/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-wmm_safe034_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:29:21,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:29:21,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:29:21,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:29:21,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:29:21,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:29:21,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:29:21,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:29:21,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:29:21,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:29:21,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:29:21,440 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:29:21,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:29:21,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:29:21,440 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:29:21,441 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:29:21,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:29:21,441 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:29:21,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:29:21,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:29:21,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:29:21,443 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:29:21,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:29:21,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:29:21,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:29:21,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:29:21,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:29:21,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:29:21,444 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:29:21,445 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:29:21,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:29:21,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:29:21,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:29:21,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:29:21,645 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:29:21,645 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:29:21,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe034_tso_bound2.i [2023-08-04 07:29:22,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:29:22,801 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:29:22,801 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe034_tso_bound2.i [2023-08-04 07:29:22,814 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05ba6b85d/9add2cef0633425cb5e0703a08804a0a/FLAG742162b9f [2023-08-04 07:29:22,825 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05ba6b85d/9add2cef0633425cb5e0703a08804a0a [2023-08-04 07:29:22,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:29:22,829 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:29:22,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:29:22,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:29:22,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:29:22,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:29:22" (1/1) ... [2023-08-04 07:29:22,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e13f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:22, skipping insertion in model container [2023-08-04 07:29:22,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:29:22" (1/1) ... [2023-08-04 07:29:22,865 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:29:22,994 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe034_tso_bound2.i[945,958] [2023-08-04 07:29:23,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:29:23,146 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:29:23,154 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe034_tso_bound2.i[945,958] [2023-08-04 07:29:23,164 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:29:23,165 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:29:23,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:29:23,198 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:29:23,199 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:29:23,203 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:29:23,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23 WrapperNode [2023-08-04 07:29:23,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:29:23,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:29:23,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:29:23,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:29:23,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,250 INFO L138 Inliner]: procedures = 176, calls = 57, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-04 07:29:23,250 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:29:23,251 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:29:23,251 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:29:23,251 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:29:23,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,293 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:29:23,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:29:23,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:29:23,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:29:23,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (1/1) ... [2023-08-04 07:29:23,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:29:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:23,354 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 07:29:23,380 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 07:29:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:29:23,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:29:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:29:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:29:23,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:29:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:29:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:29:23,413 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:29:23,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:29:23,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:29:23,414 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 07:29:23,516 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:29:23,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:29:23,685 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:29:23,689 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:29:23,689 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:29:23,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:29:23 BoogieIcfgContainer [2023-08-04 07:29:23,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:29:23,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:29:23,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:29:23,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:29:23,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:29:22" (1/3) ... [2023-08-04 07:29:23,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad7138a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:29:23, skipping insertion in model container [2023-08-04 07:29:23,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:29:23" (2/3) ... [2023-08-04 07:29:23,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad7138a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:29:23, skipping insertion in model container [2023-08-04 07:29:23,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:29:23" (3/3) ... [2023-08-04 07:29:23,696 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe034_tso_bound2.i [2023-08-04 07:29:23,705 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:29:23,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:29:23,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:29:23,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:29:23,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:29:23,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 07:29:23,898 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 07:29:23,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:23,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1854 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-04 07:29:23,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 07:29:23,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 191 flow [2023-08-04 07:29:23,927 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:29:23,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 91 transitions, 191 flow [2023-08-04 07:29:23,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 91 transitions, 191 flow [2023-08-04 07:29:23,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 91 transitions, 191 flow [2023-08-04 07:29:23,976 INFO L124 PetriNetUnfolderBase]: 22/311 cut-off events. [2023-08-04 07:29:23,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:23,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 311 events. 22/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1242 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 189. Up to 16 conditions per place. [2023-08-04 07:29:23,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-08-04 07:29:25,601 INFO L134 LiptonReduction]: Checked pairs total: 2832 [2023-08-04 07:29:25,601 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 07:29:25,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:29:25,622 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;@363dcc99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:29:25,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:29:25,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:29:25,639 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:29:25,639 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:25,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:25,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:29:25,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:25,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash 354600413, now seen corresponding path program 1 times [2023-08-04 07:29:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841312026] [2023-08-04 07:29:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:25,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:25,842 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 07:29:25,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:25,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841312026] [2023-08-04 07:29:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841312026] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:25,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:29:25,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:29:25,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077458740] [2023-08-04 07:29:25,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:29:25,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 180 [2023-08-04 07:29:25,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:29:25,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:25,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 180 [2023-08-04 07:29:25,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:25,977 INFO L124 PetriNetUnfolderBase]: 400/688 cut-off events. [2023-08-04 07:29:25,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:25,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 688 events. 400/688 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3454 event pairs, 310 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 1384. Up to 668 conditions per place. [2023-08-04 07:29:25,982 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 20 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 07:29:25,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 07:29:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-04 07:29:25,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2023-08-04 07:29:25,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-04 07:29:25,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-04 07:29:25,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:25,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-04 07:29:25,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 07:29:26,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,002 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 55 flow. Second operand 3 states and 303 transitions. [2023-08-04 07:29:26,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 07:29:26,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:29:26,004 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 63 flow [2023-08-04 07:29:26,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 07:29:26,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 07:29:26,008 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 63 flow [2023-08-04 07:29:26,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:29:26,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:26,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:26,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:29:26,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:26,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash 459846807, now seen corresponding path program 1 times [2023-08-04 07:29:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864311812] [2023-08-04 07:29:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,074 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 07:29:26,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:26,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864311812] [2023-08-04 07:29:26,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864311812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:26,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876218101] [2023-08-04 07:29:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:26,077 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 07:29:26,081 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 07:29:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:29:26,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:29:26,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:29:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876218101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:26,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:29:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:29:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224923966] [2023-08-04 07:29:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:26,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:26,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:26,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 180 [2023-08-04 07:29:26,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 07:29:26,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:26,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 180 [2023-08-04 07:29:26,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:26,231 INFO L124 PetriNetUnfolderBase]: 338/568 cut-off events. [2023-08-04 07:29:26,231 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:29:26,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 568 events. 338/568 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2530 event pairs, 262 based on Foata normal form. 0/514 useless extension candidates. Maximal degree in co-relation 1148. Up to 529 conditions per place. [2023-08-04 07:29:26,235 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 22 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 07:29:26,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 123 flow [2023-08-04 07:29:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-04 07:29:26,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2023-08-04 07:29:26,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-04 07:29:26,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-04 07:29:26,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:26,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-04 07:29:26,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 07:29:26,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,249 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 63 flow. Second operand 3 states and 305 transitions. [2023-08-04 07:29:26,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 123 flow [2023-08-04 07:29:26,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 119 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:29:26,250 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 67 flow [2023-08-04 07:29:26,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-04 07:29:26,250 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-04 07:29:26,250 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 67 flow [2023-08-04 07:29:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 07:29:26,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:26,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:26,258 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 07:29:26,457 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 07:29:26,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:26,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:26,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1767629660, now seen corresponding path program 1 times [2023-08-04 07:29:26,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:26,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937827712] [2023-08-04 07:29:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:29:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937827712] [2023-08-04 07:29:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937827712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349186822] [2023-08-04 07:29:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:26,515 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 07:29:26,517 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 07:29:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:29:26,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:26,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:29:26,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349186822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:26,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:29:26,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:29:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55670198] [2023-08-04 07:29:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 180 [2023-08-04 07:29:26,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 07:29:26,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:26,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 180 [2023-08-04 07:29:26,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:26,642 INFO L124 PetriNetUnfolderBase]: 314/524 cut-off events. [2023-08-04 07:29:26,642 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 07:29:26,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 524 events. 314/524 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2275 event pairs, 182 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 1089. Up to 407 conditions per place. [2023-08-04 07:29:26,644 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 24 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 07:29:26,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 135 flow [2023-08-04 07:29:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 07:29:26,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685185185185185 [2023-08-04 07:29:26,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 07:29:26,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 07:29:26,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:26,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 07:29:26,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 07:29:26,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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 07:29:26,649 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 67 flow. Second operand 3 states and 307 transitions. [2023-08-04 07:29:26,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 135 flow [2023-08-04 07:29:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:29:26,650 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 71 flow [2023-08-04 07:29:26,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-04 07:29:26,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-04 07:29:26,651 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 71 flow [2023-08-04 07:29:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 07:29:26,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:26,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:26,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:29:26,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:29:26,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:26,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1132358299, now seen corresponding path program 1 times [2023-08-04 07:29:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520399320] [2023-08-04 07:29:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:26,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520399320] [2023-08-04 07:29:26,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520399320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845848797] [2023-08-04 07:29:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:26,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:26,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:26,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:29:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:26,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:29:26,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:27,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845848797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:27,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:27,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:29:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114758973] [2023-08-04 07:29:27,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:29:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:29:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:27,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 180 [2023-08-04 07:29:27,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 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 07:29:27,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:27,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 180 [2023-08-04 07:29:27,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:27,044 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:29:27,044 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:27,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:29:27,044 INFO L140 encePairwiseOnDemand]: 177/180 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:29:27,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:29:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:29:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:29:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-08-04 07:29:27,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2023-08-04 07:29:27,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-08-04 07:29:27,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-08-04 07:29:27,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:27,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-08-04 07:29:27,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 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 07:29:27,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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 07:29:27,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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 07:29:27,048 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 71 flow. Second operand 4 states and 378 transitions. [2023-08-04 07:29:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:29:27,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:29:27,048 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:29:27,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, 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=18, PETRI_TRANSITIONS=0} [2023-08-04 07:29:27,049 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -12 predicate places. [2023-08-04 07:29:27,049 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:29:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 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 07:29:27,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:29:27,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:29:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:27,257 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:29:27,259 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:29:27,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 07:29:27,283 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 07:29:27,283 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:27,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1854 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-04 07:29:27,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 07:29:27,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 78 transitions, 171 flow [2023-08-04 07:29:27,285 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:29:27,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 07:29:27,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 07:29:27,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 78 transitions, 171 flow [2023-08-04 07:29:27,294 INFO L124 PetriNetUnfolderBase]: 6/190 cut-off events. [2023-08-04 07:29:27,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:27,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 6/190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 585 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-04 07:29:27,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 07:29:28,588 INFO L134 LiptonReduction]: Checked pairs total: 2186 [2023-08-04 07:29:28,588 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 07:29:28,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:29:28,591 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;@363dcc99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:29:28,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:29:28,594 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:29:28,594 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 07:29:28,595 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:28,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:28,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:29:28,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:29:28,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -115225970, now seen corresponding path program 1 times [2023-08-04 07:29:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281728663] [2023-08-04 07:29:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:29:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281728663] [2023-08-04 07:29:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281728663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:28,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:29:28,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:29:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250409672] [2023-08-04 07:29:28,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:28,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:29:28,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 166 [2023-08-04 07:29:28,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:29:28,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:28,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 166 [2023-08-04 07:29:28,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:28,677 INFO L124 PetriNetUnfolderBase]: 160/351 cut-off events. [2023-08-04 07:29:28,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:28,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 351 events. 160/351 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1712 event pairs, 118 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 706. Up to 284 conditions per place. [2023-08-04 07:29:28,679 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 18 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 07:29:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 07:29:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-04 07:29:28,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024096385542169 [2023-08-04 07:29:28,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-04 07:29:28,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-04 07:29:28,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:28,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-04 07:29:28,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 07:29:28,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 07:29:28,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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 07:29:28,682 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 300 transitions. [2023-08-04 07:29:28,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 07:29:28,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:29:28,684 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 07:29:28,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 07:29:28,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 07:29:28,686 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 07:29:28,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:29:28,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:28,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:29:28,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:29:28,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:29:28,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -120970212, now seen corresponding path program 1 times [2023-08-04 07:29:28,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:28,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603975960] [2023-08-04 07:29:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:29:28,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:29:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:29:28,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:29:28,725 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:29:28,726 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:29:28,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:29:28,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:29:28,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:29:28,726 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:29:28,727 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:29:28,727 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:29:28,727 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:29:28,750 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:29:28,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 07:29:28,845 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 07:29:28,846 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:29:28,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8908 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-04 07:29:28,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 07:29:28,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 112 transitions, 248 flow [2023-08-04 07:29:28,849 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:29:28,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 07:29:28,850 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 07:29:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 112 transitions, 248 flow [2023-08-04 07:29:28,898 INFO L124 PetriNetUnfolderBase]: 66/967 cut-off events. [2023-08-04 07:29:28,899 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:29:28,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 967 events. 66/967 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6008 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 717. Up to 54 conditions per place. [2023-08-04 07:29:28,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 07:29:30,446 INFO L134 LiptonReduction]: Checked pairs total: 7933 [2023-08-04 07:29:30,446 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-04 07:29:30,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:29:30,448 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;@363dcc99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:29:30,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:29:30,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:29:30,449 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:29:30,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:29:30,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:30,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:29:30,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:30,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash 629501788, now seen corresponding path program 1 times [2023-08-04 07:29:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:30,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155432703] [2023-08-04 07:29:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:30,493 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 07:29:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155432703] [2023-08-04 07:29:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155432703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:30,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:29:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:29:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311361199] [2023-08-04 07:29:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:29:30,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 207 [2023-08-04 07:29:30,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 07:29:30,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:30,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 207 [2023-08-04 07:29:30,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:33,249 INFO L124 PetriNetUnfolderBase]: 33046/48143 cut-off events. [2023-08-04 07:29:33,249 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 07:29:33,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 48143 events. 33046/48143 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 340688 event pairs, 26064 based on Foata normal form. 0/45325 useless extension candidates. Maximal degree in co-relation 26602. Up to 43520 conditions per place. [2023-08-04 07:29:33,499 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 07:29:33,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 07:29:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 07:29:33,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909822866344605 [2023-08-04 07:29:33,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 07:29:33,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 07:29:33,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:33,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 07:29:33,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 07:29:33,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:33,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:33,504 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 100 flow. Second operand 3 states and 367 transitions. [2023-08-04 07:29:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 07:29:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:29:33,506 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 07:29:33,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 07:29:33,507 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 07:29:33,507 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 07:29:33,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 07:29:33,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:33,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:33,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:29:33,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:33,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 908725164, now seen corresponding path program 1 times [2023-08-04 07:29:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:33,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522555216] [2023-08-04 07:29:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:33,549 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 07:29:33,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522555216] [2023-08-04 07:29:33,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522555216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343818431] [2023-08-04 07:29:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:33,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:33,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:33,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:29:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:33,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:29:33,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:29:33,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:29:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343818431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:33,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:29:33,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:29:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657754664] [2023-08-04 07:29:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:33,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 207 [2023-08-04 07:29:33,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 07:29:33,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:33,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 207 [2023-08-04 07:29:33,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:35,990 INFO L124 PetriNetUnfolderBase]: 31406/45017 cut-off events. [2023-08-04 07:29:35,990 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 07:29:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87898 conditions, 45017 events. 31406/45017 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1600. Compared 310425 event pairs, 24928 based on Foata normal form. 0/42784 useless extension candidates. Maximal degree in co-relation 87861. Up to 40987 conditions per place. [2023-08-04 07:29:36,181 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 07:29:36,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 07:29:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 07:29:36,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974235104669887 [2023-08-04 07:29:36,182 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 07:29:36,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 07:29:36,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:36,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 07:29:36,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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 07:29:36,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:36,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:36,184 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 371 transitions. [2023-08-04 07:29:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 07:29:36,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:29:36,186 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 07:29:36,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 07:29:36,186 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 07:29:36,186 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 07:29:36,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 07:29:36,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:36,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:36,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:29:36,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:36,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:36,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:36,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1923343206, now seen corresponding path program 1 times [2023-08-04 07:29:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291379944] [2023-08-04 07:29:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:29:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291379944] [2023-08-04 07:29:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291379944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916311083] [2023-08-04 07:29:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:36,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:36,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:36,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:29:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:36,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:29:36,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:36,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:29:36,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916311083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:36,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:29:36,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:29:36,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173409114] [2023-08-04 07:29:36,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:36,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:36,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:36,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 207 [2023-08-04 07:29:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 07:29:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 207 [2023-08-04 07:29:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:38,885 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 07:29:38,886 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 07:29:38,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290633 event pairs, 23582 based on Foata normal form. 0/41626 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 07:29:39,067 INFO L140 encePairwiseOnDemand]: 204/207 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 07:29:39,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 07:29:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 07:29:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038647342995169 [2023-08-04 07:29:39,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 07:29:39,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 07:29:39,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:39,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 07:29:39,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 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 07:29:39,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:39,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:39,074 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 375 transitions. [2023-08-04 07:29:39,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 07:29:39,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:29:39,077 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 07:29:39,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-04 07:29:39,078 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 07:29:39,079 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 07:29:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 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 07:29:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:39,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:29:39,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:39,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:39,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:39,286 INFO L85 PathProgramCache]: Analyzing trace with hash 106175543, now seen corresponding path program 1 times [2023-08-04 07:29:39,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:39,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651068195] [2023-08-04 07:29:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:39,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651068195] [2023-08-04 07:29:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651068195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595998275] [2023-08-04 07:29:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:39,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:39,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:39,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 07:29:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:39,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:29:39,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:39,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:29:39,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595998275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:39,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 07:29:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100263125] [2023-08-04 07:29:39,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:29:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:29:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:29:39,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 207 [2023-08-04 07:29:39,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 07:29:39,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:39,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 207 [2023-08-04 07:29:39,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:41,364 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 07:29:41,364 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 07:29:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 213909 event pairs, 14820 based on Foata normal form. 3/33868 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 07:29:41,520 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 07:29:41,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 07:29:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:29:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:29:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 07:29:41,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785024154589372 [2023-08-04 07:29:41,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 07:29:41,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 07:29:41,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:41,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 07:29:41,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 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 07:29:41,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:41,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:41,526 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 479 transitions. [2023-08-04 07:29:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 07:29:41,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:29:41,531 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 07:29:41,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 07:29:41,532 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 07:29:41,532 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 07:29:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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 07:29:41,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:41,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:41,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:29:41,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:41,737 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:41,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash -71554360, now seen corresponding path program 1 times [2023-08-04 07:29:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:41,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605667107] [2023-08-04 07:29:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:29:41,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605667107] [2023-08-04 07:29:41,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605667107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:41,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303580950] [2023-08-04 07:29:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:41,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:41,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:41,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 07:29:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:41,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:29:41,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:29:41,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:29:41,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303580950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:41,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:41,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:29:41,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594427716] [2023-08-04 07:29:41,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:41,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:29:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:29:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:41,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 207 [2023-08-04 07:29:41,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 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 07:29:41,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:41,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 207 [2023-08-04 07:29:41,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:43,639 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 07:29:43,639 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 07:29:43,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160037 event pairs, 11902 based on Foata normal form. 27/26511 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 07:29:43,754 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 07:29:43,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 07:29:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:29:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:29:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 07:29:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5881642512077294 [2023-08-04 07:29:43,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 07:29:43,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 07:29:43,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:43,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 07:29:43,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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 07:29:43,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:43,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:43,759 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 487 transitions. [2023-08-04 07:29:43,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 07:29:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:29:43,762 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 07:29:43,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 07:29:43,763 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 07:29:43,763 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 07:29:43,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 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 07:29:43,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:43,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:43,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 07:29:43,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:43,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:43,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash -318034347, now seen corresponding path program 1 times [2023-08-04 07:29:43,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:43,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420084691] [2023-08-04 07:29:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:29:44,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420084691] [2023-08-04 07:29:44,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420084691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348356993] [2023-08-04 07:29:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:44,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:44,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:29:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:44,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:29:44,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:29:44,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:29:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348356993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:44,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:29:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532444422] [2023-08-04 07:29:44,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:44,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:29:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:29:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:29:44,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 207 [2023-08-04 07:29:44,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 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 07:29:44,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:44,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 207 [2023-08-04 07:29:44,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:45,682 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 07:29:45,682 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 07:29:45,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 127879 event pairs, 6886 based on Foata normal form. 243/23451 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 07:29:45,761 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 07:29:45,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 07:29:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:29:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:29:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-04 07:29:45,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2023-08-04 07:29:45,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-04 07:29:45,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-04 07:29:45,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:45,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-04 07:29:45,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 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 07:29:45,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:45,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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 07:29:45,767 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 495 transitions. [2023-08-04 07:29:45,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 07:29:45,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:29:45,770 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 07:29:45,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-04 07:29:45,771 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 07:29:45,771 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 07:29:45,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 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 07:29:45,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:45,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:45,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 07:29:45,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 07:29:45,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:45,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash -261361677, now seen corresponding path program 1 times [2023-08-04 07:29:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:45,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303907667] [2023-08-04 07:29:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:45,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:29:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303907667] [2023-08-04 07:29:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303907667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:46,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:29:46,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:29:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517522392] [2023-08-04 07:29:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:46,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:29:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:29:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:29:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 207 [2023-08-04 07:29:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 07:29:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 207 [2023-08-04 07:29:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:47,822 INFO L124 PetriNetUnfolderBase]: 24514/31975 cut-off events. [2023-08-04 07:29:47,822 INFO L125 PetriNetUnfolderBase]: For 16237/16237 co-relation queries the response was YES. [2023-08-04 07:29:47,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72484 conditions, 31975 events. 24514/31975 cut-off events. For 16237/16237 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 178656 event pairs, 7128 based on Foata normal form. 36/31971 useless extension candidates. Maximal degree in co-relation 72408. Up to 30501 conditions per place. [2023-08-04 07:29:47,969 INFO L140 encePairwiseOnDemand]: 201/207 looper letters, 56 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-04 07:29:47,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 404 flow [2023-08-04 07:29:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:29:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:29:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-08-04 07:29:47,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6215780998389694 [2023-08-04 07:29:47,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-08-04 07:29:47,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-08-04 07:29:47,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:47,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-08-04 07:29:47,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 07:29:47,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:47,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 207.0) internal successors, (828), 4 states have internal predecessors, (828), 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 07:29:47,973 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 386 transitions. [2023-08-04 07:29:47,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 404 flow [2023-08-04 07:29:47,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:29:47,978 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 184 flow [2023-08-04 07:29:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 07:29:47,979 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 07:29:47,979 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 184 flow [2023-08-04 07:29:47,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 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 07:29:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:29:47,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:47,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 487721746, now seen corresponding path program 1 times [2023-08-04 07:29:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582847255] [2023-08-04 07:29:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:29:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582847255] [2023-08-04 07:29:48,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582847255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:29:48,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:29:48,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:29:48,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039682685] [2023-08-04 07:29:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:29:48,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:29:48,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:29:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:29:48,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 207 [2023-08-04 07:29:48,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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 07:29:48,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:48,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 207 [2023-08-04 07:29:48,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:50,166 INFO L124 PetriNetUnfolderBase]: 25504/33193 cut-off events. [2023-08-04 07:29:50,167 INFO L125 PetriNetUnfolderBase]: For 16199/16251 co-relation queries the response was YES. [2023-08-04 07:29:50,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79923 conditions, 33193 events. 25504/33193 cut-off events. For 16199/16251 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 174955 event pairs, 5629 based on Foata normal form. 1281/32723 useless extension candidates. Maximal degree in co-relation 45884. Up to 25341 conditions per place. [2023-08-04 07:29:50,314 INFO L140 encePairwiseOnDemand]: 198/207 looper letters, 79 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2023-08-04 07:29:50,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 581 flow [2023-08-04 07:29:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:29:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:29:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 601 transitions. [2023-08-04 07:29:50,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806763285024155 [2023-08-04 07:29:50,317 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 601 transitions. [2023-08-04 07:29:50,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 601 transitions. [2023-08-04 07:29:50,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:50,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 601 transitions. [2023-08-04 07:29:50,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 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 07:29:50,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 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 07:29:50,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 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 07:29:50,319 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 184 flow. Second operand 5 states and 601 transitions. [2023-08-04 07:29:50,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 581 flow [2023-08-04 07:29:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:29:50,326 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 288 flow [2023-08-04 07:29:50,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2023-08-04 07:29:50,327 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-04 07:29:50,327 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 288 flow [2023-08-04 07:29:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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 07:29:50,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:50,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:29:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 07:29:50,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:50,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash -991882305, now seen corresponding path program 1 times [2023-08-04 07:29:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634639800] [2023-08-04 07:29:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:29:50,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:50,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634639800] [2023-08-04 07:29:50,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634639800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:50,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375427716] [2023-08-04 07:29:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:50,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:50,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:50,441 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:29:50,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 07:29:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:50,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 07:29:50,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:29:50,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:29:50,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375427716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:50,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:50,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-04 07:29:50,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483060470] [2023-08-04 07:29:50,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:50,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:29:50,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:29:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:29:51,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 207 [2023-08-04 07:29:51,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 288 flow. Second operand has 15 states, 15 states have (on average 94.13333333333334) internal successors, (1412), 15 states have internal predecessors, (1412), 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 07:29:51,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:51,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 207 [2023-08-04 07:29:51,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:30:10,165 INFO L124 PetriNetUnfolderBase]: 225551/292078 cut-off events. [2023-08-04 07:30:10,165 INFO L125 PetriNetUnfolderBase]: For 334934/334934 co-relation queries the response was YES. [2023-08-04 07:30:11,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894132 conditions, 292078 events. 225551/292078 cut-off events. For 334934/334934 co-relation queries the response was YES. Maximal size of possible extension queue 9924. Compared 1864065 event pairs, 1248 based on Foata normal form. 12815/304876 useless extension candidates. Maximal degree in co-relation 894027. Up to 101749 conditions per place. [2023-08-04 07:30:11,880 INFO L140 encePairwiseOnDemand]: 188/207 looper letters, 335 selfloop transitions, 277 changer transitions 308/923 dead transitions. [2023-08-04 07:30:11,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 923 transitions, 5746 flow [2023-08-04 07:30:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-04 07:30:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-04 07:30:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4461 transitions. [2023-08-04 07:30:11,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538768115942029 [2023-08-04 07:30:11,888 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4461 transitions. [2023-08-04 07:30:11,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4461 transitions. [2023-08-04 07:30:11,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:30:11,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4461 transitions. [2023-08-04 07:30:11,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 111.525) internal successors, (4461), 40 states have internal predecessors, (4461), 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 07:30:11,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 207.0) internal successors, (8487), 41 states have internal predecessors, (8487), 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 07:30:11,905 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 207.0) internal successors, (8487), 41 states have internal predecessors, (8487), 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 07:30:11,905 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 288 flow. Second operand 40 states and 4461 transitions. [2023-08-04 07:30:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 923 transitions, 5746 flow [2023-08-04 07:30:13,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 923 transitions, 5713 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:30:13,291 INFO L231 Difference]: Finished difference. Result has 143 places, 369 transitions, 2800 flow [2023-08-04 07:30:13,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2800, PETRI_PLACES=143, PETRI_TRANSITIONS=369} [2023-08-04 07:30:13,292 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2023-08-04 07:30:13,292 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 369 transitions, 2800 flow [2023-08-04 07:30:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.13333333333334) internal successors, (1412), 15 states have internal predecessors, (1412), 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 07:30:13,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:30:13,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:30:13,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 07:30:13,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 07:30:13,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:30:13,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:30:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash -210897795, now seen corresponding path program 1 times [2023-08-04 07:30:13,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:30:13,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853532747] [2023-08-04 07:30:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:30:13,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:30:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:30:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:30:13,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:30:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853532747] [2023-08-04 07:30:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853532747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:30:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299352134] [2023-08-04 07:30:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:30:13,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:30:13,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:30:13,661 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:30:13,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 07:30:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:30:13,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 07:30:13,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:30:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:30:13,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:30:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:30:14,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299352134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:30:14,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:30:14,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-08-04 07:30:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449165168] [2023-08-04 07:30:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:30:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 07:30:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:30:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 07:30:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2023-08-04 07:30:14,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 207 [2023-08-04 07:30:14,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 369 transitions, 2800 flow. Second operand has 20 states, 20 states have (on average 90.6) internal successors, (1812), 20 states have internal predecessors, (1812), 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 07:30:14,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:30:14,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 207 [2023-08-04 07:30:14,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand