChoiceCompositions, 66 TotalNumberOfCompositions, 4286 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2150, independent: 2044, independent conditional: 0, independent unconditional: 2044, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1057, independent: 1027, independent conditional: 0, independent unconditional: 1027, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2150, independent: 1017, independent conditional: 0, independent unconditional: 1017, dependent: 76, dependent conditional: 0, dependent unconditional: 76, unknown: 1057, unknown conditional: 0, unknown unconditional: 1057] , Statistics on independence cache: Total cache size (in pairs): 99, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p1_EAX = 0; [L712] 0 int __unbuffered_p1_EBX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L718] 0 int y = 0; [L760] 0 pthread_t t2317[2]; [L761] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, x=0, y=0] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t2317[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2317[asdf], ((void *)0), P0, ((void *)0))=-4, t2317={5:0}, x=0, y=0] [L761] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, x=0, y=0] [L761] COND TRUE 0 asdf<2 [L761] FCALL, FORK 0 pthread_create(&t2317[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2317[asdf], ((void *)0), P0, ((void *)0))=-3, t2317={5:0}, x=0, y=0] [L761] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, x=0, y=0] [L761] COND FALSE 0 !(asdf<2) [L762] 0 pthread_t t2318[2]; [L763] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, t2318={3:0}, x=0, y=0] [L763] COND TRUE 0 asdf<2 [L763] FCALL, FORK 0 pthread_create(&t2318[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2318[asdf], ((void *)0), P1, ((void *)0))=-2, t2317={5:0}, t2318={3:0}, x=0, y=0] [L763] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, t2318={3:0}, x=0, y=0] [L763] COND TRUE 0 asdf<2 [L763] FCALL, FORK 0 pthread_create(&t2318[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2318[asdf], ((void *)0), P1, ((void *)0))=-1, t2317={5:0}, t2318={3:0}, x=0, y=0] [L763] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2317={5:0}, t2318={3:0}, x=0, y=0] [L722] 1 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L722] 2 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L725] 1 x = 1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=1] [L730] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L732] 1 return 0; [L730] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L732] 2 return 0; [L737] 3 __unbuffered_p1_EAX = x VAL [\result={0:0}, __unbuffered_cnt=2, __unbuffered_p1_EAX=1, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=1] [L763] COND FALSE 0 !(asdf<2) [L765] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L767] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) VAL [\old(cond)=1, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p1_EAX=1, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, cond=1, main$tmp_guard0=1, main$tmp_guard1=0, x=1, y=1] [L767] RET 0 assume_abort_if_not(main$tmp_guard0) [L771] 0 main$tmp_guard1 = !(__unbuffered_p1_EAX == 1 && __unbuffered_p1_EBX == 0) [L773] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p1_EAX=1, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=1, y=1] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 93 locations, 3 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: 1.7s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 28 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 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 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 103 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 212 IncrementalHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 2 mSDtfsCounter, 212 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 188 SizeOfPredicates, 0 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 50/61 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 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 567 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 499 mSDsluCounter, 96 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 69 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1357 IncrementalHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 27 mSDtfsCounter, 1357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 199 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=971occurred in iteration=9, InterpolantAutomatonStates: 53, 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, 0.9s InterpolantComputationTime, 267 NumberOfCodeBlocks, 267 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 1182 SizeOfPredicates, 7 NumberOfNonLiveVariables, 695 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 115/137 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! [2023-08-04 00:52:43,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...