/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-ext_18_read_write_lock_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 05:24:18,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 05:24:18,162 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 05:24:18,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 05:24:18,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 05:24:18,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 05:24:18,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 05:24:18,195 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 05:24:18,196 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 05:24:18,200 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 05:24:18,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 05:24:18,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 05:24:18,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 05:24:18,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 05:24:18,202 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 05:24:18,203 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 05:24:18,203 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 05:24:18,203 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 05:24:18,203 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 05:24:18,203 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 05:24:18,204 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 05:24:18,204 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 05:24:18,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 05:24:18,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 05:24:18,205 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 05:24:18,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 05:24:18,205 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 05:24:18,206 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 05:24:18,206 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 05:24:18,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 05:24:18,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:24:18,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 05:24:18,207 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 05:24:18,207 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 05:24:18,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 05:24:18,208 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 05:24:18,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 05:24:18,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 05:24:18,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 05:24:18,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 05:24:18,483 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 05:24:18,484 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 05:24:18,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-ext_18_read_write_lock_bound2.i [2023-08-04 05:24:19,710 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 05:24:19,969 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 05:24:19,970 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-ext_18_read_write_lock_bound2.i [2023-08-04 05:24:19,981 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6577fa53e/9d07470f955740f98693954b8ba8448f/FLAGddb18f39d [2023-08-04 05:24:19,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6577fa53e/9d07470f955740f98693954b8ba8448f [2023-08-04 05:24:19,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 05:24:19,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 05:24:19,997 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 05:24:19,997 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 05:24:20,002 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 05:24:20,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:24:19" (1/1) ... [2023-08-04 05:24:20,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9f79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20, skipping insertion in model container [2023-08-04 05:24:20,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:24:19" (1/1) ... [2023-08-04 05:24:20,055 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 05:24:20,214 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 05:24:20,359 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-ext_18_read_write_lock_bound2.i[31161,31174] [2023-08-04 05:24:20,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:24:20,376 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 05:24:20,400 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 05:24:20,405 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-04 05:24:20,407 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-04 05:24:20,430 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-ext_18_read_write_lock_bound2.i[31161,31174] [2023-08-04 05:24:20,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:24:20,471 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:24:20,472 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:24:20,472 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:24:20,478 INFO L206 MainTranslator]: Completed translation [2023-08-04 05:24:20,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20 WrapperNode [2023-08-04 05:24:20,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 05:24:20,480 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 05:24:20,480 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 05:24:20,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 05:24:20,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,537 INFO L138 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 86 [2023-08-04 05:24:20,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 05:24:20,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 05:24:20,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 05:24:20,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 05:24:20,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 05:24:20,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 05:24:20,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 05:24:20,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 05:24:20,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (1/1) ... [2023-08-04 05:24:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:24:20,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:24:20,608 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 05:24:20,612 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 05:24:20,644 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 05:24:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 05:24:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 05:24:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 05:24:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 05:24:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 05:24:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 05:24:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 05:24:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 05:24:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 05:24:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 05:24:20,649 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 05:24:20,769 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 05:24:20,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 05:24:20,886 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 05:24:20,937 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 05:24:20,937 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-04 05:24:20,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:24:20 BoogieIcfgContainer [2023-08-04 05:24:20,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 05:24:20,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 05:24:20,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 05:24:20,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 05:24:20,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 05:24:19" (1/3) ... [2023-08-04 05:24:20,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16169f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:24:20, skipping insertion in model container [2023-08-04 05:24:20,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:24:20" (2/3) ... [2023-08-04 05:24:20,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16169f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:24:20, skipping insertion in model container [2023-08-04 05:24:20,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:24:20" (3/3) ... [2023-08-04 05:24:20,946 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_18_read_write_lock_bound2.i [2023-08-04 05:24:20,957 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 05:24:20,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 05:24:20,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 05:24:20,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 05:24:21,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:24:21,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 58 transitions, 121 flow [2023-08-04 05:24:21,104 INFO L124 PetriNetUnfolderBase]: 4/88 cut-off events. [2023-08-04 05:24:21,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:21,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 88 events. 4/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-08-04 05:24:21,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 58 transitions, 121 flow [2023-08-04 05:24:21,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 91 flow [2023-08-04 05:24:21,115 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:24:21,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 46 places, 44 transitions, 91 flow [2023-08-04 05:24:21,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 46 places, 44 transitions, 91 flow [2023-08-04 05:24:21,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 91 flow [2023-08-04 05:24:21,140 INFO L124 PetriNetUnfolderBase]: 2/61 cut-off events. [2023-08-04 05:24:21,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:21,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 61 events. 2/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 32. Up to 4 conditions per place. [2023-08-04 05:24:21,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 264 [2023-08-04 05:24:22,278 INFO L134 LiptonReduction]: Checked pairs total: 459 [2023-08-04 05:24:22,278 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-08-04 05:24:22,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:24:22,303 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;@5a6fed3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:24:22,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 05:24:22,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:24:22,309 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-04 05:24:22,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:22,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:22,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 05:24:22,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:22,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash 7909588, now seen corresponding path program 1 times [2023-08-04 05:24:22,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:22,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640317325] [2023-08-04 05:24:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:22,523 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 05:24:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:22,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640317325] [2023-08-04 05:24:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640317325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:22,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:24:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711103764] [2023-08-04 05:24:22,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:24:22,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:24:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:24:22,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 93 [2023-08-04 05:24:22,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 23 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 05:24:22,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:22,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 93 [2023-08-04 05:24:22,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:22,629 INFO L124 PetriNetUnfolderBase]: 10/31 cut-off events. [2023-08-04 05:24:22,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:22,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 31 events. 10/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 4 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 55. Up to 26 conditions per place. [2023-08-04 05:24:22,631 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 9 selfloop transitions, 2 changer transitions 1/13 dead transitions. [2023-08-04 05:24:22,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 13 transitions, 53 flow [2023-08-04 05:24:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:24:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:24:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-08-04 05:24:22,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627240143369175 [2023-08-04 05:24:22,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-08-04 05:24:22,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-08-04 05:24:22,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:22,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-08-04 05:24:22,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 05:24:22,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 05:24:22,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 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 05:24:22,663 INFO L175 Difference]: Start difference. First operand has 13 places, 10 transitions, 23 flow. Second operand 3 states and 157 transitions. [2023-08-04 05:24:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 13 transitions, 53 flow [2023-08-04 05:24:22,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 13 transitions, 53 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 05:24:22,668 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 31 flow [2023-08-04 05:24:22,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-08-04 05:24:22,673 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, 3 predicate places. [2023-08-04 05:24:22,674 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 31 flow [2023-08-04 05:24:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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 05:24:22,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:22,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:24:22,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 05:24:22,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:22,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash -793344160, now seen corresponding path program 1 times [2023-08-04 05:24:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:22,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804644456] [2023-08-04 05:24:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:22,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:22,772 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 05:24:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804644456] [2023-08-04 05:24:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804644456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:24:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502525901] [2023-08-04 05:24:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:24:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:24:22,776 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 05:24:22,798 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 05:24:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:22,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 05:24:22,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:24:22,900 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 05:24:22,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 05:24:22,916 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 05:24:22,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502525901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 05:24:22,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 05:24:22,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 05:24:22,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598341401] [2023-08-04 05:24:22,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 05:24:22,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 05:24:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 05:24:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 05:24:22,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 93 [2023-08-04 05:24:22,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 05:24:22,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:22,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 93 [2023-08-04 05:24:22,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:22,966 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 05:24:22,966 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 05:24:22,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 31. Up to 10 conditions per place. [2023-08-04 05:24:22,968 INFO L140 encePairwiseOnDemand]: 90/93 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 05:24:22,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 47 flow [2023-08-04 05:24:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:24:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:24:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2023-08-04 05:24:22,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2023-08-04 05:24:22,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2023-08-04 05:24:22,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2023-08-04 05:24:22,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:22,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2023-08-04 05:24:22,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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 05:24:22,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 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 05:24:22,983 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 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 05:24:22,983 INFO L175 Difference]: Start difference. First operand has 16 places, 10 transitions, 31 flow. Second operand 4 states and 198 transitions. [2023-08-04 05:24:22,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 47 flow [2023-08-04 05:24:22,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 05:24:22,985 INFO L231 Difference]: Finished difference. Result has 13 places, 0 transitions, 0 flow [2023-08-04 05:24:22,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=13, PETRI_TRANSITIONS=0} [2023-08-04 05:24:22,985 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, 0 predicate places. [2023-08-04 05:24:22,986 INFO L495 AbstractCegarLoop]: Abstraction has has 13 places, 0 transitions, 0 flow [2023-08-04 05:24:22,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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 05:24:22,988 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 05:24:22,997 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 05:24:23,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:24:23,196 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 05:24:23,198 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 05:24:23,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 58 transitions, 121 flow [2023-08-04 05:24:23,215 INFO L124 PetriNetUnfolderBase]: 4/88 cut-off events. [2023-08-04 05:24:23,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:23,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 88 events. 4/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2023-08-04 05:24:23,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 58 transitions, 121 flow [2023-08-04 05:24:23,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 69 flow [2023-08-04 05:24:23,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:24:23,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 35 places, 32 transitions, 69 flow [2023-08-04 05:24:23,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 35 places, 32 transitions, 69 flow [2023-08-04 05:24:23,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 32 transitions, 69 flow [2023-08-04 05:24:23,222 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2023-08-04 05:24:23,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:23,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-04 05:24:23,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 120 [2023-08-04 05:24:24,447 INFO L134 LiptonReduction]: Checked pairs total: 83 [2023-08-04 05:24:24,447 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-08-04 05:24:24,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 05:24:24,450 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;@5a6fed3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:24:24,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 05:24:24,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:24:24,452 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-04 05:24:24,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:24,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 05:24:24,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 05:24:24,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 8742594, now seen corresponding path program 1 times [2023-08-04 05:24:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821580218] [2023-08-04 05:24:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:24:24,471 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 05:24:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:24:24,498 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 05:24:24,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 05:24:24,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 05:24:24,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 05:24:24,499 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 05:24:24,500 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 05:24:24,502 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 05:24:24,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 05:24:24,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:24:24,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 142 flow [2023-08-04 05:24:24,532 INFO L124 PetriNetUnfolderBase]: 6/130 cut-off events. [2023-08-04 05:24:24,532 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 05:24:24,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 130 events. 6/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-04 05:24:24,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 65 transitions, 142 flow [2023-08-04 05:24:24,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 51 transitions, 110 flow [2023-08-04 05:24:24,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:24:24,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 51 transitions, 110 flow [2023-08-04 05:24:24,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 51 transitions, 110 flow [2023-08-04 05:24:24,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 51 transitions, 110 flow [2023-08-04 05:24:24,543 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-08-04 05:24:24,543 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 05:24:24,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 90 events. 3/90 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 63. Up to 6 conditions per place. [2023-08-04 05:24:24,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 612 [2023-08-04 05:24:25,587 INFO L134 LiptonReduction]: Checked pairs total: 1183 [2023-08-04 05:24:25,587 INFO L136 LiptonReduction]: Total number of compositions: 37 [2023-08-04 05:24:25,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:24:25,590 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;@5a6fed3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:24:25,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 05:24:25,593 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:24:25,593 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-04 05:24:25,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:24:25,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:25,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 05:24:25,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:25,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash 12157753, now seen corresponding path program 1 times [2023-08-04 05:24:25,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:25,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573410388] [2023-08-04 05:24:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:25,645 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 05:24:25,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573410388] [2023-08-04 05:24:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573410388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:25,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:25,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:24:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383801126] [2023-08-04 05:24:25,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:25,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:24:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:24:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:24:25,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 102 [2023-08-04 05:24:25,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 05:24:25,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:25,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 102 [2023-08-04 05:24:25,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:25,701 INFO L124 PetriNetUnfolderBase]: 76/170 cut-off events. [2023-08-04 05:24:25,701 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 05:24:25,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 170 events. 76/170 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 650 event pairs, 30 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 97. Up to 146 conditions per place. [2023-08-04 05:24:25,705 INFO L140 encePairwiseOnDemand]: 99/102 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-04 05:24:25,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 78 flow [2023-08-04 05:24:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:24:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:24:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-08-04 05:24:25,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5751633986928104 [2023-08-04 05:24:25,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-08-04 05:24:25,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-08-04 05:24:25,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:25,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-08-04 05:24:25,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 05:24:25,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:25,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:25,713 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 176 transitions. [2023-08-04 05:24:25,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 78 flow [2023-08-04 05:24:25,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 05:24:25,714 INFO L231 Difference]: Finished difference. Result has 23 places, 16 transitions, 50 flow [2023-08-04 05:24:25,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2023-08-04 05:24:25,716 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 05:24:25,716 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 50 flow [2023-08-04 05:24:25,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 05:24:25,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:25,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:24:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 05:24:25,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:25,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -546663810, now seen corresponding path program 1 times [2023-08-04 05:24:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667756709] [2023-08-04 05:24:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:25,799 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 05:24:25,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:25,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667756709] [2023-08-04 05:24:25,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667756709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:24:25,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125790208] [2023-08-04 05:24:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:25,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:24:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:24:25,805 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 05:24:25,819 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 05:24:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:25,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 05:24:25,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:24:25,906 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 05:24:25,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 05:24:25,921 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 05:24:25,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125790208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 05:24:25,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 05:24:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 05:24:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075022022] [2023-08-04 05:24:25,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 05:24:25,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 05:24:25,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 05:24:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:24:25,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2023-08-04 05:24:25,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:25,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:25,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2023-08-04 05:24:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:25,995 INFO L124 PetriNetUnfolderBase]: 70/146 cut-off events. [2023-08-04 05:24:25,995 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 05:24:25,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 146 events. 70/146 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 527 event pairs, 6 based on Foata normal form. 3/148 useless extension candidates. Maximal degree in co-relation 111. Up to 85 conditions per place. [2023-08-04 05:24:25,999 INFO L140 encePairwiseOnDemand]: 98/102 looper letters, 17 selfloop transitions, 3 changer transitions 1/24 dead transitions. [2023-08-04 05:24:25,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 108 flow [2023-08-04 05:24:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:24:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:24:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2023-08-04 05:24:26,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-08-04 05:24:26,001 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 230 transitions. [2023-08-04 05:24:26,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 230 transitions. [2023-08-04 05:24:26,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:26,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 230 transitions. [2023-08-04 05:24:26,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 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 05:24:26,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 05:24:26,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 05:24:26,004 INFO L175 Difference]: Start difference. First operand has 23 places, 16 transitions, 50 flow. Second operand 4 states and 230 transitions. [2023-08-04 05:24:26,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 108 flow [2023-08-04 05:24:26,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 05:24:26,005 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 62 flow [2023-08-04 05:24:26,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-08-04 05:24:26,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-04 05:24:26,008 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 62 flow [2023-08-04 05:24:26,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.2) internal successors, (271), 5 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:26,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:26,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 05:24:26,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 05:24:26,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:24:26,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:26,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:26,218 INFO L85 PathProgramCache]: Analyzing trace with hash -696430622, now seen corresponding path program 1 times [2023-08-04 05:24:26,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:26,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596665957] [2023-08-04 05:24:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 05:24:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596665957] [2023-08-04 05:24:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596665957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:26,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:26,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:24:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052765847] [2023-08-04 05:24:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:24:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:24:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:24:26,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 102 [2023-08-04 05:24:26,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 05:24:26,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:26,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 102 [2023-08-04 05:24:26,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:26,308 INFO L124 PetriNetUnfolderBase]: 110/215 cut-off events. [2023-08-04 05:24:26,308 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-04 05:24:26,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 544 conditions, 215 events. 110/215 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 769 event pairs, 38 based on Foata normal form. 16/230 useless extension candidates. Maximal degree in co-relation 341. Up to 149 conditions per place. [2023-08-04 05:24:26,309 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 23 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-04 05:24:26,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 162 flow [2023-08-04 05:24:26,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:24:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:24:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-08-04 05:24:26,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2023-08-04 05:24:26,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:26,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 05:24:26,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:26,313 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 62 flow. Second operand 3 states and 182 transitions. [2023-08-04 05:24:26,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 162 flow [2023-08-04 05:24:26,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 150 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 05:24:26,317 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 85 flow [2023-08-04 05:24:26,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-08-04 05:24:26,320 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-04 05:24:26,320 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 85 flow [2023-08-04 05:24:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 05:24:26,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:26,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:24:26,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 05:24:26,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:26,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 200461418, now seen corresponding path program 1 times [2023-08-04 05:24:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:26,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331296558] [2023-08-04 05:24:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 05:24:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331296558] [2023-08-04 05:24:26,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331296558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:26,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:26,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 05:24:26,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143253984] [2023-08-04 05:24:26,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:26,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:24:26,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:24:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:24:26,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 102 [2023-08-04 05:24:26,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 05:24:26,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:26,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 102 [2023-08-04 05:24:26,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:26,458 INFO L124 PetriNetUnfolderBase]: 38/121 cut-off events. [2023-08-04 05:24:26,458 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-08-04 05:24:26,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 121 events. 38/121 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 462 event pairs, 15 based on Foata normal form. 16/137 useless extension candidates. Maximal degree in co-relation 185. Up to 52 conditions per place. [2023-08-04 05:24:26,459 INFO L140 encePairwiseOnDemand]: 97/102 looper letters, 17 selfloop transitions, 4 changer transitions 0/26 dead transitions. [2023-08-04 05:24:26,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 162 flow [2023-08-04 05:24:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:24:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:24:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-08-04 05:24:26,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2023-08-04 05:24:26,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:26,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-08-04 05:24:26,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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 05:24:26,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:26,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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 05:24:26,463 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 85 flow. Second operand 3 states and 182 transitions. [2023-08-04 05:24:26,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 162 flow [2023-08-04 05:24:26,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:24:26,465 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 91 flow [2023-08-04 05:24:26,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-04 05:24:26,466 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-08-04 05:24:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 91 flow [2023-08-04 05:24:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 05:24:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:26,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:24:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 05:24:26,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:24:26,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 745062516, now seen corresponding path program 2 times [2023-08-04 05:24:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290691262] [2023-08-04 05:24:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 05:24:26,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:26,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290691262] [2023-08-04 05:24:26,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290691262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:26,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:26,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 05:24:26,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777893324] [2023-08-04 05:24:26,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:26,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 05:24:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 05:24:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 05:24:26,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2023-08-04 05:24:26,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:26,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:26,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2023-08-04 05:24:26,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:26,593 INFO L124 PetriNetUnfolderBase]: 15/63 cut-off events. [2023-08-04 05:24:26,593 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 05:24:26,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 63 events. 15/63 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 176 event pairs, 13 based on Foata normal form. 8/70 useless extension candidates. Maximal degree in co-relation 137. Up to 42 conditions per place. [2023-08-04 05:24:26,593 INFO L140 encePairwiseOnDemand]: 98/102 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 05:24:26,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 18 transitions, 113 flow [2023-08-04 05:24:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:24:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:24:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-08-04 05:24:26,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571078431372549 [2023-08-04 05:24:26,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-08-04 05:24:26,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-08-04 05:24:26,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:26,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-08-04 05:24:26,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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 05:24:26,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 05:24:26,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 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 05:24:26,597 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 91 flow. Second operand 4 states and 233 transitions. [2023-08-04 05:24:26,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 18 transitions, 113 flow [2023-08-04 05:24:26,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 18 transitions, 105 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:24:26,598 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-04 05:24:26,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-04 05:24:26,599 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-08-04 05:24:26,599 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-04 05:24:26,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:26,599 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 05:24:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 05:24:26,599 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-04 05:24:26,600 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 05:24:26,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 65 transitions, 142 flow [2023-08-04 05:24:26,611 INFO L124 PetriNetUnfolderBase]: 6/130 cut-off events. [2023-08-04 05:24:26,611 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 05:24:26,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 130 events. 6/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-08-04 05:24:26,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 65 transitions, 142 flow [2023-08-04 05:24:26,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 39 transitions, 90 flow [2023-08-04 05:24:26,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:24:26,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 39 transitions, 90 flow [2023-08-04 05:24:26,612 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 39 transitions, 90 flow [2023-08-04 05:24:26,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 39 transitions, 90 flow [2023-08-04 05:24:26,616 INFO L124 PetriNetUnfolderBase]: 0/52 cut-off events. [2023-08-04 05:24:26,616 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 05:24:26,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 52 events. 0/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 23 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-04 05:24:26,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 324 [2023-08-04 05:24:27,655 INFO L134 LiptonReduction]: Checked pairs total: 623 [2023-08-04 05:24:27,655 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-08-04 05:24:27,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 05:24:27,657 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;@5a6fed3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:24:27,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 05:24:27,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:24:27,659 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 05:24:27,659 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 05:24:27,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:24:27,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-04 05:24:27,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 05:24:27,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:24:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash -314794948, now seen corresponding path program 1 times [2023-08-04 05:24:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:24:27,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229165408] [2023-08-04 05:24:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:24:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:24:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:24:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 05:24:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:24:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229165408] [2023-08-04 05:24:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229165408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:24:27,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:24:27,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 05:24:27,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711549274] [2023-08-04 05:24:27,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:24:27,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 05:24:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:24:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 05:24:27,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 05:24:27,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2023-08-04 05:24:27,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 12 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:27,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:24:27,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2023-08-04 05:24:27,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:24:27,726 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-08-04 05:24:27,726 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 05:24:27,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 32 events. 8/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 62 event pairs, 0 based on Foata normal form. 9/40 useless extension candidates. Maximal degree in co-relation 22. Up to 20 conditions per place. [2023-08-04 05:24:27,727 INFO L140 encePairwiseOnDemand]: 92/94 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 05:24:27,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 54 flow [2023-08-04 05:24:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:24:27,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:24:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2023-08-04 05:24:27,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930851063829787 [2023-08-04 05:24:27,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 223 transitions. [2023-08-04 05:24:27,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 223 transitions. [2023-08-04 05:24:27,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:24:27,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 223 transitions. [2023-08-04 05:24:27,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 05:24:27,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 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 05:24:27,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 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 05:24:27,730 INFO L175 Difference]: Start difference. First operand has 17 places, 12 transitions, 36 flow. Second operand 4 states and 223 transitions. [2023-08-04 05:24:27,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 54 flow [2023-08-04 05:24:27,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 05:24:27,730 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 05:24:27,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 05:24:27,732 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-08-04 05:24:27,732 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 05:24:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:24:27,732 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 05:24:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 05:24:27,732 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 05:24:27,733 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 05:24:27,733 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 05:24:27,733 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 05:24:27,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 05:24:27 BasicIcfg [2023-08-04 05:24:27,738 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 05:24:27,739 INFO L158 Benchmark]: Toolchain (without parser) took 7742.91ms. Allocated memory is still 515.9MB. Free memory was 467.5MB in the beginning and 276.5MB in the end (delta: 191.0MB). Peak memory consumption was 193.8MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,739 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 362.8MB. Free memory is still 315.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 05:24:27,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.90ms. Allocated memory is still 515.9MB. Free memory was 467.2MB in the beginning and 447.0MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,739 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.71ms. Allocated memory is still 515.9MB. Free memory was 447.0MB in the beginning and 444.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,740 INFO L158 Benchmark]: Boogie Preprocessor took 42.69ms. Allocated memory is still 515.9MB. Free memory was 444.9MB in the beginning and 443.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,740 INFO L158 Benchmark]: RCFGBuilder took 358.44ms. Allocated memory is still 515.9MB. Free memory was 443.7MB in the beginning and 428.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,740 INFO L158 Benchmark]: TraceAbstraction took 6797.09ms. Allocated memory is still 515.9MB. Free memory was 427.7MB in the beginning and 276.5MB in the end (delta: 151.2MB). Peak memory consumption was 154.0MB. Max. memory is 16.0GB. [2023-08-04 05:24:27,742 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 362.8MB. Free memory is still 315.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 481.90ms. Allocated memory is still 515.9MB. Free memory was 467.2MB in the beginning and 447.0MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.71ms. Allocated memory is still 515.9MB. Free memory was 447.0MB in the beginning and 444.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.69ms. Allocated memory is still 515.9MB. Free memory was 444.9MB in the beginning and 443.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 358.44ms. Allocated memory is still 515.9MB. Free memory was 443.7MB in the beginning and 428.1MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 6797.09ms. Allocated memory is still 515.9MB. Free memory was 427.7MB in the beginning and 276.5MB in the end (delta: 151.2MB). Peak memory consumption was 154.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 46 PlacesBefore, 13 PlacesAfterwards, 44 TransitionsBefore, 10 TransitionsAfterwards, 264 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 35 TotalNumberOfCompositions, 459 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 275, independent: 229, independent conditional: 0, independent unconditional: 229, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 146, independent: 135, independent conditional: 0, independent unconditional: 135, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 275, independent: 94, independent conditional: 0, independent unconditional: 94, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 146, unknown conditional: 0, unknown unconditional: 146] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 35 PlacesBefore, 8 PlacesAfterwards, 32 TransitionsBefore, 5 TransitionsAfterwards, 120 CoEnabledTransitionPairs, 6 FixpointIterations, 15 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 29 TotalNumberOfCompositions, 83 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 83, independent: 83, independent conditional: 0, independent unconditional: 83, 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: 61, independent: 61, independent conditional: 0, independent unconditional: 61, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 83, independent: 22, independent conditional: 0, independent unconditional: 22, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 61, unknown conditional: 0, unknown unconditional: 61] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.1s, 55 PlacesBefore, 20 PlacesAfterwards, 51 TransitionsBefore, 15 TransitionsAfterwards, 612 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 37 TotalNumberOfCompositions, 1183 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 554, independent: 484, independent conditional: 0, independent unconditional: 484, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 297, independent: 280, independent conditional: 0, independent unconditional: 280, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 554, independent: 204, independent conditional: 0, independent unconditional: 204, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 297, unknown conditional: 0, unknown unconditional: 297] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 17, Positive conditional cache size: 0, Positive unconditional cache size: 17, 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.0s, 44 PlacesBefore, 17 PlacesAfterwards, 39 TransitionsBefore, 12 TransitionsAfterwards, 324 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 11 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 29 TotalNumberOfCompositions, 623 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 379, independent: 333, independent conditional: 0, independent unconditional: 333, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 172, independent: 162, independent conditional: 0, independent unconditional: 162, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 379, independent: 171, independent conditional: 0, independent unconditional: 171, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 172, unknown conditional: 0, unknown unconditional: 172] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 738]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 64 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 8 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=1, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 71 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 78 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 164 IncrementalHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 1 mSDtfsCounter, 164 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 127 SizeOfPredicates, 0 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 18/21 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 1 thread instances CFG has 3 procedures, 64 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 71 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 27 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 5/5 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 05:24:27,762 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...