/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/weaver_chl-collitem-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:01:31,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:01:31,395 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:01:31,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:01:31,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:01:31,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:01:31,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:01:31,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:01:31,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:01:31,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:01:31,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:01:31,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:01:31,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:01:31,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:01:31,431 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:01:31,431 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:01:31,431 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:01:31,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:01:31,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:01:31,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:01:31,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:01:31,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:01:31,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:01:31,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:01:31,440 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:01:31,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:01:31,440 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:01:31,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:01:31,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:01:31,441 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:01:31,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:01:31,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:01:31,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:01:31,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:01:31,442 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:01:31,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:01:31,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:01:31,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:01:31,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:01:31,651 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:01:31,652 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:01:31,653 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-symm.wvr_bound2.c [2023-08-04 02:01:32,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:01:32,831 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:01:32,831 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-symm.wvr_bound2.c [2023-08-04 02:01:32,836 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302e2e0f8/c507699d1dff4ceca2bcca1c55591ae6/FLAG462daa87d [2023-08-04 02:01:32,848 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/302e2e0f8/c507699d1dff4ceca2bcca1c55591ae6 [2023-08-04 02:01:32,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:01:32,851 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:01:32,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:01:32,852 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:01:32,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:01:32,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:01:32" (1/1) ... [2023-08-04 02:01:32,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b43f0f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:32, skipping insertion in model container [2023-08-04 02:01:32,855 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:01:32" (1/1) ... [2023-08-04 02:01:32,870 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:01:32,980 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-symm.wvr_bound2.c[3148,3161] [2023-08-04 02:01:32,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:01:32,989 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:01:33,011 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-collitem-symm.wvr_bound2.c[3148,3161] [2023-08-04 02:01:33,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:01:33,020 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:01:33,020 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:01:33,025 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:01:33,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33 WrapperNode [2023-08-04 02:01:33,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:01:33,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:01:33,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:01:33,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:01:33,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,062 INFO L138 Inliner]: procedures = 22, calls = 35, calls flagged for inlining = 15, calls inlined = 29, statements flattened = 294 [2023-08-04 02:01:33,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:01:33,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:01:33,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:01:33,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:01:33,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:01:33,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:01:33,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:01:33,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:01:33,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (1/1) ... [2023-08-04 02:01:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:01:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:33,122 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 02:01:33,124 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 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:01:33,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:01:33,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:01:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:01:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:01:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:01:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:01:33,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:01:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:01:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:01:33,148 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 02:01:33,224 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:01:33,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:01:33,509 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:01:33,832 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:01:33,833 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 02:01:33,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:01:33 BoogieIcfgContainer [2023-08-04 02:01:33,837 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:01:33,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:01:33,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:01:33,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:01:33,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:01:32" (1/3) ... [2023-08-04 02:01:33,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3910ecb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:01:33, skipping insertion in model container [2023-08-04 02:01:33,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:01:33" (2/3) ... [2023-08-04 02:01:33,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3910ecb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:01:33, skipping insertion in model container [2023-08-04 02:01:33,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:01:33" (3/3) ... [2023-08-04 02:01:33,848 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-collitem-symm.wvr_bound2.c [2023-08-04 02:01:33,853 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:01:33,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:01:33,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:01:33,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:01:33,920 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:01:33,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 312 flow [2023-08-04 02:01:34,063 INFO L124 PetriNetUnfolderBase]: 34/314 cut-off events. [2023-08-04 02:01:34,064 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:01:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 314 events. 34/314 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 935 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2023-08-04 02:01:34,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 145 transitions, 312 flow [2023-08-04 02:01:34,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 93 transitions, 196 flow [2023-08-04 02:01:34,072 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:01:34,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 93 transitions, 196 flow [2023-08-04 02:01:34,084 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 93 transitions, 196 flow [2023-08-04 02:01:34,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 93 transitions, 196 flow [2023-08-04 02:01:34,101 INFO L124 PetriNetUnfolderBase]: 2/122 cut-off events. [2023-08-04 02:01:34,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:01:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 122 events. 2/122 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 97. Up to 4 conditions per place. [2023-08-04 02:01:34,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 222 [2023-08-04 02:01:40,109 INFO L134 LiptonReduction]: Checked pairs total: 173 [2023-08-04 02:01:40,109 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 02:01:40,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:01:40,123 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;@7754db59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:01:40,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:01:40,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:01:40,126 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-08-04 02:01:40,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:01:40,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:40,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 02:01:40,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:40,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash 920487810, now seen corresponding path program 1 times [2023-08-04 02:01:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:40,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776165684] [2023-08-04 02:01:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:40,276 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 02:01:40,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:40,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776165684] [2023-08-04 02:01:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776165684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:40,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:01:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739698459] [2023-08-04 02:01:40,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:40,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:40,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 231 [2023-08-04 02:01:40,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 11 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 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 02:01:40,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:40,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 231 [2023-08-04 02:01:40,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:40,348 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2023-08-04 02:01:40,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:01:40,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 33 events. 9/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 2 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 60. Up to 24 conditions per place. [2023-08-04 02:01:40,349 INFO L140 encePairwiseOnDemand]: 228/231 looper letters, 9 selfloop transitions, 2 changer transitions 0/13 dead transitions. [2023-08-04 02:01:40,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 13 transitions, 58 flow [2023-08-04 02:01:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-04 02:01:40,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2023-08-04 02:01:40,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-04 02:01:40,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-04 02:01:40,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:40,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-04 02:01:40,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 02:01:40,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:40,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:40,369 INFO L175 Difference]: Start difference. First operand has 16 places, 11 transitions, 32 flow. Second operand 3 states and 387 transitions. [2023-08-04 02:01:40,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 13 transitions, 58 flow [2023-08-04 02:01:40,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:01:40,372 INFO L231 Difference]: Finished difference. Result has 19 places, 11 transitions, 40 flow [2023-08-04 02:01:40,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2023-08-04 02:01:40,375 INFO L281 CegarLoopForPetriNet]: 16 programPoint places, 3 predicate places. [2023-08-04 02:01:40,375 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 40 flow [2023-08-04 02:01:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 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 02:01:40,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:40,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:01:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:01:40,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:40,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1530515312, now seen corresponding path program 1 times [2023-08-04 02:01:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35588215] [2023-08-04 02:01:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:01:40,394 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:01:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:01:40,418 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:01:40,418 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:01:40,419 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:01:40,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:01:40,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:01:40,421 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 02:01:40,422 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:01:40,423 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:01:40,423 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:01:40,463 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:01:40,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 157 transitions, 362 flow [2023-08-04 02:01:40,546 INFO L124 PetriNetUnfolderBase]: 149/998 cut-off events. [2023-08-04 02:01:40,546 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:01:40,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 998 events. 149/998 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5119 event pairs, 1 based on Foata normal form. 0/846 useless extension candidates. Maximal degree in co-relation 584. Up to 32 conditions per place. [2023-08-04 02:01:40,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 157 transitions, 362 flow [2023-08-04 02:01:40,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 101 transitions, 226 flow [2023-08-04 02:01:40,550 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:01:40,550 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 101 transitions, 226 flow [2023-08-04 02:01:40,550 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 101 transitions, 226 flow [2023-08-04 02:01:40,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 101 transitions, 226 flow [2023-08-04 02:01:40,565 INFO L124 PetriNetUnfolderBase]: 3/195 cut-off events. [2023-08-04 02:01:40,565 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 02:01:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 195 events. 3/195 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 294 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 166. Up to 9 conditions per place. [2023-08-04 02:01:40,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-04 02:01:47,819 INFO L134 LiptonReduction]: Checked pairs total: 631 [2023-08-04 02:01:47,819 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-04 02:01:47,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:01:47,822 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;@7754db59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:01:47,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:01:47,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:01:47,827 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 02:01:47,827 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 02:01:47,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:47,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:01:47,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:47,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1127885909, now seen corresponding path program 1 times [2023-08-04 02:01:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262199198] [2023-08-04 02:01:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:47,901 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 02:01:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262199198] [2023-08-04 02:01:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262199198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:47,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:47,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:01:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495675132] [2023-08-04 02:01:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:47,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 245 [2023-08-04 02:01:47,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 02:01:47,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:47,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 245 [2023-08-04 02:01:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:48,066 INFO L124 PetriNetUnfolderBase]: 119/250 cut-off events. [2023-08-04 02:01:48,066 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 02:01:48,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 250 events. 119/250 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 918 event pairs, 72 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 224. Up to 214 conditions per place. [2023-08-04 02:01:48,071 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 14 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-08-04 02:01:48,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 96 flow [2023-08-04 02:01:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-04 02:01:48,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496598639455782 [2023-08-04 02:01:48,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-04 02:01:48,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-04 02:01:48,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:48,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-04 02:01:48,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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 02:01:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 02:01:48,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 02:01:48,083 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 58 flow. Second operand 3 states and 404 transitions. [2023-08-04 02:01:48,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 96 flow [2023-08-04 02:01:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 92 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 02:01:48,086 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 66 flow [2023-08-04 02:01:48,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-04 02:01:48,087 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-04 02:01:48,087 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 66 flow [2023-08-04 02:01:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 02:01:48,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:48,087 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:01:48,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:01:48,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:48,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -805152358, now seen corresponding path program 1 times [2023-08-04 02:01:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:48,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042639553] [2023-08-04 02:01:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,182 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 02:01:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042639553] [2023-08-04 02:01:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042639553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:48,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:01:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714739534] [2023-08-04 02:01:48,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:48,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 245 [2023-08-04 02:01:48,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 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 02:01:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 245 [2023-08-04 02:01:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:48,304 INFO L124 PetriNetUnfolderBase]: 115/242 cut-off events. [2023-08-04 02:01:48,304 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 02:01:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 242 events. 115/242 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 876 event pairs, 42 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 302. Up to 193 conditions per place. [2023-08-04 02:01:48,305 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 15 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-04 02:01:48,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 112 flow [2023-08-04 02:01:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:01:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:01:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2023-08-04 02:01:48,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2023-08-04 02:01:48,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2023-08-04 02:01:48,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2023-08-04 02:01:48,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:48,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2023-08-04 02:01:48,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 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 02:01:48,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 02:01:48,311 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 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 02:01:48,311 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 66 flow. Second operand 5 states and 660 transitions. [2023-08-04 02:01:48,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 112 flow [2023-08-04 02:01:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:01:48,312 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 80 flow [2023-08-04 02:01:48,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-04 02:01:48,313 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-08-04 02:01:48,313 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 80 flow [2023-08-04 02:01:48,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 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 02:01:48,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:48,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:48,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:01:48,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:48,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1630478786, now seen corresponding path program 1 times [2023-08-04 02:01:48,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:48,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424434802] [2023-08-04 02:01:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,347 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 02:01:48,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:48,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424434802] [2023-08-04 02:01:48,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424434802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:48,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929737282] [2023-08-04 02:01:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:48,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:48,351 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 02:01:48,352 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 02:01:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:01:48,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:48,486 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 02:01:48,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:48,496 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 02:01:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929737282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:48,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 02:01:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855005347] [2023-08-04 02:01:48,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:01:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:01:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:01:48,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 245 [2023-08-04 02:01:48,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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 02:01:48,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:48,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 245 [2023-08-04 02:01:48,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:48,580 INFO L124 PetriNetUnfolderBase]: 88/179 cut-off events. [2023-08-04 02:01:48,580 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 02:01:48,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 179 events. 88/179 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 546 event pairs, 28 based on Foata normal form. 2/176 useless extension candidates. Maximal degree in co-relation 215. Up to 141 conditions per place. [2023-08-04 02:01:48,581 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 15 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-04 02:01:48,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 118 flow [2023-08-04 02:01:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-04 02:01:48,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5418367346938775 [2023-08-04 02:01:48,583 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-04 02:01:48,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-04 02:01:48,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:48,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-04 02:01:48,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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 02:01:48,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 02:01:48,586 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 02:01:48,586 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 80 flow. Second operand 4 states and 531 transitions. [2023-08-04 02:01:48,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 118 flow [2023-08-04 02:01:48,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 113 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:01:48,587 INFO L231 Difference]: Finished difference. Result has 33 places, 17 transitions, 73 flow [2023-08-04 02:01:48,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2023-08-04 02:01:48,588 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-04 02:01:48,588 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 73 flow [2023-08-04 02:01:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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 02:01:48,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:48,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:48,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:01:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:48,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:01:48,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1388111342, now seen corresponding path program 1 times [2023-08-04 02:01:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:48,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671251440] [2023-08-04 02:01:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:48,864 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 02:01:48,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:48,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671251440] [2023-08-04 02:01:48,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671251440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:48,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:01:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33143081] [2023-08-04 02:01:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:01:48,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:01:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:01:48,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 245 [2023-08-04 02:01:48,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 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 02:01:48,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:48,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 245 [2023-08-04 02:01:48,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:48,947 INFO L124 PetriNetUnfolderBase]: 56/123 cut-off events. [2023-08-04 02:01:48,948 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 02:01:48,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 123 events. 56/123 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 321 event pairs, 8 based on Foata normal form. 16/134 useless extension candidates. Maximal degree in co-relation 190. Up to 60 conditions per place. [2023-08-04 02:01:48,948 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2023-08-04 02:01:48,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 21 transitions, 117 flow [2023-08-04 02:01:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2023-08-04 02:01:48,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459183673469388 [2023-08-04 02:01:48,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 535 transitions. [2023-08-04 02:01:48,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 535 transitions. [2023-08-04 02:01:48,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:48,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 535 transitions. [2023-08-04 02:01:48,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.75) internal successors, (535), 4 states have internal predecessors, (535), 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 02:01:48,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 02:01:48,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 02:01:48,954 INFO L175 Difference]: Start difference. First operand has 33 places, 17 transitions, 73 flow. Second operand 4 states and 535 transitions. [2023-08-04 02:01:48,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 21 transitions, 117 flow [2023-08-04 02:01:48,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:01:48,956 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 02:01:48,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 02:01:48,958 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-04 02:01:48,958 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 02:01:48,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.5) internal successors, (526), 4 states have internal predecessors, (526), 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 02:01:48,958 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:01:48,959 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:01:48,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:01:48,959 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:01:48,960 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:01:48,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 157 transitions, 362 flow [2023-08-04 02:01:49,018 INFO L124 PetriNetUnfolderBase]: 149/998 cut-off events. [2023-08-04 02:01:49,018 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 02:01:49,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1095 conditions, 998 events. 149/998 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5119 event pairs, 1 based on Foata normal form. 0/846 useless extension candidates. Maximal degree in co-relation 584. Up to 32 conditions per place. [2023-08-04 02:01:49,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 157 transitions, 362 flow [2023-08-04 02:01:49,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 147 transitions, 334 flow [2023-08-04 02:01:49,021 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:01:49,021 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 147 transitions, 334 flow [2023-08-04 02:01:49,022 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 147 transitions, 334 flow [2023-08-04 02:01:49,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 147 transitions, 334 flow [2023-08-04 02:01:49,067 INFO L124 PetriNetUnfolderBase]: 149/866 cut-off events. [2023-08-04 02:01:49,067 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-04 02:01:49,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 866 events. 149/866 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4062 event pairs, 1 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 517. Up to 32 conditions per place. [2023-08-04 02:01:49,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 1608 [2023-08-04 02:01:56,610 INFO L134 LiptonReduction]: Checked pairs total: 4116 [2023-08-04 02:01:56,611 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-08-04 02:01:56,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:01:56,612 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;@7754db59, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:01:56,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:01:56,614 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:01:56,614 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 02:01:56,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:01:56,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:56,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 02:01:56,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:56,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1282404198, now seen corresponding path program 1 times [2023-08-04 02:01:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214412784] [2023-08-04 02:01:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:56,637 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 02:01:56,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:56,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214412784] [2023-08-04 02:01:56,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214412784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:56,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:56,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:01:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246628310] [2023-08-04 02:01:56,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:56,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:01:56,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 283 [2023-08-04 02:01:56,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 02:01:56,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:56,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 283 [2023-08-04 02:01:56,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:57,157 INFO L124 PetriNetUnfolderBase]: 1269/2243 cut-off events. [2023-08-04 02:01:57,157 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 02:01:57,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 2243 events. 1269/2243 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11516 event pairs, 803 based on Foata normal form. 0/2026 useless extension candidates. Maximal degree in co-relation 1784. Up to 2103 conditions per place. [2023-08-04 02:01:57,164 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-04 02:01:57,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 184 flow [2023-08-04 02:01:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-04 02:01:57,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49823321554770317 [2023-08-04 02:01:57,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-04 02:01:57,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-04 02:01:57,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:57,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-04 02:01:57,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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 02:01:57,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:57,168 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:57,168 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 112 flow. Second operand 3 states and 423 transitions. [2023-08-04 02:01:57,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 184 flow [2023-08-04 02:01:57,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:01:57,172 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 116 flow [2023-08-04 02:01:57,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-04 02:01:57,173 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-08-04 02:01:57,173 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 116 flow [2023-08-04 02:01:57,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 02:01:57,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:57,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:57,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 02:01:57,173 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:57,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:57,174 INFO L85 PathProgramCache]: Analyzing trace with hash -888635391, now seen corresponding path program 1 times [2023-08-04 02:01:57,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:57,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432382329] [2023-08-04 02:01:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:57,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:57,218 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 02:01:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432382329] [2023-08-04 02:01:57,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432382329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303923655] [2023-08-04 02:01:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:57,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:57,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:57,222 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 02:01:57,226 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 02:01:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:57,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:57,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:57,336 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 02:01:57,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303923655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:01:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695901702] [2023-08-04 02:01:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:57,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 283 [2023-08-04 02:01:57,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 02:01:57,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:57,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 283 [2023-08-04 02:01:57,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:57,868 INFO L124 PetriNetUnfolderBase]: 1263/2251 cut-off events. [2023-08-04 02:01:57,868 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-08-04 02:01:57,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4632 conditions, 2251 events. 1263/2251 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11660 event pairs, 806 based on Foata normal form. 0/2046 useless extension candidates. Maximal degree in co-relation 4604. Up to 2057 conditions per place. [2023-08-04 02:01:57,875 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 35 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 02:01:57,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 200 flow [2023-08-04 02:01:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-04 02:01:57,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4994110718492344 [2023-08-04 02:01:57,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-04 02:01:57,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-04 02:01:57,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:57,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-04 02:01:57,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 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 02:01:57,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:57,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:57,879 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 116 flow. Second operand 3 states and 424 transitions. [2023-08-04 02:01:57,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 200 flow [2023-08-04 02:01:57,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:57,882 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 126 flow [2023-08-04 02:01:57,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-08-04 02:01:57,882 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 02:01:57,883 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 126 flow [2023-08-04 02:01:57,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 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 02:01:57,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:57,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:57,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 02:01:58,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-04 02:01:58,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:58,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash 353014266, now seen corresponding path program 1 times [2023-08-04 02:01:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061487741] [2023-08-04 02:01:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:58,143 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 02:01:58,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061487741] [2023-08-04 02:01:58,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061487741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:58,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844404381] [2023-08-04 02:01:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:58,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:58,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:58,145 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 02:01:58,147 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 02:01:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:58,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:58,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:01:58,275 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844404381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:58,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:01:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266650459] [2023-08-04 02:01:58,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:58,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:58,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:58,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 283 [2023-08-04 02:01:58,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 02:01:58,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:58,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 283 [2023-08-04 02:01:58,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:58,753 INFO L124 PetriNetUnfolderBase]: 1109/2041 cut-off events. [2023-08-04 02:01:58,753 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 02:01:58,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 2041 events. 1109/2041 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10686 event pairs, 772 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 1960. Up to 1577 conditions per place. [2023-08-04 02:01:58,759 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 41 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 02:01:58,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 242 flow [2023-08-04 02:01:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 02:01:58,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053003533568905 [2023-08-04 02:01:58,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 02:01:58,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 02:01:58,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:58,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 02:01:58,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 02:01:58,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:58,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:58,763 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 126 flow. Second operand 3 states and 429 transitions. [2023-08-04 02:01:58,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 242 flow [2023-08-04 02:01:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:58,764 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 136 flow [2023-08-04 02:01:58,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-04 02:01:58,765 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-04 02:01:58,765 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 136 flow [2023-08-04 02:01:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 02:01:58,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:58,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:58,772 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 02:01:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:58,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:58,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash 686077835, now seen corresponding path program 1 times [2023-08-04 02:01:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:58,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667190681] [2023-08-04 02:01:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:01:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667190681] [2023-08-04 02:01:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667190681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988834358] [2023-08-04 02:01:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:59,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:59,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:59,011 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 02:01:59,013 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 02:01:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:59,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:59,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:01:59,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:59,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988834358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:59,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:59,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:01:59,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698899454] [2023-08-04 02:01:59,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:59,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 283 [2023-08-04 02:01:59,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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 02:01:59,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:59,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 283 [2023-08-04 02:01:59,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:59,624 INFO L124 PetriNetUnfolderBase]: 1020/1940 cut-off events. [2023-08-04 02:01:59,624 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 02:01:59,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4357 conditions, 1940 events. 1020/1940 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9984 event pairs, 731 based on Foata normal form. 0/1900 useless extension candidates. Maximal degree in co-relation 2123. Up to 1403 conditions per place. [2023-08-04 02:01:59,632 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 02:01:59,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 254 flow [2023-08-04 02:01:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 02:01:59,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053003533568905 [2023-08-04 02:01:59,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 02:01:59,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 02:01:59,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:59,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 02:01:59,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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 02:01:59,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:01:59,636 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 136 flow. Second operand 3 states and 429 transitions. [2023-08-04 02:01:59,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 254 flow [2023-08-04 02:01:59,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:59,638 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 146 flow [2023-08-04 02:01:59,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-08-04 02:01:59,639 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-04 02:01:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 146 flow [2023-08-04 02:01:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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 02:01:59,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:59,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:59,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 02:01:59,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:59,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:59,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:59,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1355824242, now seen corresponding path program 1 times [2023-08-04 02:01:59,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:59,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551160400] [2023-08-04 02:01:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:59,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:01:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551160400] [2023-08-04 02:01:59,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551160400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:59,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3879269] [2023-08-04 02:01:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:59,931 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 02:01:59,932 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 02:02:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:00,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:00,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:02:00,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:02:00,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3879269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:00,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:00,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:02:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822405538] [2023-08-04 02:02:00,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:00,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-04 02:02:00,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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 02:02:00,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:00,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-04 02:02:00,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:00,562 INFO L124 PetriNetUnfolderBase]: 918/1744 cut-off events. [2023-08-04 02:02:00,563 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 02:02:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4021 conditions, 1744 events. 918/1744 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8798 event pairs, 415 based on Foata normal form. 2/1741 useless extension candidates. Maximal degree in co-relation 2162. Up to 1587 conditions per place. [2023-08-04 02:02:00,571 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 36 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 02:02:00,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 236 flow [2023-08-04 02:02:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-04 02:02:00,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48586572438162545 [2023-08-04 02:02:00,574 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-04 02:02:00,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-04 02:02:00,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:00,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-04 02:02:00,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 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 02:02:00,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:00,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:00,576 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 146 flow. Second operand 4 states and 550 transitions. [2023-08-04 02:02:00,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 236 flow [2023-08-04 02:02:00,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:00,581 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 158 flow [2023-08-04 02:02:00,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-08-04 02:02:00,582 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2023-08-04 02:02:00,582 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 158 flow [2023-08-04 02:02:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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 02:02:00,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:00,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:00,603 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 02:02:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 02:02:00,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:00,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash -243556230, now seen corresponding path program 1 times [2023-08-04 02:02:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722822950] [2023-08-04 02:02:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:00,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:00,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722822950] [2023-08-04 02:02:00,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722822950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:00,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234840490] [2023-08-04 02:02:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:00,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:00,844 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 02:02:00,846 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 02:02:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:00,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:00,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:00,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:02:01,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234840490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:01,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:01,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607713849] [2023-08-04 02:02:01,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:01,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:01,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:01,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-04 02:02:01,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 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 02:02:01,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:01,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-04 02:02:01,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:01,438 INFO L124 PetriNetUnfolderBase]: 866/1648 cut-off events. [2023-08-04 02:02:01,438 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-04 02:02:01,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3788 conditions, 1648 events. 866/1648 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7998 event pairs, 392 based on Foata normal form. 8/1651 useless extension candidates. Maximal degree in co-relation 2367. Up to 1367 conditions per place. [2023-08-04 02:02:01,443 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 3 changer transitions 1/48 dead transitions. [2023-08-04 02:02:01,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 264 flow [2023-08-04 02:02:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 554 transitions. [2023-08-04 02:02:01,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48939929328621906 [2023-08-04 02:02:01,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 554 transitions. [2023-08-04 02:02:01,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 554 transitions. [2023-08-04 02:02:01,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:01,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 554 transitions. [2023-08-04 02:02:01,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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 02:02:01,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:01,447 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:01,447 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 158 flow. Second operand 4 states and 554 transitions. [2023-08-04 02:02:01,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 264 flow [2023-08-04 02:02:01,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 255 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:02:01,449 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 163 flow [2023-08-04 02:02:01,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-04 02:02:01,449 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2023-08-04 02:02:01,449 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 163 flow [2023-08-04 02:02:01,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 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 02:02:01,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:01,450 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, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:01,458 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 02:02:01,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:01,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:01,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2067200018, now seen corresponding path program 1 times [2023-08-04 02:02:01,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:01,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073876859] [2023-08-04 02:02:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:01,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:02:01,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073876859] [2023-08-04 02:02:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073876859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062536037] [2023-08-04 02:02:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:01,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:01,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:01,714 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 02:02:01,716 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 02:02:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:01,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:01,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:02:01,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 02:02:01,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062536037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:01,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:01,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988583878] [2023-08-04 02:02:01,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-04 02:02:01,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:01,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:01,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-04 02:02:01,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:02,171 INFO L124 PetriNetUnfolderBase]: 542/1060 cut-off events. [2023-08-04 02:02:02,171 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 02:02:02,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1060 events. 542/1060 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4453 event pairs, 223 based on Foata normal form. 32/1087 useless extension candidates. Maximal degree in co-relation 1905. Up to 470 conditions per place. [2023-08-04 02:02:02,175 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 45 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-04 02:02:02,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 298 flow [2023-08-04 02:02:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:02,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-04 02:02:02,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49381625441696114 [2023-08-04 02:02:02,177 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:02,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 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 02:02:02,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:02,180 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:02,180 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 163 flow. Second operand 4 states and 559 transitions. [2023-08-04 02:02:02,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 298 flow [2023-08-04 02:02:02,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 288 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:02:02,182 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 174 flow [2023-08-04 02:02:02,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-04 02:02:02,183 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2023-08-04 02:02:02,183 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 174 flow [2023-08-04 02:02:02,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:02:02,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:02,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:02,189 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 02:02:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:02,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:02,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash -588925351, now seen corresponding path program 1 times [2023-08-04 02:02:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:02,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999930139] [2023-08-04 02:02:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:02,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:02:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999930139] [2023-08-04 02:02:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999930139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58767639] [2023-08-04 02:02:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:02,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:02,452 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 02:02:02,455 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 02:02:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:02,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:02:02,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:02:02,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 02:02:02,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58767639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:02,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:02,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:02:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782670789] [2023-08-04 02:02:02,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:02,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:02:02,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:02:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:02:02,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 283 [2023-08-04 02:02:02,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 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 02:02:02,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:02,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 283 [2023-08-04 02:02:02,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:02,946 INFO L124 PetriNetUnfolderBase]: 530/1025 cut-off events. [2023-08-04 02:02:02,946 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 02:02:02,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1025 events. 530/1025 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4242 event pairs, 439 based on Foata normal form. 9/1029 useless extension candidates. Maximal degree in co-relation 2086. Up to 751 conditions per place. [2023-08-04 02:02:02,950 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 45 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2023-08-04 02:02:02,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 310 flow [2023-08-04 02:02:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-04 02:02:02,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49381625441696114 [2023-08-04 02:02:02,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:02,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-04 02:02:02,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 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 02:02:02,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:02,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 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 02:02:02,953 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 174 flow. Second operand 4 states and 559 transitions. [2023-08-04 02:02:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 310 flow [2023-08-04 02:02:02,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 306 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:02:02,955 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 178 flow [2023-08-04 02:02:02,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-04 02:02:02,956 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-08-04 02:02:02,956 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 178 flow [2023-08-04 02:02:02,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.8) internal successors, (669), 5 states have internal predecessors, (669), 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 02:02:02,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:02,956 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:02,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:03,161 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,SelfDestructingSolverStorable13 [2023-08-04 02:02:03,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:03,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 496532372, now seen corresponding path program 1 times [2023-08-04 02:02:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:03,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135003849] [2023-08-04 02:02:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:02:06,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135003849] [2023-08-04 02:02:06,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135003849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927856800] [2023-08-04 02:02:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:06,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:06,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:06,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:06,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:02:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:06,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 02:02:06,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:02:08,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:02:10,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927856800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:10,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:10,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-08-04 02:02:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553222908] [2023-08-04 02:02:10,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:10,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 02:02:10,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 02:02:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-04 02:02:10,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 283 [2023-08-04 02:02:10,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 105.6923076923077) internal successors, (1374), 13 states have internal predecessors, (1374), 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 02:02:10,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:10,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 283 [2023-08-04 02:02:10,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:11,426 INFO L124 PetriNetUnfolderBase]: 725/1392 cut-off events. [2023-08-04 02:02:11,426 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2023-08-04 02:02:11,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3645 conditions, 1392 events. 725/1392 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6907 event pairs, 108 based on Foata normal form. 1/1381 useless extension candidates. Maximal degree in co-relation 3441. Up to 670 conditions per place. [2023-08-04 02:02:11,433 INFO L140 encePairwiseOnDemand]: 276/283 looper letters, 44 selfloop transitions, 2 changer transitions 37/87 dead transitions. [2023-08-04 02:02:11,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 87 transitions, 579 flow [2023-08-04 02:02:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:02:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:02:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 680 transitions. [2023-08-04 02:02:11,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004711425206125 [2023-08-04 02:02:11,436 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 680 transitions. [2023-08-04 02:02:11,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 680 transitions. [2023-08-04 02:02:11,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:11,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 680 transitions. [2023-08-04 02:02:11,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.33333333333333) internal successors, (680), 6 states have internal predecessors, (680), 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 02:02:11,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 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 02:02:11,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 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 02:02:11,440 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 178 flow. Second operand 6 states and 680 transitions. [2023-08-04 02:02:11,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 87 transitions, 579 flow [2023-08-04 02:02:11,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 559 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:02:11,446 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 196 flow [2023-08-04 02:02:11,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 02:02:11,446 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-08-04 02:02:11,446 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 196 flow [2023-08-04 02:02:11,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 105.6923076923077) internal successors, (1374), 13 states have internal predecessors, (1374), 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 02:02:11,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:11,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:11,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:11,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:02:11,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:11,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1428908656, now seen corresponding path program 1 times [2023-08-04 02:02:11,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:11,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412389707] [2023-08-04 02:02:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:02:12,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412389707] [2023-08-04 02:02:12,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412389707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:02:12,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843849747] [2023-08-04 02:02:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:02:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:02:12,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:02:12,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:02:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:12,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 02:02:12,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:02:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:02:13,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:02:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 02:02:15,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843849747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:02:15,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:02:15,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 19 [2023-08-04 02:02:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800679088] [2023-08-04 02:02:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:02:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 02:02:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 02:02:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2023-08-04 02:02:16,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 283 [2023-08-04 02:02:16,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 196 flow. Second operand has 19 states, 19 states have (on average 88.36842105263158) internal successors, (1679), 19 states have internal predecessors, (1679), 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 02:02:16,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:16,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 283 [2023-08-04 02:02:16,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:17,502 INFO L124 PetriNetUnfolderBase]: 287/690 cut-off events. [2023-08-04 02:02:17,502 INFO L125 PetriNetUnfolderBase]: For 778/778 co-relation queries the response was YES. [2023-08-04 02:02:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 690 events. 287/690 cut-off events. For 778/778 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3160 event pairs, 30 based on Foata normal form. 7/693 useless extension candidates. Maximal degree in co-relation 2185. Up to 325 conditions per place. [2023-08-04 02:02:17,504 INFO L140 encePairwiseOnDemand]: 263/283 looper letters, 0 selfloop transitions, 0 changer transitions 120/120 dead transitions. [2023-08-04 02:02:17,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 823 flow [2023-08-04 02:02:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 02:02:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 02:02:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2121 transitions. [2023-08-04 02:02:17,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3122791519434629 [2023-08-04 02:02:17,508 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2121 transitions. [2023-08-04 02:02:17,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2121 transitions. [2023-08-04 02:02:17,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:17,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2121 transitions. [2023-08-04 02:02:17,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.375) internal successors, (2121), 24 states have internal predecessors, (2121), 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 02:02:17,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 283.0) internal successors, (7075), 25 states have internal predecessors, (7075), 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 02:02:17,517 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 283.0) internal successors, (7075), 25 states have internal predecessors, (7075), 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 02:02:17,517 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 196 flow. Second operand 24 states and 2121 transitions. [2023-08-04 02:02:17,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 823 flow [2023-08-04 02:02:17,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 795 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:02:17,520 INFO L231 Difference]: Finished difference. Result has 78 places, 0 transitions, 0 flow [2023-08-04 02:02:17,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=0, PETRI_PLACES=78, PETRI_TRANSITIONS=0} [2023-08-04 02:02:17,521 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2023-08-04 02:02:17,521 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 0 transitions, 0 flow [2023-08-04 02:02:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 88.36842105263158) internal successors, (1679), 19 states have internal predecessors, (1679), 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 02:02:17,521 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:02:17,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:02:17,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 02:02:17,727 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:02:17,727 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:02:17,727 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:02:17,727 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:02:17,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:02:17 BasicIcfg [2023-08-04 02:02:17,731 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:02:17,731 INFO L158 Benchmark]: Toolchain (without parser) took 44880.56ms. Allocated memory was 534.8MB in the beginning and 1.4GB in the end (delta: 882.9MB). Free memory was 493.2MB in the beginning and 612.7MB in the end (delta: -119.6MB). Peak memory consumption was 764.8MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,731 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 356.5MB. Free memory is still 305.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:02:17,731 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.99ms. Allocated memory is still 534.8MB. Free memory was 492.7MB in the beginning and 481.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.60ms. Allocated memory is still 534.8MB. Free memory was 481.0MB in the beginning and 478.5MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,732 INFO L158 Benchmark]: Boogie Preprocessor took 23.98ms. Allocated memory is still 534.8MB. Free memory was 478.5MB in the beginning and 476.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,732 INFO L158 Benchmark]: RCFGBuilder took 749.08ms. Allocated memory is still 534.8MB. Free memory was 476.4MB in the beginning and 450.9MB in the end (delta: 25.5MB). Peak memory consumption was 65.8MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,732 INFO L158 Benchmark]: TraceAbstraction took 43889.76ms. Allocated memory was 534.8MB in the beginning and 1.4GB in the end (delta: 882.9MB). Free memory was 449.7MB in the beginning and 612.7MB in the end (delta: -163.0MB). Peak memory consumption was 720.0MB. Max. memory is 16.0GB. [2023-08-04 02:02:17,733 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 356.5MB. Free memory is still 305.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 173.99ms. Allocated memory is still 534.8MB. Free memory was 492.7MB in the beginning and 481.0MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.60ms. Allocated memory is still 534.8MB. Free memory was 481.0MB in the beginning and 478.5MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.98ms. Allocated memory is still 534.8MB. Free memory was 478.5MB in the beginning and 476.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 749.08ms. Allocated memory is still 534.8MB. Free memory was 476.4MB in the beginning and 450.9MB in the end (delta: 25.5MB). Peak memory consumption was 65.8MB. Max. memory is 16.0GB. * TraceAbstraction took 43889.76ms. Allocated memory was 534.8MB in the beginning and 1.4GB in the end (delta: 882.9MB). Free memory was 449.7MB in the beginning and 612.7MB in the end (delta: -163.0MB). Peak memory consumption was 720.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 97 PlacesBefore, 16 PlacesAfterwards, 93 TransitionsBefore, 11 TransitionsAfterwards, 222 CoEnabledTransitionPairs, 7 FixpointIterations, 61 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 86 TotalNumberOfCompositions, 173 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 173, independent: 173, independent conditional: 0, independent unconditional: 173, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 113, independent: 113, independent conditional: 0, independent unconditional: 113, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 173, independent: 60, independent conditional: 0, independent unconditional: 60, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 113, unknown conditional: 0, unknown unconditional: 113] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 4, Positive conditional cache size: 0, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.3s, 109 PlacesBefore, 26 PlacesAfterwards, 101 TransitionsBefore, 17 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 8 FixpointIterations, 61 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 88 TotalNumberOfCompositions, 631 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 592, independent: 586, independent conditional: 0, independent unconditional: 586, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 321, independent: 317, independent conditional: 0, independent unconditional: 317, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 592, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 321, unknown conditional: 0, unknown unconditional: 321] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 14, Positive conditional cache size: 0, Positive unconditional cache size: 14, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.6s, 141 PlacesBefore, 36 PlacesAfterwards, 147 TransitionsBefore, 36 TransitionsAfterwards, 1608 CoEnabledTransitionPairs, 7 FixpointIterations, 61 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 6 ChoiceCompositions, 126 TotalNumberOfCompositions, 4116 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2454, independent: 2374, independent conditional: 0, independent unconditional: 2374, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 876, independent: 858, independent conditional: 0, independent unconditional: 858, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2454, independent: 1516, independent conditional: 0, independent unconditional: 1516, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 876, unknown conditional: 0, unknown unconditional: 876] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 87]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 143 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: 6.5s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24 IncrementalHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 24 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=40occurred 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, 151 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: 8.5s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 96 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 171 IncrementalHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 0 mSDtfsCounter, 171 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred 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, 0.2s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 39/42 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, 151 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: 28.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 908 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 777 mSDsluCounter, 1791 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1777 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2770 IncrementalHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 14 mSDtfsCounter, 2770 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 522 GetRequests, 444 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=9, InterpolantAutomatonStates: 58, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 519 NumberOfCodeBlocks, 519 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 705 ConstructedInterpolants, 0 QuantifiedInterpolants, 8723 SizeOfPredicates, 74 NumberOfNonLiveVariables, 1480 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 244/279 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:02:17,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...